{"id":80970,"date":"2023-02-24T13:55:48","date_gmt":"2023-02-24T21:55:48","guid":{"rendered":"https:\/\/www.redfin.com\/blog\/?p=80970"},"modified":"2023-05-10T10:43:16","modified_gmt":"2023-05-10T17:43:16","slug":"what-causes-carbon-monoxide-in-a-house","status":"publish","type":"post","link":"https:\/\/www.redfin.com\/blog\/what-causes-carbon-monoxide-in-a-house\/","title":{"rendered":"What Causes Carbon Monoxide in a House?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Carbon monoxide (CO) is a common <\/span><a href=\"https:\/\/www.cdc.gov\/nceh\/features\/copoisoning\/index.html\" target=\"_blank\" rel=\"noopener external noreferrer\" data-wpel-link=\"external\"><span style=\"font-weight: 400;\">indoor air pollutant<\/span><\/a><span style=\"font-weight: 400;\"> present throughout homes in the U.S. and it poses a significant health risk to homeowners and renters. Every year, <\/span><a href=\"https:\/\/www.cdc.gov\/nceh\/features\/copoisoning\/index.html\" target=\"_blank\" rel=\"noopener external noreferrer\" data-wpel-link=\"external\"><span style=\"font-weight: 400;\">more than 100,000 people<\/span><\/a><span style=\"font-weight: 400;\"> visit emergency departments due to accidental CO poisoning, usually during colder months. Common causes of carbon monoxide include gas appliances, wood-burning fireplaces, and idling cars.\u00a0\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Luckily, CO poisoning is often preventable. There are easy steps you can take to reduce your risk at home, regardless of your living situation. Whether you reside in a <\/span><a href=\"https:\/\/www.redfin.com\/city\/1826\/MA\/Boston\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"exclude\"><span style=\"font-weight: 400;\">house in Boston<\/span><\/a><span style=\"font-weight: 400;\"> or rent an <\/span><a href=\"https:\/\/www.redfin.com\/city\/30823\/TX\/Round-Rock\/apartments-for-rent\" target=\"_blank\" rel=\"noopener\" data-wpel-link=\"exclude\"><span style=\"font-weight: 400;\">apartment in Round Rock, TX<\/span><\/a><span style=\"font-weight: 400;\">, read on to learn what causes carbon monoxide in a house and how to prevent it.\u00a0\u00a0<\/span><\/p>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\" wp-image-80973 aligncenter\" src=\"https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-184113951.jpg\" alt=\"Carbon monoxide detector\" width=\"843\" height=\"562\" srcset=\"https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-184113951.jpg 1200w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-184113951-300x200.jpg 300w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-184113951-1024x683.jpg 1024w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-184113951-768x512.jpg 768w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-184113951-225x150.jpg 225w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-184113951-945x630.jpg 945w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-184113951-450x300.jpg 450w\" sizes=\"(max-width: 843px) 100vw, 843px\" \/><\/p>\n<h2><span style=\"font-weight: 400;\">What is carbon monoxide?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Carbon monoxide is a colorless, odorless, and tasteless gas that is toxic to humans and animals. It forms during incomplete combustion (without enough oxygen) of carbon-based fuels, such as gasoline, <a href=\"https:\/\/www.redfin.com\/blog\/what-is-natural-gas\/\" data-wpel-link=\"exclude\">natural gas<\/a>, propane, and wood. It\u2019s a dangerous <\/span><a href=\"https:\/\/nj.gov\/health\/eoh\/rtkweb\/documents\/fs\/0345.pdf\" data-wpel-link=\"external\" target=\"_blank\" rel=\"external noopener noreferrer\"><span style=\"font-weight: 400;\">flammable gas<\/span><\/a><span style=\"font-weight: 400;\"> that can be explosive in large quantities.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Carbon monoxide is also harmful when inhaled because it reduces the amount of oxygen blood can transport throughout the body, which can lead to poisoning.\u00a0<\/span><\/p>\n<p><b>Natural gas leaks are the primary source of carbon monoxide in most homes.<\/b><\/p>\n<h3><span style=\"font-weight: 400;\">Symptoms of carbon monoxide poisoning<\/span><\/h3>\n<p><a href=\"https:\/\/www.pennmedicine.org\/for-patients-and-visitors\/patient-information\/conditions-treated-a-to-z\/carbon-monoxide-poisoning#:~:text=Carbon%20monoxide%20is%20a%20chemical,%2C%20fires%2C%20and%20factory%20emissions.\" target=\"_blank\" rel=\"noopener external noreferrer\" data-wpel-link=\"external\"><span style=\"font-weight: 400;\">Carbon monoxide poisoning<\/span><\/a><span style=\"font-weight: 400;\"> affects everyone differently, but the most common symptoms are:\u00a0<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Chest pain<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Confusion<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Convulsions<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Dizziness<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Fatigue<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Headaches<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Nausea<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Vomiting<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">In severe cases, CO poisoning can be fatal. This is why it\u2019s essential to prevent carbon monoxide from entering your home and to detect it as soon as possible if it does. <\/span><a href=\"https:\/\/www.epa.gov\/co-pollution\/basic-information-about-carbon-monoxide-co-outdoor-air-pollution#What%20is%20CO\" target=\"_blank\" rel=\"noopener external noreferrer\" data-wpel-link=\"external\"><span style=\"font-weight: 400;\">Inhaling carbon monoxide outdoors<\/span><\/a><span style=\"font-weight: 400;\"> is also a concern for those with heart disease.