{"hq_id":"hq-p-spe-000053","name":"Fireplace and Wood Stove (Indoor Wood Burning)","category":{"primary":"specialty","secondary":"heating","tags":["fireplace","wood stove","PM2.5","PAH","indoor air quality","wood smoke"]},"product_tier":"SPE","overall_risk_level":"high","description":"Indoor fireplaces and wood-burning stoves used for heating and ambiance. Indoor wood combustion is the #1 source of residential PM2.5 in many regions. Emissions include PM2.5, PAHs, carbon monoxide, formaldehyde, benzene, and acrolein. Even EPA-certified wood stoves emit significant PM2.5 into indoor air through loading door openings and flue leaks.","synthesis":{"derived_risk_level":"moderate","synthesis_confidence":0.697,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":1.265,"vulnerability_escalated":true,"escalation_reason":"Child exposure group","compounds_resolved":5,"compounds_total":5,"synthesis_date":"2026-05-09","synthesis_version":"1.2.0","methodology_note":"exposure_modifier and adjusted_magnitude are computed from ALETHEIA-calibrated heuristics (route × duration × frequency multipliers, clamped to [0.5, 1.4]). Multipliers are directionally informed by EPA Exposure Factors Handbook (2011) and CalEPA OEHHA but are not regulatory consensus. See /api/methodology for full disclosure."},"hazard_summary":{"sensitive_populations":"children, elderly, asthmatics, pregnant women","overall_risk":"high","primary_concerns":["Indoor PM2.5 from wood combustion — cardiovascular and respiratory disease","PAH exposure (benzo[a]pyrene) — IARC Group 1 carcinogen","Carbon monoxide from incomplete combustion","Formaldehyde and acrolein — respiratory irritants"],"exposure_routes":"Inhalation of combustion products in indoor air"},"exposure":{"routes":["inhalation"],"contact_types":["inhalation"],"users":["adult","child"],"duration":"hours","frequency":"daily","scenarios":["Evening fireplace use for ambiance (2-4 hours)","Wood stove as primary heating (8-16 hours/day in winter)","Loading wood stove — door opening releases smoke burst into room","Children sleeping in rooms with wood stove heating"],"notes":"WHO: indoor wood smoke exposure is associated with COPD, lung cancer, childhood pneumonia, and low birth weight. A single evening of fireplace use can raise indoor PM2.5 to 50-200 ug/m3 (WHO guideline: 15 ug/m3). Even EPA-certified stoves allow 2.0-2.5 g/hr PM2.5 emissions."},"consumer_guidance":{"usage_warning":"Use only dry, seasoned hardwood. Ensure proper flue draft and chimney maintenance. Open damper fully before and during burning. Install CO detectors. Ensure adequate room ventilation. Avoid smoldering — hot, clean-burning fires produce fewer emissions.","safer_alternatives":["Electric fireplace (zero indoor emissions, ambiance only)","Natural gas fireplace (90% lower PM2.5 than wood)","Heat pump heating (zero indoor combustion emissions)","Pellet stove (more complete combustion than cordwood)"],"alternatives":[{"name":"Electric fireplace","notes":"zero indoor emissions, ambiance only"},{"name":"Natural gas fireplace","notes":"90% lower PM2.5 than wood"},{"name":"Heat pump heating","notes":"zero indoor combustion emissions"},{"name":"Pellet stove","notes":"more complete combustion than cordwood"}],"red_flags":[{"indicator":"Use without recommended protective equipment","meaning":"Exposure to hazardous chemicals or particles without protection.","action":"Always use appropriate PPE as specified by manufacturer or SDS."}],"green_flags":[{"indicator":"Third-party safety certification visible on packaging","meaning":"Product has been independently tested to applicable safety standards.","verification":"Look for certification logos (CPSIA, ASTM, EN, NSF, UL, OEKO-TEX)."}],"what_to_ask":[{"question":"What materials is this product made from?","why_it_matters":"Material composition determines chemical exposure potential.","good_answer":"Full material disclosure with known safe materials.","bad_answer":"No material information or unspecified."