{"url":"https://whatshealthyandwhy.com/gas-stoves/are-gas-stoves-bad-for-your-health","path":"/gas-stoves/are-gas-stoves-bad-for-your-health","alternates":{"json":"https://whatshealthyandwhy.com/api/articles/gas-stoves/are-gas-stoves-bad-for-your-health.json","markdown":"https://whatshealthyandwhy.com/gas-stoves/are-gas-stoves-bad-for-your-health.md"},"topic":{"slug":"gas-stoves","name":"Gas Stoves","url":"https://whatshealthyandwhy.com/gas-stoves"},"slug":"are-gas-stoves-bad-for-your-health","order":1,"title":"Are Gas Stoves Bad for Your Health?","question":"Are gas stoves bad for your health?","answer":"Gas stoves likely raise indoor nitrogen dioxide and childhood asthma risk; ventilating every time you cook, or switching to induction, lowers exposure.","description":"Gas stoves release nitrogen dioxide, benzene and methane. What studies show about childhood asthma, how well range hoods work, and what to do about it.","confidence":3,"confidenceNote":"Emission measurements are solid and the asthma link is consistent across 41 studies, but it is observational; only one small uncontrolled study tests a stove swap.","evidenceSummary":{"rctCount":2,"observationalCount":3,"metaAnalysisCount":1,"totalParticipants":"1,800+","replicated":true,"newestStudyYear":2026},"category":{"categoryTitle":"What's Harming You","categorySlug":"harming-you","subcategoryName":"Your Home","subcategorySlug":"home","url":"https://whatshealthyandwhy.com/explore/harming-you/home"},"actions":["Run a range hood that vents outdoors, on high, every time you cook, and use the back burners when you can [4].","No ducted hood? Open a window and run any exhaust fan while you cook and for a few minutes afterward [1].","Replacing a stove? Induction or electric removes the combustion source: in one randomized trial, swapping out an unvented gas stove cut kitchen nitrogen dioxide by about half [5]."],"cautions":["People with asthma or COPD, including children, are most affected by nitrogen dioxide: do not change asthma medicines on your own; tell your clinician if symptoms flare when cooking [6].","Modelling shows carbon monoxide can top short-term guidelines without a hood [7]: with headache, dizziness or nausea while cooking, get fresh air and call your doctor; fit a CO alarm."],"simpleText":"Gas stoves are a modest but real source of indoor air pollution. Burning gas releases nitrogen dioxide, a lung irritant, plus benzene and some unburned methane [1][2]. Across 41 studies, children in homes that cook with gas had about 32% higher odds of asthma, which shows a link rather than proof of cause [3]. A hood that vents outdoors helps, and switching to electric or induction removes the source [4][5].","mediumText":"How it works\n\nWhat the flame puts in your air. Burning gas forms nitrogen oxides, and the amount rises in step with the gas burned. In a smaller kitchen where nobody uses the hood, nitrogen dioxide (NO2) can pass the 1-hour U.S. outdoor standard of 100 parts per billion (ppb) within a few minutes of cooking [1]. A simulation of Southern California homes put the typical peak hourly rise at about 100 ppb, and estimated that 62% of people in gas-cooking homes without hoods were routinely above acute NO2 guidelines [7]. Gas flames also make benzene: in 87 homes, burners on high and ovens at 350°F released 10 to 25 times more than electric coil or radiant tops, and induction released none that could be detected [2]. Unburned methane, a greenhouse gas, escapes too, mostly while the stove is off [1].\n\nWhat it does to lungs. NO2 irritates the airways. Children with asthma had more wheeze, night symptoms and rescue-inhaler use as household NO2 rose, even at levels well below the outdoor standard [6]. One analysis estimated that about 13% of U.S. childhood asthma could be attributed to gas stoves if the link is causal [8]. In national survey data, children whose parents used ventilation while cooking on gas had about 40% lower odds of wheeze [9].\n\nHoods are not all equal. Of 15 installed hoods and fans, 10 moved 70% or less of their rated airflow. At least 200 cubic feet per minute (cfm) was needed to capture 75% of front-burner fumes, and even that was not always enough. All 14 units tested for noise topped 56 decibels on high, and back burners were captured better than front ones [4]. For fine particles from stir-frying, capture was only 3 to 11% on low and 16 to 70% on high [10].