Healthy Home Solutions Lesson 10: Combustion Gases

Healthy Home Solutions Lesson 10: Combustion Gases
< presenter name here> Introduce yourself. Explain that this presentation will include interactive activities and that you are open to receive questions during the presentation. Emphasize that this topic concerns life-threatening concerns in every home and that immediate application of recommendations from this lesson could save lives. Ask participants if they know what carbon monoxide is. Ask them to name other gases typically found in their home. Ask them to explain what these gases smell like. Notes to educator: This presentation can function as a teaching guide for the carbon monoxide chapter of the book: Help Yourself to a Healthy Home. Accompanying this presentation is the carbon monoxide: The Silent Killer and other combustion gases Lesson Guide. Important tips to emphasize in each slide are in bold print. Try to provide every participant with a copy of the book.

Knowledge: Describe health symptoms related to carbon monoxide poisoning
Comprehension: Identify locations in your home for carbon monoxide (CO) and other combustion gases. Application: List proper locations and maintenance of carbon monoxide alarms. Identify when a professional should inspect the home for problems. Identify additional resources for families. Learning objectives There are easy and important things we can do to limit our exposure to the dangers of carbon monoxide (CO) and other combustion gases Today’s learning objectives are as follows: Knowledge: Describe health symptoms related to carbon monoxide poisoning Comprehension: Identify locations in your home for carbon monoxide (CO) and other combustion gases. Application: List proper locations and maintenance of carbon monoxide alarms. Identify when a professional should inspect the home for problems. Identify additional resources for families.

Resource: Help yourself to a healthy home
Indoor Air Quality Asthma & Allergies Mold & Moisture Carbon Monoxide Lead Drinking Water Hazardous Household Products Pesticides Home Safety Resource: Help yourself to a healthy home Help Yourself to a Healthy Home is a booklet written by Cooperative Extension educators with funding from the Housing and Urban Development’s Office of Healthy Homes and Lead Hazard Control. It contains information about a variety of possible home health hazards, easy steps you can take to control these hazards and resources for additional information. The home environment is especially important because Americans spend an average of 90% of their time in the indoor environment. These are the 9 chapters in the Help Yourself to a Healthy Home book. This presentation focuses on 4. Carbon monoxide and other gases. Indoor Air Quality Asthma & Allergies Mold & Moisture carbon monoxide Lead Drinking Water Hazardous Household Products Pesticides Home Safety Each chapter provides information, action steps and resources for more information. A link to this book may be found on

Seven tips for keeping a healthy home
Keep It: Dry Clean Pest-free Ventilated Safe Contaminant-free Maintained Seven tips for keeping a healthy home Because looking at the indoor air quality inside homes (and other healthy homes principles) can involve many contributing factors, these seven tips help us to look at the house as a system. The seven tips help us think about the home environment in a holistic way. Keep It: (1) Dry; (2) Clean; (3) Pest-free; (4) Ventilated; (5) Safe; (6) Contaminant-free and (7) Maintained For healthy homes, a three-step process is often applicable when attempting to discover if there is a problem. This process is also applicable when looking at carbon monoxide and other combustion gases issues: Identify the problem and/or test for potential problems Remove/mitigate the source of the problem(s) and the problem Increase ventilation of the home Web:

What are combustion gases?
What types of combustion gases are found in homes? Where are these gases found in homes? What do they smell like? How do we know if these gases are dangerous? What are combustion gases? Discussion: Ask participants what they know about combustion gases Keep a list on the flip chart of participant responses What types of combustion gases are found in homes? Where are these gases found in homes? What do they smell like? How do we know if these gases are dangerous?

Combustion gases are from the burning of fuels (natural gas, propane, wood, oil, kerosene, and coal) in the home These gases typically include: Carbon monoxide (CO) Nitrogen dioxide (NO2) Sulfur dioxide (SO2) Particulates (soot, smoke) Combustion gases Combustion gases Combustion gases are from the burning of fuels (natural gas, propane, wood, oil, kerosene, and coal) in the home These gases typically include: Carbon monoxide (CO) Nitrogen dioxide (NO2) Sulfur dioxide (SO2) Particulates (soot, smoke) Note: Carbon monoxide (CO) is different than carbon dioxide (CO2), which is what humans generate when breathing out (exhaling).

