Best HVAC Companies for Boiler and Radiant Heating Installation and Repair (2026)

The research in brief

Janes Radiant Heating is the consensus leader for boiler and radiant heating service, named by all 7 platforms studied (100.0% share) at an average listed position of 1.29 and a best position of 1. It is strongest for Western Washington on-site work and nationwide DIY hydronic kits. For distinct buyer needs, the strongest alternatives are John Owens Services (Marin/Sonoma County, California, Eichler slab radiant diagnostics), North Sound Boilers & Radiant (Seattle/Puget Sound, combustion-analysis annual service), TJ's Plumbing & Heating, Inc. (Northwestern Pennsylvania and Western New York, 24/7 repair), Riviance (southeastern Michigan, hot-water and steam boilers), Water Heaters Unlimited (North Idaho, published $6,500 boiler-replacement starting price), and Just Right Services (Greater Boston, Viessmann and hybrid radiant/radiator retrofits). The principal limitation: this study used one standardized prompt sent once to each included platform, and company-owned citations materially outnumber independent ones, so platform recommendations are market intelligence rather than verified proof of quality.

Research Snapshot

• Topic: Best HVAC companies for boiler and radiant heating installation and repair.
• Target buyer: A homeowner with a boiler-based or radiant heating system, common in older homes, who needs installation, replacement, or repair rather than forced-air service.
• Platforms included (7): ChatGPT, Claude, DeepSeek, Grok, Perplexity, Kimi, Gemini.
• Research date: 2026-10-01 (authoritative run date).
• Unique entities named across platforms: 40.
• Qualifying entities: 7.
• Eligibility rule: Named by at least two platforms during ranking discovery.
• Geography: United States.
• Ranking unit: HVAC contractor or company brand.

Platform-reported research dates differ from the authoritative run date for some platforms (DeepSeek reported 2026-06-11 for Janes Radiant Heating, 2026-02-14 for John Owens Services, 2026-06-01 for North Sound Boilers & Radiant, 2026-01-15 for TJ's Plumbing & Heating, Inc., 2026-01-15 for Riviance, 2026-01-15 for Water Heaters Unlimited, and 2026-06-12 for Just Right Services). These are provenance metadata and do not independently prove freshness.

The Consensus Ranking

Questions explored

• What are the best HVAC companies for boiler and radiant heating service in 2026?
• Which boiler and radiant heating contractor was named by the most AI platforms?
• Which companies made the final consensus ranking for hydronic and radiant heating work?

The table below is the sole authority for rank, platform mentions, platform share, average listed position, and best position. Platform mentions count only ranking-discovery mentions, not the number of platforms that later completed a fit assessment.

Which provider fits your needs?

Questions explored

• Which boiler and radiant heating company should a homeowner choose if they need on-site service rather than a DIY kit?
• Is a regional hydronic specialist better than a general HVAC company for an older boiler system?
• Which contractor should a buyer pick for steam boiler or cast-iron radiator work rather than radiant-floor installation?

The ranking measures cross-platform consensus, not universal suitability. Buyer fit depends heavily on geography, system type, and whether the homeowner wants on-site labor or a self-install kit.

1. Janes Radiant Heating

Questions explored

• Is Janes Radiant Heating worth it for boiler and radiant heating service, and what are its main drawbacks?
• Can Janes Radiant Heating serve a homeowner outside Western Washington who needs on-site boiler repair?
• What should a buyer verify before ordering a Janes Radiant Heating DIY hydronic kit?

Janes Radiant Heating is the only entity named by all 7 platforms, and its fit ratings ranged from "strong" (Claude) to "good" (ChatGPT, Gemini, Perplexity) to "mixed" (DeepSeek, Grok) to "uncertain" (Kimi). The company presents itself as a hydronic and radiant heating specialist offering design, installation, boiler repair and replacement, maintenance, and custom DIY kits ^[92]. Its professional service area is Western Washington and surrounding islands, while DIY kits ship nationwide ^[97].

Why it ranked here. Seven of seven platforms named it, with six placing it at position 1 or 2. No other entity in this study achieved 100.0% platform share. The consensus reflects a rare combination: exclusive hydronic focus, a long operating history, and a nationwide product that platforms could recommend even to buyers outside the service territory.

Best suited for. Existing boiler owners in Western Washington needing diagnosis, repair, replacement, or annual maintenance; homeowners planning hydronic or radiant-floor installation in the Puget Sound region; custom-home or renovation projects requiring zoning, manifolds, tubing, and boiler integration; and DIY buyers nationwide ^[100].

Main strengths for the use case. The company states that its technicians service electric, natural-gas, propane, and oil boilers, indirect water heaters, boiler replacements, and mechanical-panel updates, and claims experience with more than 24 boiler brands ^[92]. Published system options include natural-gas and propane boilers, combi boilers, electric boilers, heating-only systems, and systems with domestic-hot-water capability ^[103]. For DIY buyers, kits include system design, loop layouts, installation guides, preassembled and tested components, pre-wired mechanical panels, and phone support ^[97]. Google-reported evidence describes technicians factory-trained in 24+ brands including US Boiler, Rinnai, Lochinvar, and Weil McLain ^[93].

