{"citations":{"source_mix":{"company_owned":29,"independent":39,"unclear":0},"sources_referenced_by_questions":0,"support_mix":{"direct":62,"partial":6},"total_sources":68,"unique_domain_count":28},"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","deepseek","google","grok","openai"],"predicate":"final_consensus_rank","qualifier":"air quality and duct cleaning","subject":"DUCTZ","unit":"rank","value":1},{"claim_id":"claim-003","confidence":"verified","observed_at":"2026-10-01","platform_support":["anthropic","deepseek","google","grok","openai"],"predicate":"platform_mentions","qualifier":"out of 7","subject":"DUCTZ","unit":"platforms","value":5},{"claim_id":"claim-004","confidence":"verified","observed_at":"2026-10-01","platform_support":["grok","google"],"predicate":"fit_rating_count","qualifier":"strong","subject":"DUCTZ","unit":"platforms","value":2},{"claim_id":"claim-005","confidence":"verified","observed_at":"2026-10-01","platform_support":["openai","anthropic","perplexity","kimi"],"predicate":"fit_rating_count","qualifier":"good","subject":"DUCTZ","unit":"platforms","value":4},{"claim_id":"claim-006","confidence":"verified","observed_at":"2026-10-01","platform_support":["deepseek"],"predicate":"fit_rating_count","qualifier":"mixed","subject":"DUCTZ","unit":"platforms","value":1}],"content_scope":"aggregated facts, computed metrics, and retrieval summaries","entities":[{"average_rank":2.2,"best_rank":1,"entity_id":"entity-001","entity_type":"company","final_rank":1,"name":"DUCTZ","platform_mentions":5,"platform_share":0.7142857142857143}],"identity":{"dataset_url":"https://homeservicesconsensusindex.com/datasets/hvac-installation-and-repair/air-quality-duct-cleaning/ductz.json","page_url":"https://homeservicesconsensusindex.com/hvac-installation-and-repair/air-quality-duct-cleaning/ductz","report_type":"fit_review","study_id":"HSCI-STUDY-40113AF5750A","title":"DUCTZ 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.","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 02:21:48.701984+00","research_date":"2026-10-01","source_snapshot_sha256":"f86f329e72205de5970f7f7e334cb8f587a146b6071e07df14ef5420d6fa3913","verification_scope":"public_verification"},"ranking":{"candidates_evaluated":31,"qualified_finalists":7,"ranking_unit":"HVAC contractor or company brand"},"schema_version":4,"summary":"DUCTZ is a good but franchise-dependent fit for air quality and duct cleaning. Five of the seven platforms in this study named DUCTZ during the ranking stage, and it finished first overall with an average listed rank of 2.2 and a best rank of 1. The strongest reason to consider it is a broad residential scope that pairs NADCA-aligned duct and HVAC cleaning with optional in-duct IAQ equipment, including UV-C and activated carbon, plus before-and-after photo documentation at many locations . The main limitation is that DUCTZ is a franchise network: certifications, service menus, 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"}}