Combustion gases INVISIBLE Most of these gases are
They cannot be seen or smelled! Carbon monoxide (CO) is especially dangerous in that families are often exposed to very harmful and sometimes lethal levels without knowing about it. Combustion gases INVISIBLE Combustion gases Most of these gases are invisible. They cannot be seen or smelled! Carbon monoxide (CO) is especially dangerous in that families are often exposed to very harmful and sometimes lethal levels without knowing about it. Because carbon monoxide cannot be seen or smelled, it is often called the “silent killer”

The smell is from the un-combusted (un-burnt) gases from gas appliances, water heater, or furnace
The smell (sometimes like sulfur) is a chemical added by the gas company so that you are aware of a gas leak If you smell gas or believe there is a gas leak, leave the house and call immediately I smell gas! I smell gas! The smell is from the un-combusted (un-burnt) gases from gas appliances, water heater, or furnace The smell (sometimes like sulfur) is a chemical added by the gas company so that you are aware of a gas leak Safety tips for gas leaks (un-combusted gas) Un-combusted gas can be a serious explosion hazard Keep a flashlight handy to investigate minor gas odors. Never use matches or candles to look for gas leaks, and never turn any electric switches on or off if you suspect a gas leak. Check pilot lights to see if they are lit. If the smell of gas continues, or if you have any doubts, open windows and doors and get everyone out of the home. Use a phone away from the home and call Then call your gas company. In addition to the odor added to natural gas, the following may indicate the presence of a gas leak: Hissing, whistling or roaring sounds, damaged connections to gas appliances, dead or dying vegetation in otherwise moist areas over or near pipeline areas, unusual soil movement or bubbling water, exposed pipeline after an earthquake, fire, flood or other disaster.

Warning signs of carbon monoxide exposure
Headaches Dizziness Disorientation Blurry vision Weakness Nausea Fatigue Vomiting Chest pains Sleepiness Warning signs of carbon monoxide exposure Warning signs of carbon monoxide exposure: Headaches, dizziness, disorientation, blurry vision, weakness Nausea, fatigue, vomiting, chest pains, sleepiness Warning signs are important! Because it is impossible to see, taste or smell the toxic gas, carbon monoxide can make people very sick and even kill before people realize that it is in the home At lower levels of exposure, CO causes mild effects that are often mistaken for the flu These symptoms include headaches, dizziness, disorientation, nausea and fatigue The effects of CO exposure can vary greatly from person to person depending on age, overall health and the concentration and length of exposure

Carbon monoxide is DANGEROUS
Carbon monoxide exposure is measured in parts per million in the surrounding air CO levels: (ppm) 0 - 5: normal amount of carbon monoxide in a healthy home 30+: most carbon monoxide detector alarms will sound : flu-like symptoms : headache, fatigue, nausea 150 +: disorientation, unconsciousness, death Carbon monoxide is DANGEROUS Carbon monoxide is dangerous! CO reduces the blood's ability to carry oxygen Exposure to smaller quantities of CO often causes a person to lie down thinking they have the flu. After they lie down, the concentration of CO becomes fatal while the person is asleep Moderate levels of CO may cause a person to lose consciousness and then it often becomes fatal People who are sleeping or who have been drinking alcohol can die from CO poisoning before ever experiencing symptoms CO poisoning may occur sooner in children, elderly, or those with heart or lung diseases Every year, hundreds of people die in the U. S. from accidental CO poisoning; over 20,000 people visit emergency rooms and over 4,000 people are hospitalized Here is a breakdown of exposure levels and possible outcomes: Carbon monoxide exposure is measured in parts per million(ppm) in the surrounding air. 0 - 5: normal amount of carbon monoxide in a healthy home 30+: most carbon monoxide detector alarms will sound : flu-like symptoms : headache, fatigue, nausea 150 +: disorientation, unconsciousness, death

Nitrogen dioxide (NO2) and sulfur dioxide (SO2) exposure
Ear, nose, and throat irritation Increased respiratory infections Shortness of breath Bronchitis Nitrogen dioxide (NO2) and sulfur dioxide (SO2) exposure Although not as toxic or deadly as carbon monoxide (CO), Nitrogen Oxide (NO2) and Sulfur Dioxide (SO2) acts mainly as an irritant affecting the mucous of the eyes, nose, throat, and respiratory tract Continued exposure to high NO2 and SO2 levels can contribute to the development of acute or chronic bronchitis Low level exposure may cause increased bronchial reactivity in some asthmatics, decreased lung function in patients with chronic obstructive pulmonary disease and increased risk of respiratory infections, especially in young children

