
Levels of carbon monoxide exposure range from low to dangerous:
- Low level: 50 PPM and less
- Mid level: Between 51 PPM and 100 PPM
- High level: Greater than 101 PPM if no one is experiencing symptoms
- Dangerous level: Greater than 101 PPM if someone is experiencing symptoms
What level of carbon monoxide is considered dangerous?
Levels of carbon monoxide exposure range from low to dangerous: Low level: 50 PPM and less. Mid level: Between 51 PPM and 100 PPM. High level: Greater than 101 PPM if no one is experiencing symptoms.
How many ppm of CO2 is dangerous in a house?
How to avoid exposure: Have an HVAC or weatherization contractor measure CO2 levels within your home. If the levels exceed 1,000 ppm, the furnace should be tuned to increase levels of fresh air coming into the building. If levels are above 2,000 ppm, this can be a serious condition that could warrant HVAC modification.
What are the limits of carbon monoxide?
[OSHA PEL] The current Occupational Safety and Health Administration (OSHA) permissible exposure limit (PEL) for carbon monoxide is 50 parts per million (ppm) parts of air (55 milligrams per cubic meter (mg/m(3))) as an 8-hour time-weighted average (TWA) concentration [29 CFR Table Z-1].
What are the risks of carbon monoxide?
These may include:
- impaired mental state and personality changes (intoxication)
- the feeling that you or the environment around you is spinning (vertigo)
- loss of physical co-ordination caused by underlying damage to the brain and nervous system (ataxia)
- breathlessness and a heart rate of more than 100 beats per minute (tachycardia)

What level of carbon monoxide is acceptable?
50 parts per million[OSHA PEL] The current Occupational Safety and Health Administration (OSHA) permissible exposure limit (PEL) for carbon monoxide is 50 parts per million (ppm) parts of air (55 milligrams per cubic meter (mg/m(3))) as an 8-hour time-weighted average (TWA) concentration [29 CFR Table Z-1].
What is a good reading on a carbon monoxide detector?
Low level: 50 PPM and less. Mid level: Between 51 PPM and 100 PPM. High level: Greater than 101 PPM if no one is experiencing symptoms. Dangerous level: Greater than 101 PPM if someone is experiencing symptoms.
What level of CO is too high?
As CO levels increase and remain above 70 ppm, symptoms become more noticeable and can include headache, fatigue and nausea. At sustained CO concentrations above 150 to 200 ppm, disorientation, unconsciousness, and death are possible.
What are two warning signs of carbon monoxide poisoning?
Symptoms of carbon monoxide poisoning include:headache.dizziness.feeling sick or being sick.feeling weak.confusion.chest and muscle pain.shortness of breath.
Should a carbon monoxide detector read 0?
You and your family could have exposure to low levels of chronic carbon monoxide that your home CO detector isn't detecting. Even if you have a carbon monoxide detector that has a digital display reading of zero, the actual level of carbon monoxide is not zero.
How long does it take to get carbon monoxide poisoning?
If the carbon monoxide concentration in the air is much higher, signs of poisoning may occur within 1-2 hours. A very high carbon monoxide concentration can even kill an exposed individual within 5 minutes.
Can opening a window stop carbon monoxide poisoning?
Opening a window will slow carbon monoxide poisoning, but it likely won't stop it. There simply isn't enough airflow through most windows to get rid of the poisonous gas, and it could take between four and eight hours for the CO to dissipate entirely.
What does 400 mean on a carbon monoxide detector?
UL2034 Required Alarm Points*: If the Alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15 MINUTES. If the Alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50 MINUTES. If the Alarm is exposed to 70 ppm of CO, IT MUST ALARM BETWEEN 60 and 240 MINUTES.
What does 35 mean on a carbon monoxide detector?
If your CO levels creep above 35 PPM, evacuate your home and call 911. While this shouldn't be taken as a strict guideline, it helps you understand when carbon monoxide becomes dangerous. 35 PPM Maximum concentration allowed by federal law. 200 PPM Headaches, dizziness, or nausea after -3 hours.
What level of carbon monoxide sets off a detector?
The CO alarm sounds if your sensor detects a buildup of carbon monoxide in your home—usually before you start sensing symptoms. With a low CO level (50 ppm), it may take up to eight hours for the alarm to go off. Higher carbon monoxide levels (over 150 ppm) can trigger an alarm within minutes.
Should carbon monoxide detectors be low or high?
Because carbon monoxide is slightly lighter than air and also because it may be found with warm, rising air, detectors should be placed on a wall about 5 feet above the floor. The detector may be placed on the ceiling. Do not place the detector right next to or over a fireplace or flame-producing appliance.
What is carbon monoxide (CO) and how is it produced?
It is produced by the incomplete burning of various fuels, including coal, wood, charcoal, oil, kerosene, propane, and natural gas. Products and equipment powered by internal combustion engines such as portable generators, cars, lawn mowers, and power washers also produce CO.