\u00a0<\/span><\/p>\n<p><i><span style=\"font-weight: 400;\">If you detect any signs of carbon monoxide in your house or think you have been exposed, contact your local utility provider or call 911 immediately.<\/span><\/i><\/p>\n<p><img decoding=\"async\" class=\" wp-image-80972 aligncenter\" src=\"https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-170592290.jpg\" alt=\"what-causes-carbon-monoxide-in-a-house-2\" width=\"842\" height=\"542\" srcset=\"https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-170592290.jpg 1200w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-170592290-300x193.jpg 300w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-170592290-1024x659.jpg 1024w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-170592290-768x494.jpg 768w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-170592290-233x150.jpg 233w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-170592290-979x630.jpg 979w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-170592290-466x300.jpg 466w\" sizes=\"(max-width: 842px) 100vw, 842px\" \/><\/p>\n<h2><span style=\"font-weight: 400;\">What causes carbon monoxide in a house?<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Anything that uses a carbon-based fuel source can produce carbon monoxide. Here are <\/span><a href=\"https:\/\/www.cdc.gov\/co\/faqs.htm\" target=\"_blank\" rel=\"noopener external noreferrer\" data-wpel-link=\"external\"><span style=\"font-weight: 400;\">the most common sources<\/span><\/a><span style=\"font-weight: 400;\"> of carbon monoxide in a house.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">1. Faulty or improperly installed heating systems<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">If your heating system isn\u2019t working correctly, it can produce CO. This can occur if there is a blockage in the chimney or flue or if the furnace doesn\u2019t vent correctly.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">2. Gas appliances<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Poorly ventilated appliances are the most common cause of carbon monoxide buildup. Gas appliances, including <\/span><a href=\"https:\/\/www.redfin.com\/blog\/gas-vs-electric-stove\/\" data-wpel-link=\"exclude\"><span style=\"font-weight: 400;\">stoves<\/span><\/a><span style=\"font-weight: 400;\">, <\/span><a href=\"https:\/\/www.redfin.com\/blog\/gas-vs-electric-dryer\/\" data-wpel-link=\"exclude\"><span style=\"font-weight: 400;\">dryers<\/span><\/a><span style=\"font-weight: 400;\">, fireplaces, and water heaters, all produce CO if they aren\u2019t properly installed or if there is a blockage in the exhaust vent. Gas stoves also produce low levels of carbon monoxide when set to a low setting during regular use.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">3. Wood-burning stoves and fireplaces<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Burning wood is especially dirty and can cause serious health concerns if your chimney isn\u2019t functioning correctly. Make sure never to get too close to an open flame as well.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">4. Portable generators<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Using a portable generator inside your home, garage, or other enclosed space can quickly produce dangerous levels of CO. Never use a portable generator indoors.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">5. Blocked or clogged chimneys<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Blockages in chimneys, flues, or vents can prevent gas from filtering outdoors, causing a buildup indoors.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">6. Smoking indoors<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Smoking cigarettes, cigars, or pipes indoors also <\/span><a href=\"https:\/\/nj.gov\/health\/eoh\/rtkweb\/documents\/fs\/0345.pdf\" data-wpel-link=\"external\" target=\"_blank\" rel=\"external noopener noreferrer\"><span style=\"font-weight: 400;\">increases exposure to carbon monoxide<\/span><\/a><span style=\"font-weight: 400;\">. Because smoking can cause heart and lung issues, it may worsen symptoms of CO exposure.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">7. Automobile exhaust<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Running a car engine in an enclosed space, such as a garage, produces dangerous levels of carbon monoxide, which can quickly become deadly.\u00a0<\/span><\/p>\n<p><img decoding=\"async\" class=\" wp-image-80974 aligncenter\" src=\"https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-1389664273.jpg\" alt=\"what-causes-carbon-monoxide-in-a-house-3\" width=\"821\" height=\"462\" srcset=\"https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-1389664273.jpg 1200w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-1389664273-300x169.jpg 300w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-1389664273-1024x576.jpg 1024w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-1389664273-768x432.jpg 768w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-1389664273-267x150.jpg 267w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-1389664273-1120x630.jpg 1120w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-1389664273-533x300.jpg 533w\" sizes=\"(max-width: 821px) 100vw, 821px\" \/><\/p>\n<h2><span style=\"font-weight: 400;\">How to prevent carbon monoxide in your home<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Preventing carbon monoxide from entering your home is the best way to reduce your risk of exposure. <\/span><a href=\"https:\/\/www.lung.org\/clean-air\/at-home\/indoor-air-pollutants\/carbon-monoxide\" target=\"_blank\" rel=\"noopener external noreferrer\" data-wpel-link=\"external\"><span style=\"font-weight: 400;\">Here are a few tips<\/span><\/a><span style=\"font-weight: 400;\"> to help.