Questions for you and your family
Ask yourself (and family) these questions: Are you or your family’s health symptoms experienced by more than one family member? Are symptoms more severe in family members who spend a lot of time in the home? Are symptoms less severe when you or your family is away from home? Are symptoms experienced by visitors to your home? Always seek advice from your physician! Questions for you and your family Questions for you and your family Ask yourself (and family) these questions: Are you or your family’s health symptoms experienced by more than one family member? Are symptoms more severe in family members who spend a lot of time in the home? Are symptoms less severe when you or your family is away from home? Are symptoms experienced by visitors to your home? Always seek advice from your physician! If CO poisoning is suspected, it is very important that you and your family leave the house and seek immediate attention from a doctor or other medical professional. Although the signs of carbon monoxide poisoning can be subtle, the condition is a life-threatening medical emergency. Get immediate care for anyone who may have carbon monoxide poisoning.

Combustion gas sources
Carbon monoxide and other combustion gases are commonly found in these locations in a home: Gas appliances: Ovens Ranges and stoves (cooktops) Dryers Furnaces, boilers, and water heaters Fireplaces and wood burning stoves Garages (car exhaust) Space heaters Combustion gas sources Combustion gas sources This list summarizes the most common locations of CO and combustion gases in homes. Carbon monoxide and other combustion gases are commonly found in these locations in a home: Gas appliances: Ovens Ranges and stoves (cooktops) Dryers Furnaces, boilers, and water heaters Fireplaces and wood burning stoves Garages (car exhaust) Space heaters Note that all appliances will be a concern for carbon monoxide or other combustion gas, as many of these might be electric and not gas or other combustibles like oil or wood The next slide will summarize less common locations for these gases in a home =>

Other combustion gas sources
Carbon monoxide and other combustion gases are also found in these locations: Space heaters Grills and meat smokers Lawnmowers, snowblowers, and gas-powered generators Cigarette smoke Other combustion gas sources Other combustion gas sources Carbon monoxide and other combustion gases are also found in these locations: Space heaters Grills and meat smokers Lawnmowers, snowblowers, and gas-powered generators Cigarette smoke Note: Some of these items are typically found outside of homes or in garages but still pose a hazard for combustion gases, especially if located inside the home

This graphic is from the CPSC and should be shown to and reviewed with participants as a large poster and/or a handout. It shows graphically the common locations of CO and combustion gases in and outside of homes. It is available at . In general, CO and combustion gases are generated as a result of combustion of flammable gasses (LP, natural gas, gasoline) or wood (firewood, charcoal). Ask participants: If they have a fireplace, wood burning stove, or the following gas appliances: range (cooktop), water heater, furnace, or space heater. To describe their garage (carport or enclosed garage) and where it is related to the bedrooms.

Some sources of carbon monoxide and other combustion gases may include: Unvented appliances, furnaces, fireplaces, stoves, or space heaters Appliances, furnaces, fireplaces, stoves, or space heaters not working properly or needing repair Vehicles and gasoline powered items running in garages or inside the house Charcoal grills or meat smokers running in garages or inside the house Blocked chimneys and flues Combustion gas sources Combustion gas sources Carbon monoxide and other combustion gases are a severe health hazard (and possibly fatal) due to: Unvented appliances, furnaces, fireplaces, stoves, or space heaters Appliances, furnaces, fireplaces, stoves, or space heaters not working properly or needing repair Vehicles and gasoline powered items running in garages or inside the house Charcoal grills or meat smokers running in garages or inside the house Blocked chimneys and flues

Combustion gas and water heaters
A flue above an old natural gas water heater. Dangerous levels of carbon monoxide can be generated if the water heater is not working properly, the flue is disconnected, or the flue is blocked. As seen by this picture, it is common to see a gap between the top of the water heater (or furnace) and the flue, as this is normal.

Combustion gas, water heaters, and furnaces
Worn or poorly adjusted and maintained combustion devices (e.g., furnaces) can be significant sources. These pictures show flues above an old natural gas water heater and an old natural gas furnace. Dangerous levels of carbon monoxide can be generated if these are not working properly, the flues are disconnected, or the flues are blocked. When flues are mostly horizontal, as shown in these pictures, they are much more prone to separation, blockage, and/or leakage of combustion gases. Flues should be located and installed as vertical as possible. Connections (joints) in these flues should be properly sealed to prevent escape of carbon monoxide and other combustion gases.