\n\nRanked fixes, cheapest first\n\n1. Run a hood that vents outdoors every time, on high, using back burners first [4][10].\n2. No ducted hood: open a window and run any exhaust fan during and after cooking [1].\n3. When replacing the stove, choose induction or electric. In a randomized trial, swapping an unvented gas stove for electric cut median kitchen NO2 by 51% and bedroom NO2 by 42% after three months [5].\n4. A purifier with HEPA and carbon filters cut kitchen NO2 by about 20 to 27%. Treat it as a backup, not a fix; a HEPA filter alone catches particles, not gases [5]. See air purifiers and filters and common indoor pollutants.","deepText":"The evidence in detail\n\nExposure studies. Lebel and colleagues measured methane in 53 homes and nitrogen oxides in 32. Nitrogen oxide emissions tracked the gas burned closely (r² = 0.76), and 0.8 to 1.3% of the gas used escaped unburned, over three-quarters of it while the stove was off [1]. Kashtan and colleagues then measured benzene in 87 homes in California and Colorado: gas and propane burners released 2.8 to 6.5 µg per minute, and in some homes bedroom benzene stayed above chronic health benchmarks for hours after the stove was off [2]. Logue and colleagues simulated Southern California homes; without hoods, 62% of occupants were routinely above acute NO2 guidelines, 9% above carbon monoxide guidelines and 53% above formaldehyde guidelines [7]. These are convenience samples and a model, not a random sample of homes, and none of them measured illness.\n\nAssociation with asthma. Lin and colleagues pooled 41 population studies: gas cooking went with higher odds of asthma (OR 1.32, 95% CI 1.18 to 1.48), with no sign of publication bias [3]. Belanger and colleagues followed 1,342 children aged 5 to 10 with active asthma for a year, measuring NO2 in each home. Each 5-fold rise above 6 ppb went with higher odds of a worse severity score (OR 1.37), wheeze (1.49), night symptoms (1.52) and rescue medication use (1.78) [6]. Kile and colleagues studied NHANES III children living with gas stoves: parent-reported ventilation went with lower odds of asthma (OR 0.64), wheeze (0.60) and bronchitis (0.60) [9]. Gruenwald and colleagues applied an odds ratio of 1.34 to national housing survey data and estimated that 12.7% (95% CI 6.3 to 19.3%) of current childhood asthma is attributable to gas stoves, with higher state figures in Illinois (21.1%) and California (20.1%) [8].\n\nDoes fixing it help? Paulin and colleagues randomly assigned homes with unvented gas stoves to a stove swap, a new vented hood or HEPA-plus-carbon purifiers, and measured NO2 a week before and a week and three months after. Replacement cut median NO2 by 51% in the kitchen and 42% in the bedroom. Purifiers cut it 27% and 22% at first, but by three months only the kitchen drop (20%) was still significant. The hood made no significant difference [5]. That trial measured NO2, not symptoms. Sehgal and colleagues (2026) replaced gas stoves with electric ones in the homes of 85 people with poorly controlled asthma. Two to three months later their asthma control score had improved from 2.6 to 1.5, emergency visits or admissions in the past four weeks had fallen from 11.8% to 3.5%, and NO2 had fallen from 21.0 to 6.3 ppb [11]. With no control group, regression to the mean (people were enrolled when their asthma was bad), season and expectation cannot be ruled out; the authors call for a controlled trial [11]. The nearest randomized health evidence comes from school heaters. Marks and colleagues ran a double-blind, cluster-randomized crossover study in 400 children at 22 schools and found that unflued gas heaters raised classroom NO2 1.8-fold and went with more evening cough (OR 1.16) and morning wheeze (OR 1.38), with no change in lung function [12].\n\nWhat does not line up. In the meta-analysis NO2 itself was not significantly tied to asthma (OR 1.09 per 15 ppb, 95% CI 0.91 to 1.31), though it was tied to wheeze (OR 1.15). So NO2 may stand in for other combustion products, or for differences in housing and income [3]. The ventilation finding is cross-sectional and parent-reported [9]. The hood arm of the randomized trial did not lower NO2, a reminder that hoods help only if they capture well and are actually used [4][5]. Attributable-fraction estimates assume the link is causal [8]. And no long-term trial has tested whether swapping a stove prevents asthma.