Main limitations. Professional onsite coverage appears regional rather than nationwide; the reviewed evidence does not show nationwide onsite professional service ^[94]. Public pricing and commercial terms are limited, with no published labor rates, equipment prices, diagnostic fees, or warranty terms identified in the reviewed official pages ^[92]. Most evidence reviewed consists of company claims and company-hosted testimonials; independent review data, third-party performance studies, licensing verification, and audited customer-outcome evidence were not established in the reviewed sources ^[92]. One documented review cited a computer board replaced at roughly $600 installed versus a $250 retail part price, a total job cost near $1,000 ^[153]. Yelp rating was reported at 4.0 with 94 reviews ^[177].

Pricing or cost summary. No public labor rates, equipment prices, package prices, diagnostic fees, dispatch fees, warranty terms, or maintenance-plan prices were identified in the reviewed official pages; the company directs buyers to request a consultation or quote ^[92]. Anthropic-reported evidence cites a service-call diagnostic starting at $200–$230, typical repair estimates of $300–$850, and an hourly labor rate of $170 per hour ^[177]. Grok-reported customer reports cite $2,300–$2,400 for boiler or radiator repairs ^[159]. The DIY page claims potential installation-cost savings of 40% to 60%, which is a company claim rather than an independently verified price comparison ^[2]. Pricing confidence across platforms was low to moderate.

Where platforms disagreed. Kimi could not access the company website during research and rated fit "uncertain," noting that no independent sources covering the company were found in its search results ^[91]. Deepseek rated fit "mixed" because independent verification of licensing, insurance, certifications, pricing, service area, and reputation was not confirmed ^[91]. Grok rated fit "mixed" citing service geography and review concerns ^[153]. Anthropic rated fit "strong," while ChatGPT, Gemini, and Perplexity rated it "good." Founding-year and installation-count claims also conflict across sources: marketing materials alternate between 1986, 1987, and 1990, and installation totals are stated as "over 15,000," "17,000+," or "20,000+" ^[147].

Complete fit review: Janes Radiant Heating

2. John Owens Services

Questions explored

• Is John Owens Services better than Janes Radiant Heating for Eichler slab radiant diagnostics in Marin or Sonoma County?
• What should a buyer verify about the John Owens Services 10-year parts-and-labor guarantee before signing?
• Does John Owens Services serve homeowners outside Marin and Sonoma County, California?

John Owens Services was named by 3 platforms (DeepSeek, Grok, Kimi) at an average listed position of 3.67 and a best position of 2. Fit ratings ranged from "strong" (Claude, Gemini, Grok) to "good" (ChatGPT, Perplexity) to "mixed" (DeepSeek) to "uncertain" (Kimi). The company advertises boiler and radiant heating installation, repair, and maintenance, including hydronic boilers, radiant floors, radiators, radiant panels, manifolds, indirect water heaters, high-efficiency boilers, cast-iron boilers, and Eichler/slab radiant diagnostics ^[9].

Why it ranked here. It received the second-highest best position (2) among qualifying entities and was the only non-Washington entity named by three platforms. Its California C-4 radiant heating and boilers classification and explicit Eichler slab language gave platforms a specific, verifiable-sounding specialty to cite ^[11].

Best suited for. Repair or replacement of residential hydronic boilers in Marin or Sonoma County; Eichler and other in-slab radiant-heating troubleshooting; radiant-floor, radiator, radiant-panel, manifold, and hydronic-furnace service; and homeowners seeking one contractor for boiler, plumbing, HVAC, and related electrical work ^[16].

Main strengths for the use case. The company states that it installs and services condensing/high-efficiency, cast-iron, and copper boilers, as well as radiant floors, radiators, radiant panels, manifolds, hydronic furnaces, and indirect water heaters ^[9]. Its contact page identifies California license number 501853 and lists C-4 radiant heating and boilers, C-20 HVAC, C-36 plumbing, C-10 electrical, and B general-building classifications; BBB independently lists license number 501853 with a reported expiration date of June 30, 2028 ^[11]. Google-reported evidence describes sizing condensing boilers to actual heat loss and designing loop systems so return water is cool enough for true high-efficiency performance ^[20]. Anthropic-reported evidence cites a 4.9-star Google rating with 900+ reviews and a 4.8-star Birdeye rating with 630 reviews ^[139].

Main limitations. Service area is limited to Marin and Sonoma County based on the sources reviewed ^[11]. Public pricing is not sufficiently detailed for cost comparison ^[9]. Most technical capability claims come from the company itself, and no independent source reviewed verified installation outcomes, diagnostic accuracy, average repair time, or value relative to competing hydronic contractors ^[9]. Deepseek rated fit "mixed," noting that independent third-party evidence specifically validating boiler and radiant heating workmanship, pricing, licensing scope, or outcomes in this niche is thin, and that the Eichler/slab radiant specialty from the ranking stage was not independently corroborated in its sources ^[3]. Kimi could not access the website and rated fit "uncertain" ^[3].

Pricing or cost summary. Exact boiler service, repair, maintenance, and replacement prices are unclear; the official site promotes estimates, financing, seasonal offers, and a $200 qualifying-installation discount whose eligibility and current applicability should be confirmed ^[9]. EnergySage reports a 10-year parts-and-labor guarantee for installed equipment when scheduled maintenance requirements are met ^[167]. Anthropic-reported evidence cites free estimates and discounts of $200 off installs or $50 off repairs for veterans and seniors, plus $35 off repairs in some service areas ^[142]. Pricing confidence was low across platforms.

Where platforms disagreed. Anthropic, Gemini, and Grok rated fit "strong," while DeepSeek rated it "mixed" and Kimi "uncertain." The disagreement centers on evidence quality rather than service scope: the company's own pages and directory profiles support the specialty claims, but independent verification of boiler-specific outcomes was limited in several platforms' sources ^[3]. Company history wording also conflicts: the official site states service since 1986, while other pages reference 40, 50, or "over 30 decades" of boiler experience without clarifying whether that includes pre-1986 experience ^[9].