Combustion gas and cooktops
These pictures show gas ovens and ranges (cooktops) in kitchens. The picture on the left has no ventilation system above the appliance, so it is more likely to create hazardous levels of carbon monoxide. The picture on the right shows a gas oven and range (cooktop) with a range hood, which properly ventilates the carbon monoxide (and cooking smells) in and around the appliance. Range hoods above gas ranges should ventilate directly to a outside wall or above the roof. They should never ventilate to another area of the house, garage, attic, or crawlspace. The range hood should also ventilate to the outside and not be one of the recirculating type (which blows the air back into the kitchen). Important! Ovens, stoves, and other appliances should never be used for heating a home as this can create dangerous levels of CO and other combustion gases.

Carbon monoxide and charcoal
Two men trying to keep warm are found dead By Bill Bryan ST. LOUIS POST-DISPATCH 12/04/2006 Two men died early Sunday, apparently of carbon monoxide poisoning, after they lighted a pile of charcoal briquettes in a metal mixing bowl to keep warm and then fell asleep, St. Louis police said. Carbon monoxide and charcoal Especially dangerous are charcoal grills inside the home, unvented gas appliances in the home or garage, running cars inside of closed garages Many fatalities from carbon monoxide poisoning are due to these unfortunate poor decisions Remember, exposure to smaller quantities of CO often causes a person to lie down thinking they have the flu After they lie down, the concentration of CO becomes fatal while the person is asleep Sometimes moderate levels of CO cause a person to lose consciousness and then it often becomes fatal

Checking for combustion gas problems
In most cases, carbon monoxide and other combustion gases can be detected and checked by the following: Proper installation, location, and maintenance of carbon monoxide detectors (Alarms) in your Home Yearly inspection of all gas appliances, furnaces, water heaters, stoves, ovens, and fireplaces by a qualified or licensed contractor Checking for combustion gas problems Checking for combustion gas problems In most cases, carbon monoxide and other combustion gases can be detected and checked by the following: Proper installation, location, and maintenance of carbon monoxide detectors (Alarms) in your Home Yearly inspection of all gas appliances, furnaces, water heaters, stoves, ovens, and fireplaces by a qualified or licensed contractor

Carbon monoxide detectors (alarms)
Install and maintain carbon monoxide (CO) alarms inside your home to provide early warning of dangerous levels of carbon monoxide. CO alarms should be installed in a central location outside each separate sleeping area and on every level of the home. Choose a CO alarm that has the label of a recognized testing laboratory. CO alarms are not substitutes for smoke alarms. Know the difference between the sound of smoke alarms and the sound of CO alarms Carbon monoxide detectors (alarms) Carbon monoxide detectors (alarms) Are available at most hardware and large retail stores, usually in the safety section (most often they are near the smoke detectors). They typically cost between 20 – 40 dollars each. Some are available combined with a smoke detector and are more expensive. Install and maintain carbon monoxide (CO) alarms inside your home to provide early warning of dangerous levels of carbon monoxide. CO alarms should be installed in a central location outside each separate sleeping area and on every level of the home. Carbon monoxide alarms can be placed at the ceiling or near the floor. If it is a combined alarm (smoke and CO), it should be installed for proper placement of the smoke alarm, which is identified in the manufacturer’s installation instructions. Choose a CO alarm that has the label of a recognized testing laboratory. CO alarms are not substitutes for smoke alarms. Know the difference between the sound of smoke alarms and the sound of CO alarms Carbon monoxide detectors (alarms) should not be installed near furnaces, water heaters, stoves, garages, or other gas burning appliances. Even though these are locations are where the CO is often found, they will cause the alarm to go off frequently, even with less than dangerous levels of CO. A carbon monoxide alarm will frequently sound when the carbon monoxide levels are slightly less than dangerous, to give you and your family time to leave the home before the CO levels become dangerous. Keep in mind that CO levels can become dangerous in minutes!

Installation methods of carbon monoxide detectors (alarms): Wired to the home electrical system (often called hard-wired) with a battery backup (best installation) Plugged into a home electrical outlet with a battery backup Battery only (no other electrical input) Carbon monoxide detectors (alarms) If possible, the detectors (alarms) should be installed into the home electrical system (hard-wired or plugged into an outlet) with a battery backup. This will allow the alarm to function when the power goes out or the battery is dead (assuming that both cases are not together).

Types of carbon monoxide detectors (alarms): Alarm only Alarm and digital readout or CO in parts per million (ppm) Sniffer (used by fire personnel or inspectors) Carbon monoxide detectors (alarms) The next slide shows pictures of these types of detectors.