\n\nBottom line (moderate confidence). Gas stoves reliably add NO2, benzene and other pollutants to home air, and their link with childhood asthma is consistent but modest. Induction lowers exposure, and ventilation probably helps when it is used. The direct health payoff of a swap still rests on one uncontrolled study and indirect trials, so a stove swap is a reasonable choice at replacement time, not an emergency.","deepTruncated":false,"references":[{"id":"1","title":"Methane and NO(x) Emissions from Natural Gas Stoves, Cooktops, and Ovens in Residential Homes","authors":"Lebel ED, Finnegan CJ, Ouyang Z, et al.","year":2022,"journal":"Environ Sci Technol","pmid":"35081712","url":"https://pubmed.ncbi.nlm.nih.gov/35081712/"},{"id":"2","title":"Gas and Propane Combustion from Stoves Emits Benzene and Increases Indoor Air Pollution","authors":"Kashtan YS, Nicholson M, Finnegan C, et al.","year":2023,"journal":"Environ Sci Technol","pmid":"37319002","url":"https://pubmed.ncbi.nlm.nih.gov/37319002/"},{"id":"3","title":"Meta-analysis of the effects of indoor nitrogen dioxide and gas cooking on asthma and wheeze in children","authors":"Lin W, Brunekreef B, Gehring U","year":2013,"journal":"Int J Epidemiol","pmid":"23962958","url":"https://pubmed.ncbi.nlm.nih.gov/23962958/"},{"id":"4","title":"Performance of installed cooking exhaust devices","authors":"Singer BC, Delp WW, Price PN, et al.","year":2012,"journal":"Indoor Air","pmid":"22044446","url":"https://pubmed.ncbi.nlm.nih.gov/22044446/"},{"id":"5","title":"Home interventions are effective at decreasing indoor nitrogen dioxide concentrations","authors":"Paulin LM, Diette GB, Scott M, et al.","year":2014,"journal":"Indoor Air","pmid":"24329966","url":"https://pubmed.ncbi.nlm.nih.gov/24329966/"},{"id":"6","title":"Household levels of nitrogen dioxide and pediatric asthma severity","authors":"Belanger K, Holford TR, Gent JF, et al.","year":2013,"journal":"Epidemiology","pmid":"23337243","url":"https://pubmed.ncbi.nlm.nih.gov/23337243/"},{"id":"7","title":"Pollutant exposures from natural gas cooking burners: a simulation-based assessment for Southern California","authors":"Logue JM, Klepeis NE, Lobscheid AB, et al.","year":2014,"journal":"Environ Health Perspect","pmid":"24192135","url":"https://pubmed.ncbi.nlm.nih.gov/24192135/"},{"id":"8","title":"Population Attributable Fraction of Gas Stoves and Childhood Asthma in the United States","authors":"Gruenwald T, Seals BA, Knibbs LD, et al.","year":2022,"journal":"Int J Environ Res Public Health","pmid":"36612391","url":"https://pubmed.ncbi.nlm.nih.gov/36612391/"},{"id":"9","title":"A cross-sectional study of the association between ventilation of gas stoves and chronic respiratory illness in U.S. children enrolled in NHANESIII","authors":"Kile ML, Coker ES, Smit E, et al.","year":2014,"journal":"Environ Health","pmid":"25182545","url":"https://pubmed.ncbi.nlm.nih.gov/25182545/"},{"id":"10","title":"Capture efficiency of cooking-related fine and ultrafine particles by residential exhaust hoods","authors":"Lunden MM, Delp WW, Singer BC","year":2015,"journal":"Indoor Air","pmid":"24750219","url":"https://pubmed.ncbi.nlm.nih.gov/24750219/"},{"id":"11","title":"Asthma Control Before and After Changing Gas Stoves to Electric Stoves","authors":"Sehgal AR, Schuellerman P, Dolata J, et al.","year":2026,"journal":"J Allergy Clin Immunol Pract","pmid":"42398761","url":"https://pubmed.ncbi.nlm.nih.gov/42398761/"},{"id":"12","title":"Respiratory health effects of exposure to low-NOx unflued gas heaters in the classroom: a double-blind, cluster-randomized, crossover study","authors":"Marks GB, Ezz W, Aust N, et al.","year":2010,"journal":"Environ Health Perspect","pmid":"20663737","url":"https://pubmed.ncbi.nlm.nih.gov/20663737/"}],"wordCount":1178,"source":{"path":"src/content/topics/gas-stoves/are-gas-stoves-bad-for-your-health.md"},"citeAs":"“Are gas stoves bad for your health?.” What's Healthy and Why. https://whatshealthyandwhy.com/gas-stoves/are-gas-stoves-bad-for-your-health","notice":"General information backed by peer-reviewed research, not medical advice."}