Complete fit review: John Owens Services

3. North Sound Boilers & Radiant

Questions explored

• Is North Sound Boilers & Radiant worth it for annual boiler service with combustion analysis in the Seattle area?
• Which company should a Puget Sound homeowner choose if they need both radiant-floor design and annual maintenance?
• What should a buyer verify about the North Sound Boilers & Radiant annual service plan price and contract terms?

North Sound Boilers & Radiant was named by 2 platforms (DeepSeek, Kimi) at an average listed position of 1.50 and a best position of 1. Fit ratings ranged from "strong" (Claude, Gemini, Grok, Kimi) to "good" (ChatGPT, DeepSeek, Perplexity). The company states that it focuses exclusively on high-efficiency boilers and radiant systems and offers boiler design, installation, replacement, repair, annual service, heat-exchanger cleaning, combustion analysis, and system commissioning ^[41].

Why it ranked here. It tied for the best average listed position (1.50) among all qualifying entities despite being named by only two platforms. Both naming platforms placed it at position 1 or 2, which is why it ranks third overall under the mentions-first rule.

Best suited for. Existing boiler owners needing specialized diagnosis, repair, replacement, or annual maintenance; homeowners planning hydronic or radiant-floor installation in the Seattle/Puget Sound region; and custom-home or renovation projects requiring system design, zoning, manifolds, tubing, and boiler integration ^[49].

Main strengths for the use case. The advertised annual service plan includes full heat-exchanger cleaning, combustion analysis, and inspection of system components ^[41]. The company advertises radiant diagnostics involving manifolds, actuators, circulation, and thermal imaging ^[50]. Google-reported evidence describes the founder as a former manufacturer's representative and hydronics instructor ^[42]. Anthropic-reported evidence cites a 5.0-star rating with 23 verified reviews on Birdeye and 21 reviews on TrustIndex with an identical 5.0 rating ^[146]. BuildZoom reported a score of 101, placing the company above 88% of Washington contractors, and a $1,000,000 insurance policy with Hiscox Insurance Company ^[161].

Main limitations. Public pricing is incomplete and the annual-plan cost is not disclosed ^[41]. Service-area boundaries and travel charges are not fully specified ^[41]. Warranty, licensing, insurance, certifications, manufacturer-authorized status, and permit practices were not verified from the reviewed pages ^[41]. Deepseek rated fit "good" but noted that no independent review platform data was located in its sources and that combustion analysis inclusion in the annual service plan was not confirmed by its reviewed source ^[41]. The company positions its work toward luxury or premium systems, which may imply higher project costs ^[50].

Pricing or cost summary. The site advertises $249 for full-system inspection, boiler cleaning, and service, and $79 for full-system inspection and boiler tuning ^[41]. It also states that typical new-construction radiant systems range from $60,000 to $90,000 ^[50]. The annual service-plan price and most project-specific costs require a quote ^[41]. One customer review described a boiler replacement as "not inexpensive - more than my used car cost" ^[176]. Pricing confidence was low to moderate.

Where platforms disagreed. Deepseek rated fit "good" and flagged that the exact service area is not clearly stated, that whether the annual service plan specifically includes combustion analysis is unclear from its reviewed source, and that licensing, insurance, and bonding status could not be verified ^[41]. Anthropic, Gemini, Grok, and Kimi rated fit "strong." Company scale is also described inconsistently: business data indicates approximately one employee and estimated annual revenue of $112,495, while company descriptions emphasize a "team" ^[162].

Complete fit review: North Sound Boilers & Radiant

4. TJ's Plumbing & Heating, Inc.

Questions explored

• Is TJ's Plumbing & Heating, Inc. worth it for 24/7 boiler repair in Northwestern Pennsylvania or Western New York?
• Which TJ's Plumbing & Heating entity serves Erie, Pennsylvania versus the Boston area?
• What should a buyer verify about TJ's Plumbing & Heating, Inc. pricing and warranty terms before hiring?

TJ's Plumbing & Heating, Inc. was named by 2 platforms (DeepSeek, Kimi) at an average listed position of 4.00 and a best position of 3. Fit ratings ranged from "strong" (Gemini, Grok) to "good" (ChatGPT, Perplexity) to "uncertain" (Claude, DeepSeek, Kimi). The company advertises hydronic radiant heating installation, retrofit, diagnostics, boiler service, and 24/7 repair ^[63].

Why it ranked here. It was named by two platforms and placed at position 3 by Kimi and position 5 by DeepSeek. Its advertised 24/7 availability and cold-climate positioning gave platforms a distinct buyer segment to cite.

Best suited for. Boiler-based and hydronic radiant-floor repair in the company's stated Northwestern Pennsylvania and Western New York service area; radiant-floor installation or retrofit involving boilers, PEX tubing, manifolds, pumps, mixing valves, zoning, and thermostats; and homeowners who value advertised 24/7 or same-day heating availability ^[69].

Main strengths for the use case. The company advertises radiant-floor installation using heat-load calculations, tubing layout, oxygen-barrier PEX, high-efficiency boiler integration, zoning, and thermostat controls, and states that existing homes can be retrofitted subject to floor construction and finished-floor constraints ^[69]. Advertised troubleshooting includes inspection and performance testing, thermal imaging, pressure testing, flow and leak diagnosis, air removal, circulator-pump repair, boiler or control-system repair, system balancing, and verification ^[69]. Google-reported evidence cites licensed master professionals (No. P2600019) and financing through Wells Fargo and GreenSky ^[66].