This slide shows various types of carbon monoxide detectors (Alarms). The two pictures on the left show detectors (alarms) that make a very loud noise when carbon monoxide is at a dangerous level. The middle picture shows a detector (alarm) that makes a very loud noise when carbon monoxide is at a dangerous level, but also shows the level of carbon monoxide in the air in parts per million (ppm). The detector on the right is used by fire personnel and qualified inspectors to find carbon monoxide leaks in a home. These detectors are often called “sniffers” and are available in different types to detect CO, NO2, SO2, and un-combusted gas leaks. The sniffers should only be used by qualified inspectors and require special training and education to use in a home.

Carbon monoxide detectors (alarms) should be tested monthly by pressing the “test” button Not sure how to test the alarm? Refer to the manufacturer’s instructions Regularly vacuum or dust the surface of the alarm to make sure there is no dust blocking the holes in the alarm Replace the batteries each year; consider “fall back” (the end of daylight savings in autumn) Carbon monoxide detectors (alarms)

Carbon monoxide detectors (Alarms) should be replaced every 5 – 7 years All detectors (alarms) have either a manufacturing date or expiration date Carbon monoxide detectors (alarms) Carbon monoxide detectors that are past the expiration date (5 -7 years past the manufacturing date) have detectors that are too old to function properly and may not accurately detect dangerous levels of CO in the home. The picture shows the back of a CO detector (alarm) showing the manufacturing date (July 07, 2010). This alarm can be used until approximately July 2015.

When the alarm makes noise
What to do when the CO alarm goes off (makes noise): LEAVE THE HOME IMMEDIATELY! Call from outside the home. Report that your CO alarm is sounding Wait outside the home for the fire department to arrive, find the source of the problem, and ventilate the home. Go to the emergency room or urgent care if you are experiencing symptoms of CO poisoning When the alarm makes noise You should not waste any time evacuating the home when a CO detector (alarm) is sounding. Remember that carbon monoxide can reach dangerous, even fatal, levels in minutes. When the fire department arrives, they will do the following: Attempt to find the cause of the alarm, including checking for CO leaks in furnaces, appliances, water heater, flues, fireplaces, and other locations. This procedure is similar to the yearly inspection. Open windows and/or turn on ventilation systems in order to reduce the levels of CO in the home to safe levels. Interview you to discuss what might be causing the alarm and safety measures for you to take prior to going back into the home. It may be hours before the fire department is able to determine the problem, and you will not be able to safely re-enter the home until the problem is resolved. If you feel you have been exposed to CO poisoning, it is important to see a physician (doctor) or nurse right away. The doctor or nurse can check your lungs and blood for signs of CO exposure and can recommend additional medical care. Similar to planning for a fire, you and your family should also prepare for this emergency by planning outside meeting location and reviewing what should be done in this emergency.

Items typically included in a yearly inspection by a qualified or licensed contractor:
Proper functioning, repair, and cleaning of all gas appliances, furnace, water heater, stoves, ovens, dryers and other sources of CO and gases; combustion air openings are not blocked No blockage in flues and all flue joints are sealed and not leaking gases. Flues are properly ventilating to the outside. Burners in appliances have mostly blue flames instead of yellow. Yearly inspection In most cases, carbon monoxide and other combustion gases can be detected and checked by a yearly inspection of all gas appliances, furnaces, water heaters, stoves, ovens, fireplaces, and other sources of CO and gases by a qualified or licensed contractor. A qualified or licensed contractor is typically a person who has specific expertise in inspecting homes for combustion gases and has the proper tools to do a thorough inspection. Often these contractors are employed in Heating, Ventilation, and Air Conditioning (HVAC) companies or are licensed Home Inspectors In some areas of the US, these contractors are required to be licensed Check for appropriate qualifications and licenses before hiring an inspector This inspection is preferred in the autumn (fall) right before the heating season when the furnace or other heating system will be used for the first time after summer.

CO and gas leakage in all gas appliances, furnace, water heater, stoves, ovens, dryers and other sources of CO and gases, are below required and at safe levels; No backdrafting Chimneys and flues for fireplaces or wood stoves are intact and not falling apart Chimney flues are properly ventilated to the outside Smoke is not coming back into the room when the fireplace or stove is burning Fireplace/stove doors are tightly fitted Yearly inspection Some homes may have a problem with "back drafting.” That's when the air pressure inside the home is less than the air pressure outside, causing combustion by-products from furnaces, water heaters, fireplaces and similar equipment to spill back into the room rather than being vented outside.(Sometimes flue gases can be drawn back into the home when several sources are being exhausted at once.) Back drafting can also occur when natural draft appliance exhaust is pulled back into the house by mechanical ventilation-like a down-draft kitchen power vent.