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">1. Install carbon monoxide detectors<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Install battery-operated or hardwired carbon monoxide detectors near where you sleep and throughout your home to alert you to dangerous gas levels. Change the batteries twice yearly, and replace them every ten years or when their end-of-life signals sound.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">2. Maintain and inspect heating systems<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Have a qualified technician inspect and maintain your heating systems, including furnaces, boilers, and chimneys, to ensure proper ventilation and safe operation.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">3. Ventilate gas appliances\u00a0<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Use gas stoves, dryers, water heaters, and furnaces in well-ventilated areas, and make sure they\u2019re installed correctly. Horizontal vent pipes for appliances, such as a water heater, should go up slightly as they go outside.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Never use a gas range to heat your home; it\u2019s inefficient and dangerous.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">4. Avoid using portable generators indoors<\/span><\/h3>\n<p><b>Never use a portable gas generator inside your home, garage, or less than 20 feet from any window, door, or vent. <\/b><span style=\"font-weight: 400;\">If you must use a generator indoors, such as for medical appliances during a power outage, use only battery powered options that are explicitly approved for indoor use.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">5. Keep chimneys and flues clear<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Keep chimneys, flues, and vents clear of debris and blockages. Hire a professional to clean your chimney every year, and if you haven\u2019t used the chimney for many years.\u00a0<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">6. Never smoke indoors<\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Never smoke cigarettes, cigars, or pipes indoors; smoking increases exposure to carbon monoxide and other harmful pollutants.<\/span><\/p>\n<h3><span style=\"font-weight: 400;\">7. Don\u2019t run a car engine in an enclosed space<\/span><\/h3>\n<p><a href=\"https:\/\/www.abe.iastate.edu\/extension-and-outreach\/carbon-monoxide-poisoning-garages-aen-207\/\" target=\"_blank\" rel=\"noopener external noreferrer\" data-wpel-link=\"external\"><b>Never let your vehicle idle<\/b><\/a><b> in an enclosed space<\/b><span style=\"font-weight: 400;\">, even if the garage door is open. Run your vehicle outdoors in an open, well-ventilated area to avoid dangerous gas buildup.<\/span><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-80971 aligncenter\" src=\"https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-96677770.jpg\" alt=\"what-causes-carbon-monoxide-in-a-house-1\" width=\"836\" height=\"556\" srcset=\"https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-96677770.jpg 1200w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-96677770-300x200.jpg 300w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-96677770-1024x681.jpg 1024w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-96677770-768x511.jpg 768w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-96677770-226x150.jpg 226w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-96677770-947x630.jpg 947w, https:\/\/www.redfin.com\/blog\/wp-content\/uploads\/2023\/02\/GettyImages-96677770-451x300.jpg 451w\" sizes=\"(max-width: 836px) 100vw, 836px\" \/><\/p>\n<h2><span style=\"font-weight: 400;\">How to know if carbon monoxide is in your house<\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A carbon monoxide detector will alert you if there are any dangerous gasses in your home. However, it\u2019s best to avoid using appliances that generate CO and to take all necessary precautions.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If your carbon monoxide detector goes off, get everyone outdoors and call your gas company\u2019s emergency line or 911. Stay outdoors until professionals tell you it\u2019s safe to reenter. <\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Carbon monoxide (CO) is a flammable, colorless, odorless gas that can harm you and your home. Read on to learn common causes and effects of carbon monoxide in a house and how to prevent it from entering your home. <\/p>\n","protected":false},"author":559,"featured_media":80973,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"default","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[10756,34278],"tags":[34610,34609],"coauthors":[34342],"class_list":["post-80970","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-featured-post","category-home-improvement","tag-home-improvement-faq","tag-home-maintenance"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>What Causes Carbon Monoxide in a House? | Redfin<\/title>\n<meta name=\"description\" content=\"Carbon monoxide is an odorless gas that can harm you and your home. 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