Main limitations. No public price list or detailed standard scope for boiler replacement or radiant retrofit was found ^[63]. No independently verified project portfolio, customer-outcome data, or certification evidence was found in the reviewed sources ^[63]. Radiant retrofit feasibility depends on floor construction, finished-floor height, insulation, tubing access, and flooring ^[69]. The company appears regionally focused, not a nationwide provider ^[63].

Pricing or cost summary. Pricing is not publicly disclosed for the relevant boiler or radiant-heating services; a project-specific estimate appears to be required ^[63]. Anthropic-reported evidence cites Angi reviews referencing a $196 two-hour diagnostic and boiler replacement installations reported in the $6,000–$11,000+ range, but these do not represent standardized pricing ^[149]. Google-reported evidence cites free estimates, low diagnostic fees, coupons such as $25 off services, senior, military, and civil service discounts, and payment plans through Wells Fargo and GreenSky ^[66]. Pricing confidence was low to moderate.

Where platforms disagreed. The most material disagreement is entity identity. Anthropic reported two distinct legal entities operating under the same brand: a Massachusetts entity incorporated 1993 based in Attleboro/Foxboro (tjsradiantheat.com) and a Pennsylvania entity incorporated 2013 based in Jamestown, New York (tjsplumbing.com) ^[156]. Openai also flagged a separate similarly named TJ's Radiant Heat operating near Boston and throughout New England ^[78]. Deepseek and Kimi rated fit "uncertain" because they could not verify boiler/radiant capability, licensing, service area, or pricing from accessible sources ^[63]. Google and Grok rated fit "strong." Company history also conflicts: the site states service since 2007 and separately that homeowners have relied on it for over 30 years ^[64].

Complete fit review: TJ's Plumbing & Heating, Inc.

5. Riviance

Questions explored

• Is Riviance worth it for steam boiler repair or replacement in Ann Arbor or Ypsilanti, Michigan?
• Does Riviance install radiant-floor heating, or does it focus mainly on boilers and steam systems?
• What should a buyer verify about Riviance's Michigan mechanical contractor license classification before hiring?

Riviance was named by 2 platforms (DeepSeek, Kimi) at an average listed position of 5.00 and a best position of 3. Fit ratings ranged from "good" (Claude, Gemini, Grok, ChatGPT) to "mixed" (Kimi) to "uncertain" (DeepSeek, Perplexity). The company advertises boiler repair and installation service, including hot-water and steam boilers, hydronic heating, radiator/baseboard upgrades, and related controls ^[52].

Why it ranked here. It was named by two platforms and placed at position 3 by DeepSeek and position 7 by Kimi. Its advertised hot-water and steam boiler capability and Michigan regional focus gave platforms a specific older-home buyer segment.

Best suited for. Residential boiler repair or replacement in Ann Arbor, Ypsilanti, Chelsea, Saline, Dexter, Canton, and nearby areas; older hot-water or steam boiler systems; and homeowners seeking one contractor for boiler, controls, radiator/baseboard, and hydronic distribution work ^[60].

Main strengths for the use case. The boiler service page states that it repairs and installs hot-water and steam boilers, including older cast-iron systems and newer high-efficiency units, and lists Weil-McLain, Navien, Burnham, Peerless, Buderus, and Bosch among brands it services or installs ^[52]. The company states that boiler replacements include heat-loss calculations, equipment sizing, gas connection, venting, controls integration, and commissioning ^[52]. Google-reported evidence cites technicians holding Michigan LARA mechanical contractor credentials and experience servicing both hot-water and steam boiler systems common in Ypsilanti's older housing stock ^[58].

Main limitations. Evidence is predominantly company-owned website content ^[52]. No independently verified license record, license number, or current classification was established ^[52]. No public boiler-specific portfolio, radiant-floor project list, or detailed technical case studies were located ^[52]. Anthropic reported no evidence of radiant floor or wall heating system design, installation, or hydronic radiant system capabilities in company website content, directory listings, or service descriptions ^[51]. Kimi noted the website emphasizes boiler repair and replacement rather than radiant floor heating design or installation, with no mention of radiant-specific diagnostic tools such as thermal imaging, manifold work, or zone stacking ^[61].

Pricing or cost summary. Riviance states that most boiler repairs typically range from $150 to $900 depending on the component and complexity, and advertises free estimates and financing for new boiler installations; these are company-stated figures, not an independently validated price schedule ^[52]. Anthropic-reported industry benchmarks cite national boiler purchase and installation costs of $3,600–$8,500, diagnostic fees of $40–$250, labor rates of $50–$100 per hour plus parts, and annual boiler service of $75–$300 ^[182]. Pricing confidence was low.

Where platforms disagreed. The central disagreement is licensing and radiant capability. Grok and Kimi reported a Michigan Class 7 hydronic heating license covering radiant systems ^[52], while ChatGPT reported that Riviance's pages contain inconsistent descriptions referring to both a Class 7 license and Class 5 or three classifications, and that the applicable current classification should be verified directly with Michigan authorities ^[52]. Google reported that a Class 7 hydronic heating license is not explicitly listed or highlighted on the website ^[51]. Anthropic found no documented radiant floor or wall heating expertise ^[51]. Deepseek and Perplexity rated fit "uncertain" because licensing, brand authorizations, radiant expertise, pricing, warranty, and reviews could not be independently verified ^[51].