What CO level is dangerous to my health?
Most people will not experience any symptoms from prolonged exposure to CO levels of approximately 1 to 70 ppm but some heart patients might experience an increase in chest pain. As CO levels increase and remain above 70 ppm, symptoms become more noticeable and can include headache, fatigue and nausea. At sustained CO concentrations above 150 to 200 ppm, disorientation, unconsciousness, and death are possible.
What are the symptoms of CO poisoning?
Because CO is odorless, colorless, and otherwise undetectable to the human senses, people may not know that they are being exposed. The initial symptoms of low to moderate CO poisoning are similar to the flu (but without the fever). They include:
How can I prevent CO poisoning?
Have the heating system professionally inspected and serviced annually to ensure proper operation. The inspector should also check chimneys and flues for blockages, corrosion, partial and complete disconnections, and loose connections.
How should a consumer test a CO alarm to make sure it is working?
Consumers should follow the manufacturer's instructions. Using a test button tests whether the circuitry is operating correctly, not the accuracy of the sensor. Alarms have a recommended replacement age, which can be obtained from the product literature or from the manufacturer.
How should I install a CO Alarm?
CO alarms should be installed according to the manufacturer's instructions. CPSC recommends that one CO alarm be installed in the hallway outside the bedrooms in each separate sleeping area of the home. CO alarms may be installed into a plug-in receptacle or high on the wall. Hard wired or plug-in CO alarms should have battery backup. Avoid locations that are near heating vents or that can be covered by furniture or draperies. CPSC does not recommend installing CO alarms in kitchens or above fuel-burning appliances.
What should you do when the CO alarm sounds?
Never ignore an alarming CO alarm! It is warning you of a potentially deadly hazard.
What are the two main sources of carbon monoxide?
Some common man-made releases of carbon monoxide are from fumes of vehicles, small engines (like those in lawnmowers and generators), stoves, fireplaces and furnaces. Carbon monoxide, or CO, is composed of one molecule of carbon and one molecule of oxygen, held together by a triple bond. Theresa Chiechi / Verywell.
Which organs are most vulnerable to carbon monoxide?
All areas of the body suffer from this toxicity, but the most vulnerable tissues to this suffocation are the organs that use the most oxygen, like the brain and heart. The developing nervous system is particularly sensitive to carbon monoxide. People with ongoing cardiovascular or respiratory disease may also be compromised ...
How does carbon monoxide affect cells?
How It Works. Carbon monoxide has a powerful ability to affect cell metabolism, as it can cause reactions that deprive cells of oxygen. This comes from the capacity of carbon monoxide to bind strongly to heme, an iron compound in hemoglobin, which carries oxygen to the tissues of the body.
Why is carbon monoxide inhaled?
The gas is used as a marker of respiratory status in spirometry, or lung function tests. Carbon monoxide is inhaled in small amounts because it mimics the behavior of oxygen in the body.
How does carbon monoxide kill rodents?
Carbon monoxide kills rodents by reducing the amount of oxygen transmitted to their cells.
What happens when carbon monoxide bonds with heme?
When carbon monoxide bonds with heme, it forms carboxyhemoglobin (COHb) and decreases the oxygen-carrying capacity of the blood. It also disrupts the release of oxygen already attached to the hemoglobin, so it can’t be released into tissues.
Is carbon monoxide a gas?
Carbon monoxide is an odorless, tasteless, poisonous gas that forms when carbons from fuels burn incompletely. It is lighter than air and released both naturally, such as from forest fires and volcanic eruptions, and through man-made processes.
How to tell if you have carbon monoxide in your home?
The following 12 signs may help you to detect a carbon monoxide leakage or buildup in your home. They are: 1 You see black, sooty marks on the front covers of gas fires. 2 There is heavy condensation built up at the windowpane where the appliance is installed. 3 Sooty or yellow/brown stains on or around boilers, stoves, or fires. 4 Smoke building up in rooms. 5 Yellow flames coming out from gas appliances except at natural gas fireplaces. 6 The pilot lights blow out frequently. 7 Solid fuel fires burn a lot slower than usual. 8 People in your home have these symptoms:#N#Breathlessness#N#Chest pains#N#Fits#N#Loss of consciousness#N#Headaches#N#Nausea#N#Confusion 9 Symptoms disappear once you are away from your home. 10 You get seasonal symptoms, such as headaches during the winter when the central heating is used more frequently. 11 Pets become ill. 12 Symptoms appear or seem to get worse when using fuel-burning equipment.
What are the sources of carbon monoxide in the house?
The potential sources of carbon monoxide in the house may be poorly functioning heating systems, water heaters, fuel-burning devices with no vents (for example, kerosene heaters, charcoal grills, camping stoves, gasoline-powered electrical generators), and motor vehicles. The open-air exposure to motorboat exhaust can also cause carbon monoxide ...