Range hoods above gas stoves are installed and properly ventilated to the outside Observe if homeowner is using unvented temporary heaters, indoor charcoal grills, or using appliances for space heating Excessive moisture or condensation in home due to malfunctioning heating systems Yearly inspection

Carbon monoxide and gasoline fumes are not entering the house from air leaks between the garage and the rest of the home Temporary and permanent space heaters are ventilating to the outside Rust, soot, or dirt is not observed on the furnace, boiler, flues, or water heater Yearly inspection If any of these inspection items suggest hazardous levels of carbon monoxide or other combustion gases are observed or possible, immediately repair or replace to correct the deficiencies. Without immediate repair or replacement, your health and safety and the health and safety of your family is at risk. Appliances are typically in need of replacement every 5 – 10 years. Furnaces, boilers, water heaters, and other gas heating systems are replaced approximately every 10 – 15 years. Keep in mind that the major source of combustion Pollutants including CO are improperly vented or unvented fuel-burning appliances such as space heaters, woodstoves, gas stoves, water heaters, dryers, and fireplaces. The types and amounts of pollutants produced depends on the type of appliance, how well the appliance is installed, maintained, and vented, and the kind of fuel it uses.

Between yearly inspections by a licensed or qualified contractor:
Observe conditions Take precautions Be aware of problems in areas that contribute to CO and combustion gases in the home For example: Between inspections

What you can do between inspections
Look for flames in appliances, furnace, water heater, ovens, and ranges (cooktops) that are mostly yellow and not blue Look for cracks, gaps, holes, or missing pieces in flues, chimneys, and vents Check to make sure that flues, chimneys, and vents are connected and ventilate to the outside. Check that dampers are open when using fireplaces and wood stoves Look for excessive humidity or condensation in the air or on windows What you can do between inspections

What you can do between Inspections
Look for rust or water streaking on chimneys and flues Clean fireplace and wood stove chimneys and flues regularly (at least yearly) Check for loose panels on furnaces, water heaters, stoves, and appliances Verify monthly that carbon monoxide detectors (alarms) are working and free of dust Check that generators are safe distances away from windows and doors to the house What you can do between Inspections

What you can do between Inspections
Check that generators are safe distances away from windows and doors to the house Never use unvented gas appliances or charcoal grills in the home, attic, or crawlspace; do not use any gas camp stove or equipment inside the home Never run any car, vehicle, or gas powered engine in a closed garage or other enclosed space Never use ovens, cooktops, or grills for space heating What you can do between Inspections

What you can do between inspections
When using gas appliances, furnaces, water heaters, fireplaces, or stoves, follow manufacturer’s instructions for operation and routine maintenance Do not try to alter, install, or repair appliances, fireplaces, stoves, furnaces, water heaters, or other combustion items Do not place items against or block the air intake or exhaust of any gas appliance, water heater, or furnace What you can do between inspections

Additional resources on CO and combustion gases
Carbon Monoxide Hotline: US Environmental Protection Agency (EPA) – An Introduction to Indoor Air Quality (IAQ): Carbon monoxide (CO) US Consumer Product Safety Commission (CPSC) – Carbon monoxide Information center monoxide-Information-Center/ American Lung Association – carbon monoxide indoors US Environmental Protection Agency (EPA) – An Introduction to Indoor air quality (IAQ): Sources of combustion products US Department of Housing and Urban Development - About carbon monoxide yhomes/carbonmonoxide Additional resources on CO and combustion gases

Thank you! Questions? Comments?
Act today to eliminate dangerous levels of combustion gases in your home Questions? Comments?

Healthy Home Solutions Lesson 10: Combustion Gases

Similar presentations

Presentation on theme: "Healthy Home Solutions Lesson 10: Combustion Gases"— Presentation transcript:

Similar presentations

About project

Feedback

Log in

Auth with social network:

Healthy Home Solutions Lesson 10: Combustion Gases

Similar presentations

Presentation on theme: "Healthy Home Solutions Lesson 10: Combustion Gases"— Presentation transcript:

Similar presentations

About project

Feedback