Complete fit review: Riviance

6. Water Heaters Unlimited

Questions explored

• Which boiler and radiant heating company in North Idaho publishes a starting price for boiler replacement?
• Is Water Heaters Unlimited worth it for radiant-floor retrofit or hydronic zone work in Bonner or Kootenai County?
• What should a buyer verify about Water Heaters Unlimited's service area and annual maintenance contract terms?

Water Heaters Unlimited was named by 2 platforms (DeepSeek, Kimi) at an average listed position of 5.50 and a best position of 4. Fit ratings ranged from "strong" (Grok, Kimi, Perplexity) to "good" (Gemini, ChatGPT) to "uncertain" (DeepSeek) to "weak" (Claude). The company states that it provides annual boiler service, no-heat diagnostics, hydronic system design and installation, combustion-analysis reports, boiler replacement, and service for modulating-condensing and cast-iron boilers ^[131].

Why it ranked here. It was named by two platforms and placed at position 4 by Kimi and position 7 by DeepSeek. Its published $6,500 boiler-replacement starting price and detailed combustion-analysis language gave platforms concrete, quotable specifics.

Best suited for. Homeowners in Bonner, Kootenai, or Boundary counties in Idaho; existing hydronic systems needing annual service, combustion analysis, no-heat diagnostics, zone-valve or circulator work, or radiant-floor troubleshooting; and boiler replacement or new hydronic design where a heat-loss calculation, zoning, near-boiler piping, and commissioning documentation are wanted ^[131].

Main strengths for the use case. The published scope includes radiant-floor systems, staple-up retrofit installations, slab-on-grade tubing, manifolds, mixing valves, controls, and snow-melt slabs ^[131]. The company states that annual service includes combustion analysis, condensate and neutralizer cleaning, pressure-relief testing, expansion-tank checks, circulator inspection, zone-valve testing, venting or draft checks, and a written service log ^[131]. It lists Triangle Tube, Lochinvar, Weil-McLain, Burnham, Taco, and Grundfos among its stated installation, service, or certification relationships ^[131]. Google-reported evidence cites Taco and Grundfos certification and service across 18 cities in Bonner, Kootenai, and Boundary counties ^[123].

Main limitations. Service territory is regional and not representative of nationwide availability ^[131]. Most evidence is self-reported by the company; independent verification of certifications, licensing, installation volume, and customer outcomes is limited ^[131]. No published price for annual boiler service, maintenance contracts, diagnostics, radiant-floor work, or hydronic repairs was found ^[131]. The company explicitly does not provide drain cleaning, fixture work, repipes, sewer lines, septic, HVAC air-handling, or electrical services ^[130]. Anthropic rated fit "weak" for the national version of this buyer need, noting the company serves only a narrow geographic region despite being an excellent local specialist ^[145].

Pricing or cost summary. The company publishes a starting price of $6,500 for residential boiler replacement, with near-boiler piping and a combustion-analysis report included; final pricing depends on fuel type, venting, gas-line condition, and the selected unit ^[118]. A no-heat diagnostic fee is disclosed before dispatch and credited if the customer proceeds with repair ^[131]. Annual service, repair, radiant-floor installation, and maintenance-contract pricing are not publicly listed ^[131]. Pricing confidence was moderate.

Where platforms disagreed. Deepseek rated fit "uncertain," noting that the company's public-facing name and category association point to water heaters rather than hydronic boilers, that no reviewed source confirmed boiler installation, replacement, or repair capability, and that the normalization audit flagged that a fetched domain was not corroborated by brand-name or site-identity metadata ^[118]. Anthropic rated fit "weak" on geographic grounds while describing the technical match as strong locally ^[145]. Grok, Kimi, and Perplexity rated fit "strong." The company also brands itself alternately as "Water Heaters Unlimited" and "Sandpoint Plumber & North Idaho Specialists," and whether it services oil or steam boilers is unstated ^[131].

Complete fit review: Water Heaters Unlimited

7. Just Right Services

Questions explored

• Is Just Right Services worth it for a Viessmann boiler retrofit in Greater Boston?
• Which company should a Greater Boston homeowner choose for a hybrid radiant-floor and cast-iron radiator system?
• What should a buyer verify about Just Right Services' manufacturer certifications and warranty terms before hiring?

Just Right Services was named by 2 platforms (DeepSeek, Kimi) at an average listed position of 6.00 and a best position of 6. Fit ratings ranged from "strong" (Claude, Gemini, Grok) to "good" (ChatGPT, Perplexity) to "uncertain" (DeepSeek, Kimi). The company advertises hydronic radiant heating design and installation, including boiler replacement, radiant-floor systems, system integration, and hydronic troubleshooting ^[25].

Why it ranked here. It was named by two platforms, both at position 6. Its documented Viessmann and hybrid radiant/radiator projects and Greater Boston service territory gave platforms a specific New England buyer segment.

Best suited for. Greater Boston homeowners replacing or upgrading a hydronic boiler system; older homes combining cast-iron radiators with new radiant-floor zones; and radiant-floor heating in kitchens, bathrooms, and selected remodel areas ^[37].

