{"citations":{"source_mix":{"company_owned":20,"independent":13,"unclear":5},"sources_referenced_by_questions":0,"support_mix":{"direct":26,"partial":11},"total_sources":38,"unique_domain_count":15},"claims":[{"claim_id":"claim-001","confidence":"verified","observed_at":"2026-10-01","platform_support":["anthropic","deepseek","google","grok","kimi","openai","perplexity"],"predicate":"platforms_analyzed","qualifier":"valid included platform responses","subject":"Best Whole Home Air Quality and Duct Cleaning Specialists","unit":"platforms","value":7},{"claim_id":"claim-002","confidence":"verified","observed_at":"2026-10-01","platform_support":["anthropic","kimi","perplexity"],"predicate":"final_consensus_rank","qualifier":"air quality and duct cleaning","subject":"DD Air Duct Cleaning","unit":"rank","value":4},{"claim_id":"claim-003","confidence":"verified","observed_at":"2026-10-01","platform_support":["anthropic","kimi","perplexity"],"predicate":"platform_mentions","qualifier":"out of 7","subject":"DD Air Duct Cleaning","unit":"platforms","value":3},{"claim_id":"claim-004","confidence":"verified","observed_at":"2026-10-01","platform_support":["anthropic"],"predicate":"fit_rating_count","qualifier":"good","subject":"DD Air Duct Cleaning","unit":"platforms","value":1},{"claim_id":"claim-005","confidence":"verified","observed_at":"2026-10-01","platform_support":["openai","grok","google"],"predicate":"fit_rating_count","qualifier":"mixed","subject":"DD Air Duct Cleaning","unit":"platforms","value":3},{"claim_id":"claim-006","confidence":"verified","observed_at":"2026-10-01","platform_support":["deepseek","perplexity","kimi"],"predicate":"fit_rating_count","qualifier":"uncertain","subject":"DD Air Duct Cleaning","unit":"platforms","value":3}],"content_scope":"aggregated facts, computed metrics, and retrieval summaries","entities":[{"average_rank":4,"best_rank":3,"entity_id":"entity-001","entity_type":"company","final_rank":4,"name":"DD Air Duct Cleaning","platform_mentions":3,"platform_share":0.42857142857142855}],"identity":{"dataset_url":"https://homeservicesconsensusindex.com/datasets/hvac-installation-and-repair/air-quality-duct-cleaning/dd-air-duct-cleaning.json","page_url":"https://homeservicesconsensusindex.com/hvac-installation-and-repair/air-quality-duct-cleaning/dd-air-duct-cleaning","report_type":"fit_review","study_id":"HSCI-STUDY-3A5EEAB9C7BF","title":"DD Air Duct Cleaning Review for air quality and duct cleaning"},"limitations":["Use the run researchdate as the study date. Platform-reported dates are provenance metadata and do not independently prove freshness.","All included platforms evaluated fit, but platformmentions counts only platforms that named the entity during ranking discovery.","Do not resolve conflicting product names, pricing, or capabilities by guessing; describe the conflict and tell buyers what to verify.","The supplied URLs were collected from platform responses and were not independently validated by the writer stage.","Company-owned citations materially outnumber independent citations; do not describe company claims as independently verified.","Platform-reported research dates differ from the authoritative run date; disclose this as a methodology limitation.","The deterministic identity audit contains qualification notes that must be disclosed where relevant.","Citations are platform-reported evidence, not independently verified facts. No-search model claims require explicit verification before being described as current facts."],"methodology":{"fit_rating_contract":["strong","good","mixed","weak","uncertain"],"included_valid_platform_count":7,"maximum_finalists":10,"minimum_mentions":2,"name":"Home Services Consensus Index cross-platform AI consensus analysis","platforms_included":["anthropic","deepseek","google","grok","kimi","openai","perplexity"],"platforms_queried":["openai","anthropic","deepseek","grok","perplexity","kimi","google"],"stages":["ranking_discovery","fit_assessment","normalization","editorial_synthesis"],"version":"alias-table-1"},"provenance":{"generated_at":"2026-10-01 02:27:44.831016+00","research_date":"2026-10-01","source_snapshot_sha256":"5390a39bf1726359c9c01ed6976704fa44c3cfc0ca0cf92aa40b4f6ff4870198","verification_scope":"public_verification"},"ranking":{"candidates_evaluated":31,"qualified_finalists":7,"ranking_unit":"HVAC contractor or company brand"},"schema_version":4,"summary":"DD Air Duct Cleaning is a mixed fit for air quality and duct cleaning. Three of seven platforms named it during ranking discovery (anthropic, kimi, perplexity), a 42.9% share, at an average listed rank of 4.0 and best rank of 3. The strongest reason to consider it is its advertised combination of HEPA-filtered source-removal duct cleaning, optional EPA-registered sanitization, and claimed NADCA-certified technicians, which maps directly to allergy-focused duct cleaning (, -7). The main limitation is that no platform found independent confirmation of NADCA certification, IAQ equipment…","target_buyer":"A homeowner dealing with allergy, asthma, or air quality concerns who wants professional duct cleaning and indoor air quality equipment installed.","topic":{"base_category":"HVAC Installation and Repair","category_criteria":["duct cleaning thoroughness","IAQ equipment installation expertise","mold and allergen remediation","certification and testing capability"],"geography":"United States","slug":"best-whole-home-air-quality-and-duct-cleaning-specialists","title":"Best Whole Home Air Quality and Duct Cleaning Specialists","use_case":"air quality and duct cleaning"}}