How far from a window can you use a gasoline engine?
Never use gasoline-powered engines inside your home, basement, or garage or less than 20 feet from any window, door, or vent.
Where to put CO detectors?
Fit a battery-operated or battery back-up CO detector alarms near your bedroom to detect any CO leak.
Can you use a gas range to heat a cabin?
Never use tape, gum, or something else to seal the vent pipe. This kind of temporary seal can make CO build up in your home, cabin, or camper. Never use a gas range, cloth dryer, or oven for heating the room because it may lead to the buildup of carbon monoxide. Never burn charcoal indoors. Burning charcoal gives off CO.
Where should a carbon monoxide alarm be located?
According to the carbon monoxide guidelines of the National Fire Protection Association (NFPA 720, 2005 edition), all carbon monoxide alarms “shall be centrally located outside of each separate sleeping area in the immediate vicinity of the bedrooms, ” and each alarm “shall be located on the wall, ceiling or other location as specified in the installation instructions that accompany the unit.”
Why should carbon monoxide alarms be lower on the wall?
There’s a myth that carbon monoxide alarms should be installed lower on the wall because carbon monoxide is heavier than air. In fact, carbon monoxide is slightly lighter than air and diffuses evenly throughout the room.
Why are CO alarms placed on the floor?
Standalone carbon monoxide alarms are often placed low on the wall because they need to be plugged into an outlet that’s near the floor . CO alarms can also have a screen that shows the CO level and needs to be at a height where it’s easy to read.
Should you install a CO alarm near heating or cooking appliances?
Why you shouldn’t install a CO alarm near heating or cooking appliances. Also keep in mind not to install carbon monoxide detectors directly above or beside fuel-burning appliances, as appliances may emit a small amount of carbon monoxide upon start-up. A carbon monoxide detector should not be placed within fifteen feet ...
How high should a carbon monoxide detector be placed?
Because carbon monoxide is slightly lighter than air and also because it may be found with warm, rising air, detectors should be placed on a wall about 5 feet above the floor. The detector may be placed on the ceiling. Do not place the detector right next to or over a fireplace or flame-producing appliance. Keep the detector out of the way of pets and children. Each floor needs a separate detector. If you are getting a single carbon monoxide detector, place it near the sleeping area and make certain the alarm is loud enough to wake you up.
How do I take care of my CO alarm?
Like smoke detectors, CO alarms need to be tested regularly and cleaned as indicated in the manufacturer's use and care booklet. If the unit operates off a battery, test the detector weekly and replace the battery at least once a year.
Do CO and smoke alarms have to be UL Listed?
Therefore, to help protect your family from both hazards, it's important to install both UL Listed CO alarms and smoke detectors.
Can you borrow a battery for a CO alarm?
If your unit operates off the battery, never allow anyone to "borrow" the battery. Like any appliance or power tool, a CO alarm can't work unless it has a functioning power source.
Do you need a carbon monoxide detector on each floor?
Each floor needs a separate detector. If you are getting a single carbon monoxide detector, place it near the sleeping area and make certain the alarm is loud enough to wake you up.
What are the symptoms of carbon monoxide?
When carbon monoxide levels reach unhealthy levels, many people start to experience flu-like symptoms such as weakness, headaches, vomiting, dizziness, and fatigue. The more exposure a person has, the more serious the symptoms become and can escalate to a pounding headache, confusion, and rapid heart rate.
Why is carbon monoxide dangerous?
It also sends more than 20,000 people to emergency rooms every year. One of the reasons carbon monoxide is so dangerous is because it's colorless and odorless, making it almost impossible to detect—unless you have a carbon monoxide detector. Carbon monoxide detectors are a must-have for your home. Knowing how to install them ...
How long does it take for a carbon monoxide alarm to respond?
For low levels of carbon dioxide, it might take the alarm an hour to sense and respond. If levels are high, the alarm detects them in as little as four minutes.
How far does a Vivint CO detector go?
Monitoring radius. The Vivint CO Detector monitors and detects carbon monoxide levels within a 35-foot radius, so you know you're protected throughout your home.
How far should a CO alarm be from the ceiling?
Because carbon monoxide is slightly lighter than air, some recommend that you place it on the ceiling or at least 5 feet from the floor.
How far away should you place a CO detector?
Place CO detectors 5-20 feet from common sources of carbon monoxide in the home, such as your water heater, furnace, or space heaters. Make sure you don’t place detectors too close to the sources, which could result in false alarms. Near your attached garage.
Do you have to have a CO detector in your home?
The first step in carbon monoxide safety is making sure you have working carbon monoxide detectors in your home. Unlike smoke detectors, CO detectors aren’t required by law, unless you live in one of these 26 states where all homes must have working CO alarms. Even if it’s not required by law, it’s perhaps the easiest and most effective way ...