Main strengths for the use case. The official site explicitly lists radiant heating, in-floor heating, and hydronic snow-melt systems, and documents a hybrid radiant-floor and cast-iron radiator project in Melrose plus multiple hydronic snow-melt installations ^[37]. Google-reported evidence describes a hybrid radiant floor system in Melrose featuring a Viessmann boiler, Tekmar controls, Grundfos pumps, and Viega tubing, plus a Burnham SteamMax steam boiler replacement in Saugus ^[34]. The company displays Viessmann and Lochinvar among its installation partners and also lists Burnham, Tekmar, Viega, Caleffi, Grundfos, and Taco ^[25]. The official site lists Massachusetts license numbers for master plumbing and gas fitting, unrestricted sheet-metal work, and construction supervision ^[26].

Main limitations. The company appears geographically concentrated in Greater Boston rather than nationwide ^[25]. Public information does not prove current factory-authorized status for Viessmann or Lochinvar ^[25]. Published material does not provide detailed boiler-model coverage, fuel-type coverage, balancing procedures, heat-load methodology, or commissioning documentation ^[25]. No published pricing, maintenance-plan pricing, warranty terms, financing terms, or cancellation policy were found ^[25]. Deepseek rated fit "uncertain" because the available evidence is almost entirely company-owned website content with no independent verification, licensing records, service-area confirmation, or customer outcome evidence ^[25]. Kimi could not access the website and rated fit "uncertain" ^[25].

Pricing or cost summary. Published pricing was not found for boiler repair, boiler replacement, radiant-floor installation, hydronic design, balancing, or maintenance; the company promotes upfront estimates ^[25]. Anthropic-reported building permit records show historical project valuations ranging $2,500–$5,800 for boiler work in the 2020–2022 timeframe, unclear whether complete installations or labor-only ^[160]. One customer review noted the company was not the lowest-price option but was selected for expertise, and that the quoted price matched the final invoice ^[27]. Pricing confidence was low to moderate.

Where platforms disagreed. Deepseek and Kimi rated fit "uncertain" on evidence-access grounds, while Claude, Gemini, and Grok rated it "strong." Perplexity rated fit "good" but noted that public evidence does not clearly verify specific boiler installation brands or models such as Viessmann or Lochinvar, and that the 3-year performance guarantee and NATE certification are company claims not independently corroborated ^[184]. Multiple unrelated "Just Right" HVAC companies exist in other states, and one search result surfaced justrightservices.net alongside justrightservice.com with an unclear ownership relationship ^[184].

Complete fit review: Just Right Services

What this study reveals

Questions explored

• What does the AI consensus reveal about how boiler and radiant heating contractors are recommended?
• Why do most recommended boiler and radiant heating companies serve only one region?

Three structural patterns emerge from this study.

First, boiler and radiant heating is a hyper-local market in AI recommendations. Six of the seven qualifying entities serve a single metro or multi-county region: Western Washington, Marin/Sonoma County, Seattle/Puget Sound, Northwestern Pennsylvania and Western New York, southeastern Michigan, North Idaho, and Greater Boston. Only Janes Radiant Heating offers a nationwide product, and that product is a DIY kit rather than on-site labor ^[97]. A homeowner asking an AI assistant for a boiler specialist will almost always receive a regional answer.

Second, specialization language drives platform selection. Every qualifying entity advertises hydronic or radiant focus rather than general forced-air HVAC. The platforms repeatedly distinguished specialists from generalists: North Sound Boilers & Radiant's site states it focuses exclusively on high-efficiency boiler and radiant systems ^[41], and Water Heaters Unlimited explicitly declines forced-air work ^[130]. This is consistent with the research prompt, which asked for contractors who genuinely specialize in hydronic and boiler systems.

Third, evidence quality is uneven and mostly company-controlled. Across the seven entities, company-owned citations materially outnumber independent citations. Janes Radiant Heating's audit counted 35 owned versus 5 independent citations; John Owens Services 27 owned versus 12 independent; North Sound Boilers & Radiant 11 owned versus 7 independent; TJ's Plumbing & Heating, Inc. 25 owned versus 8 independent; Riviance 12 owned versus 10 independent; Water Heaters Unlimited 21 owned versus 2 independent; and Just Right Services 23 owned versus 5 independent. Buyers should treat platform recommendations as market intelligence, not independent customer reviews or proof of quality.

Where the AI Platforms Agreed

Questions explored

• Which boiler and radiant heating companies did all AI platforms agree on?
• What capabilities did AI platforms consistently attribute to the top-ranked hydronic contractors?

Platforms agreed on several points.

Janes Radiant Heating was named by all 7 platforms, the only entity to achieve that. Six of seven placed it at position 1 or 2. Platforms consistently described it as a hydronic and radiant specialist with boiler repair, radiant installation, and a nationwide DIY kit option ^[92].

Platforms consistently treated regional service limits as a real constraint rather than a disqualifier. For Janes Radiant Heating, John Owens Services, North Sound Boilers & Radiant, TJ's Plumbing & Heating, Inc., Riviance, Water Heaters Unlimited, and Just Right Services, at least one platform explicitly noted that the company cannot serve buyers outside its territory.

Platforms consistently identified combustion analysis, heat-loss calculation, and commissioning documentation as markers of a serious hydronic contractor. These appear in the evidence for Janes Radiant Heating, John Owens Services, North Sound Boilers & Radiant, TJ's Plumbing & Heating, Inc., Water Heaters Unlimited, and Just Right Services.

Platforms consistently flagged pricing opacity. For six of seven entities, at least one platform reported that no reliable public price schedule was found. Water Heaters Unlimited was the partial exception, with a published $6,500 boiler-replacement starting price ^[118].