}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"OSHA workplace safety","citation":"29 CFR 1910","requirements":"PELs, SDS requirements, PPE mandates.","compliance_status":null,"effective_date":null,"enforcing_agency":"OSHA","penalties":null,"source_ref":null},{"jurisdiction":"USA","regulation":"EPA (TSCA/RCRA/FIFRA as applicable)","citation":null,"requirements":"Chemical reporting, hazardous waste, pesticide registration as applicable.","compliance_status":null,"effective_date":null,"enforcing_agency":"EPA","penalties":null,"source_ref":null}],"certifications":[],"labeling":{"required_disclosures":[],"prop65_warning":{"required":null,"chemicals":[],"endpoint":null,"notes":null},"ghs_labeling":{"required":null,"signal_word":null,"pictograms":[],"hazard_statements":[],"notes":null},"hidden_ingredients":{"trade_secret_protected":null,"categories_hidden":[],"estimated_count":null,"known_concerns":null,"notes":null},"notes":null},"recalls":[],"regulatory_gap":null,"notes":null},"lifecycle":{"recyclable":true,"disposal_guidance":"Cast iron/steel stoves recyclable as scrap metal. Cool ash before disposal.","hazardous_waste":false,"expected_lifespan":"10-30_years"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-org-000029","name":"Benzo[a]pyrene","role":"combustion_product","concentration_pct":"trace"},{"hq_id":"hq-c-org-000043","name":"Carbon monoxide","role":"combustion_product","concentration_pct":"trace"},{"hq_id":"hq-c-org-000011","name":"Formaldehyde","role":"combustion_product","concentration_pct":"trace"},{"hq_id":"hq-c-org-000010","name":"Benzene","role":"combustion_product","concentration_pct":"trace"},{"hq_id":"hq-c-org-000035","name":"Acrolein","role":"combustion_product","concentration_pct":"trace"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000029","compound_name":null,"role":"combustion_product","typical_concentration":"trace"},{"hq_id":"hq-c-org-000043","compound_name":null,"role":"combustion_product","typical_concentration":"10-100 ppm"},{"hq_id":"hq-c-org-000011","compound_name":null,"role":"combustion_product","typical_concentration":"trace"},{"hq_id":"hq-c-org-000010","compound_name":null,"role":"combustion_product","typical_concentration":"trace"},{"hq_id":"hq-c-org-000035","compound_name":null,"role":"combustion_product","typical_concentration":"trace"}],"identifiers":{"common_names":["fireplace and wood stove (indoor wood burning)"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Regency","manufacturer":"FPI Fireplace Products","market_position":"premium","notable":"Premium wood stove brand"},{"brand":"Vermont Castings","manufacturer":"HHT","market_position":"premium","notable":"Classic cast iron wood stoves"},{"brand":"Duraflame","manufacturer":"Duraflame","market_position":"mass_market","notable":"Firelogs and fireplace products"}],"brand_examples_disclaimer":"Representative branded products of this category. Concerning ingredients listed in materials.concerning[] apply to the category, not necessarily to every named brand. Specific formulations vary by SKU and may have changed since this record was written; consult the brand's current ingredient label before drawing brand-level conclusions.","sources":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-25"},{"type":"regulation","title":"OSHA workplace safety (29 CFR 1910)","jurisdiction":"USA","citation":"29 CFR 1910","id":"src_0358de26"},{"type":"regulation","title":"EPA (TSCA/RCRA/FIFRA as applicable)","jurisdiction":"USA","id":"src_e10425f0"},{"id":"iarc_100f_bap","type":"regulatory","title":"IARC Monographs Volume 100F: Benzo[a]pyrene — Chemical Agents and Related Occupations","year":2012,"inherited_from_compound":"hq-c-org-000029"},{"id":"epa_bap_iris","type":"regulatory","title":"US EPA IRIS: Benzo[a]pyrene — Toxicological Review (Final)","year":2017,"inherited_from_compound":"hq-c-org-000029"},{"id":"cdc_co_poisoning","type":"report","title":"CDC: Carbon Monoxide Poisoning — Facts and Prevention","year":2023,"inherited_from_compound":"hq-c-org-000043"},{"id":"atsdr_co","type":"report","title":"ATSDR Toxicological Profile for Carbon Monoxide","year":2012,"inherited_from_compound":"hq-c-org-000043"},{"id":"iarc_100f_form","type":"regulatory","title":"IARC Monographs Volume 100F: Formaldehyde","year":2012,"inherited_from_compound":"hq-c-org-000011"},{"id":"epa_form_iris","type":"regulatory","title":"US EPA IRIS Assessment: Formaldehyde (draft)","year":2010,"inherited_from_compound":"hq-c-org-000011"},{"id":"iarc_100f","type":"regulatory","title":"IARC Monographs Volume 100F: Benzene","year":2012,"inherited_from_compound":"hq-c-org-000010"},{"id":"epa_benzene_iris","type":"regulatory","title":"US EPA IRIS Assessment: Benzene","year":1998,"inherited_from_compound":"hq-c-org-000010"},{"id":"iarc_63_acrolein","type":"regulatory","title":"IARC Monographs Volume 63: Acrolein","year":1995,"inherited_from_compound":"hq-c-org-000035"},{"id":"epa_acrolein_iris","type":"regulatory","title":"US EPA IRIS: Acrolein — Provisional Toxicological Review (External Review Draft)","year":2003,"inherited_from_compound":"hq-c-org-000035"},{"type":"regulatory","title":"US Environmental Protection Agency (EPA)","jurisdiction":"USA","id":"src_defdd418","extraction":"description_reference"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:24:02.589Z"}}