Where the AI Platforms Disagreed

Questions explored

• Why did AI platforms rate the same boiler and radiant heating company differently?
• Which boiler and radiant heating companies received conflicting fit ratings across platforms?

Fit ratings diverged sharply for most entities, and the divergence usually tracked evidence access rather than service scope.

Janes Radiant Heating received "strong," "good," "mixed," and "uncertain" ratings across platforms. Kimi could not access the website and found no independent sources ^[91]. Deepseek rated it "mixed" for lack of independent verification ^[91].

John Owens Services received "strong" from Claude, Gemini, and Grok, but "mixed" from DeepSeek and "uncertain" from Kimi. Deepseek reported that the Eichler/slab radiant specialty referenced by the ranking stage was not independently corroborated in its sources ^[3].

TJ's Plumbing & Heating, Inc. produced the most consequential disagreement: Claude identified two separate legal entities under the same brand, one in Massachusetts and one in Pennsylvania/New York, with no evidence of common ownership ^[156]. Google and Grok rated fit "strong" for the Pennsylvania/New York entity, while DeepSeek and Kimi rated it "uncertain" ^[63].

Riviance produced a direct licensing conflict. Grok and Kimi reported a Michigan Class 7 hydronic heating license ^[52], while ChatGPT reported inconsistent license descriptions on the company's own pages and Gemini reported that a Class 7 license is not explicitly listed on the website ^[52]. Anthropic found no documented radiant floor or wall heating expertise ^[51].

Water Heaters Unlimited produced a scope conflict. Deepseek questioned whether the company performs boiler or radiant work at all, citing the water-heater-oriented name and an uncorroborated domain identity ^[118], while Grok, Kimi, and Perplexity rated fit "strong" based on the company's published boiler and hydronic pages ^[118].

Just Right Services produced an access conflict. Kimi could not access the website ^[25], while Claude, Gemini, and Grok rated fit "strong" based on documented project pages ^[34].

How to compare your options

Questions explored

• What should a homeowner check before hiring a boiler and radiant heating contractor?
• How should a buyer compare quotes from two hydronic heating specialists?

Start with geography, because it eliminates most options. Confirm the contractor's exact service area for your address before evaluating anything else. Six of the seven qualifying entities serve a single region.

Then match the contractor to your system type. If you have an Eichler or in-slab radiant system in Marin or Sonoma County, John Owens Services advertises that specific specialty ^[16]. If you have a steam boiler in southeastern Michigan, Riviance advertises steam boiler repair and replacement ^[52]. If you want annual combustion analysis in the Seattle area, North Sound Boilers & Radiant advertises it as part of its service plan ^[41]. If you want a published starting price in North Idaho, Water Heaters Unlimited publishes one ^[118].

Then verify the items platforms flagged as unclear. Ask for the contractor's current license number and classification, written heat-loss calculation, equipment model and efficiency rating, permit responsibility, commissioning procedure, labor warranty duration and exclusions, diagnostic and after-hours fees, and recent references for comparable systems. These verification items recur across the evidence for every ranked entity.

Finally, obtain at least two written quotes when the project is a replacement or a retrofit. Multiple platforms recommended competing bids, particularly for high-value boiler replacements ^[92].

For a broader directory of contractors in this category, see hvac installation and repair.

Methodology

This study used one standardized prompt sent once to each of 7 included platforms: ChatGPT, Claude, DeepSeek, Grok, Perplexity, Kimi, and Gemini. The prompt asked which providers would be recommended for a homeowner with a boiler-based or radiant heating system rather than standard forced-air ductwork, needing repair, upgrade, or replacement, and seeking a contractor who genuinely specializes in hydronic and boiler systems.

The research date was 2026-10-01. The study identified 40 unique entities across platform responses. Entities named by at least two platforms qualified for the final ranking, producing 7 qualifying entities.

Ranking order is based on platform mentions first, then average listed position, then best listed position. Platform mentions count only ranking-discovery mentions, not the number of platforms that later completed a fit assessment. The final ranking table is the sole authority for rank, platform mentions, platform share, average listed position, and best position.

Fit assessments, buyer-fit details, pricing, strengths, limitations, and disagreements come from the entity evidence bundles. Citations are platform-reported evidence, not independently verified facts. Company-owned citations materially outnumber independent citations across all seven entities.

Research limitations

Several limitations apply.

The study used one standardized prompt sent once to each included platform. AI answers can vary by date, wording, location, account state, model, interface, browsing configuration, and the sources retrieved. A single run cannot capture that variance.

Platform-reported research dates differ from the authoritative run date. Deepseek reported dates ranging from 2026-01-15 to 2026-06-11 across entities, while the authoritative run date is 2026-10-01. These platform-reported dates are provenance metadata and do not independently prove freshness.

All included platforms evaluated fit, but platform mentions count only platforms that named the entity during ranking discovery. An entity can have a completed fit assessment from a platform that did not name it during ranking.

The supplied URLs were collected from platform responses and were not independently validated by the writer stage.

Company-owned citations materially outnumber independent citations. Company claims should not be described as independently verified.

Citations are platform-reported evidence, not independently verified facts. No-search model claims require explicit verification before being described as current facts. Deepseek ran without search enabled in this study, so its claims rest on model knowledge rather than retrieved sources.

The deterministic identity audit flagged that one or more fetched domains for Water Heaters Unlimited were not corroborated by brand-name or site-identity metadata, and that company-name variants were collapsed onto one canonical brand before minimum-mentions qualification.

Platform recommendations are market intelligence, not independent customer reviews or proof of quality.

The consensus assessment

Janes Radiant Heating is the consensus leader for boiler and radiant heating service, named by all 7 platforms at an average listed position of 1.29. It is the strongest choice for Western Washington on-site work and the only qualifying entity offering a nationwide DIY hydronic kit. Its main weaknesses are regional professional coverage, limited public pricing, and a predominantly company-controlled evidence base.

For buyers outside Western Washington, the best option depends on location and system type. John Owens Services is the strongest fit for Marin and Sonoma County, particularly for Eichler and in-slab radiant systems. North Sound Boilers & Radiant is the strongest fit for Seattle/Puget Sound homeowners who want annual combustion analysis. TJ's Plumbing & Heating, Inc. is the strongest fit for Northwestern Pennsylvania and Western New York homeowners who need 24/7 availability, subject to verifying which legal entity will service the address. Riviance is the strongest fit for southeastern Michigan homeowners with older hot-water or steam boilers, subject to verifying license classification and radiant capability. Water Heaters Unlimited is the strongest fit for North Idaho homeowners and is the only entity with a published boiler-replacement starting price. Just Right Services is the strongest fit for Greater Boston homeowners needing Viessmann or hybrid radiant/radiator work.

No entity in this study should be selected without verifying licensing, insurance, warranty terms, pricing, and references directly.

Frequently Asked Questions

Which company was named by the most AI platforms for boiler and radiant heating service? Janes Radiant Heating, named by all 7 platforms studied at 100.0% share.

How many platforms were included in this study? Seven: ChatGPT, Claude, DeepSeek, Grok, Perplexity, Kimi, and Gemini.

How many entities qualified for the final ranking? Seven, out of 40 unique entities named across platform responses. The eligibility rule was at least two platform mentions.

Why do most ranked companies serve only one region? Boiler and radiant heating is a hyper-local trade. Six of the seven qualifying entities serve a single metro or multi-county area, and only Janes Radiant Heating offers a nationwide product, which is a DIY kit rather than on-site labor.

Does a higher rank mean better quality? No. Rank reflects cross-platform consensus based on platform mentions, average listed position, and best listed position. It is market intelligence, not an independent quality assessment.

Which company publishes a starting price for boiler replacement? Water Heaters Unlimited publishes a $6,500 starting price for residential boiler replacement, including near-boiler piping and a combustion analysis report.

Which company offers a nationwide DIY hydronic radiant kit? Janes Radiant Heating designs, preassembles, tests, and ships custom DIY hydronic floor heating kits nationwide with loop layouts, guides, and phone support.

What is the biggest limitation of this study? It used one standardized prompt sent once to each platform, and company-owned citations materially outnumber independent citations across all seven entities.

Sources used in this study

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165. Air Quality Engineers & Technicians Michigan (MI) Riviance HVAC - Ecohome.net: https://www.ecohome.net/professionals/130147/riviance-hvac/
166. Find professionals tagged with Heat recovery ventilation setup - Ecohome.net: https://www.ecohome.net/professionals/tag/heat-recovery-ventilation-setup/
167. John Owens Services, Inc. - Profile & Reviews - 2026: https://www.energysage.com/supplier/28809/john-owens-services-inc/
168. John Owens Services, Inc. - Profile & Reviews - EnergySage: https://www.energysage.com/supplier/29326/john-owens-services-inc/
169. Heating Repair Contractors Ann Arbor - Facebook: https://www.facebook.com/HeatingRepairContractorsAnnArbor/
170. Web Search Results for Riviance HVAC Reviews: https://www.google.com/search?q=riviance+hvac+reviews
171. TJ's Plumbing and Heating - New England Service Area: https://www.greennrg.us.com/directory/tjs-plumbing-heating-inc/
172. Default business cover photo: https://www.homeadvisor.com/rated.justright.140880402.html
173. TJ'S PLUMBING AND HEATING, INC. - Project Photos & Reviews - Foxboro, MA: https://www.houzz.com/professionals/heating-and-cooling-sales-and-repair/tj-s-plumbing-and-heating-inc-pfvwus-pf~1796230442
174. Mechanical Permit Information: https://www.michigan.gov/lara/bureau-list/bcc/sections/permit-section/permits/mechanical-permit-information
175. Review profile of Riviance HVAC: https://www.provenexpert.com/en-us/riviance-hvac/
176. North Sound Boilers & Radiant Reviews 2025: https://www.trustindex.io/reviews/northsoundboilers.com
177. JANES RADIANT HEATING - Yelp: https://www.yelp.com/biz/janes-radiant-heating-mukilteo
178. John Owens Services business listing: https://www.yelp.com/biz/john-owens-services-san-anselmo
179. JOHN OWENS SERVICES - Updated September 2026 - Yelp: https://www.yelp.com/biz/john-owens-services-san-rafael
180. JUST RIGHT SERVICES - Melrose, Massachusetts: https://www.yelp.com/biz/just-right-services-melrose-2
181. NORTH SOUND BOILERS AND RADIANT - Updated August 2025 - Yelp: https://www.yelp.com/biz/north-sound-boilers-and-radiant-monroe
182. Cost of HVAC - Last Updated August 2026 - Yelp: https://www.yelp.com/costs/boiler_services
183. TJ's Plumbing & Heating - ZoomInfo Business Overview: https://www.zoominfo.com/c/tjs-plumbing--heating-inc/356791474

Other Sources

184. Just Right Services: https://www.justrightservices.net/heating/
185. Just Right Services: https://www.justrightservices.net/hydronic-heating/