🚨 If your carbon monoxide alarm is going off right now
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Get everyone out, including pets
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Get to fresh air outside
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Don't go back in until responders say it's safe
What carbon monoxide is, and why the alarm matters
Carbon monoxide, or CO, is a gas produced when fuel burns. That includes gas furnaces, gas water heaters, gas stoves, fireplaces, and car engines. When those appliances work properly and vent outside, CO isn't a problem. When a vent gets blocked, an appliance malfunctions, or a car runs in an attached garage, CO can build up inside your home.
The danger is that you can't sense it. CO has no smell, no color, and no taste. It can build up while you sleep, and by the time you feel sick, you may already be too confused or weak to get out. The CDC reports that more than 400 people in the U.S. die from unintentional carbon monoxide poisoning every year, and thousands more end up in the hospital. A working CO alarm is the only reliable way to know it's there.
Know the early warning signs. CO poisoning often feels like the flu, but without a fever:
A clue worth noticing
If several people in your home feel sick at the same time, feel better when they leave, and get sick again when they come back, that pattern can point to carbon monoxide. Get outside and call 911.
The new NSPIRE rule: three ways a CO alarm fails
HUD's old inspection standard didn't include carbon monoxide alarms. NSPIRE does, and it treats CO alarm problems at the highest level of seriousness, called Life-Threatening. There are three separate ways a home can fail:
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The alarm is missing or in the wrong place
There's no CO alarm where one is required, or it's installed somewhere it can't do its job, like inside a closet.
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The alarm is blocked
Something is covering it or in the way, like furniture, a wall hanging, stored items, or tape.
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The alarm doesn't sound when tested
The inspector presses the test button and nothing happens. Dead batteries, a worn-out sensor, or a disconnected unit all count.
Any one of these fails the inspection. Once an inspection documents it, your landlord has 24 hours to correct it.
Does your home need one?
CO alarms are generally required when a home has a source of carbon monoxide. If any of these describe your home, you should have one:
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Gas or fuel-burning appliances
A gas furnace, gas water heater, gas stove or dryer, oil heat, or a fireplace.
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An attached garage
A garage connected to your home, even by a single door.
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Placement near bedrooms
Alarms usually go outside sleeping areas so they'll wake you. Your state or local code sets the exact rules.
If your home is all-electric with no attached garage, a CO alarm may not be required. Even then, it's a smart safety step, especially if you ever use a generator or fuel-burning heater nearby. When in doubt, ask your landlord or your Housing Authority.
How to check your alarm in two minutes
Do this once a month
1
Find it. CO alarms are often labeled "CO" or "Carbon Monoxide." Some are combined with a smoke alarm. Check the label.
2
Press and hold the test button. You should hear a loud alarm. If you hear nothing, it fails.
3
Make sure nothing is blocking it. Move furniture or items away so air can reach it and you can hear it.
4
Listen for chirping. A regular chirp usually means a low battery or that the alarm has reached the end of its life. Many alarms show which one on the label or display.
5
Snap a photo of the result. If it fails, a dated photo helps when you report it.
What to do if your alarm is missing or broken
1
Report it to your landlord in writing, today
Say that there's no CO alarm, or that it doesn't sound when tested, and that this is a Life-Threatening condition under HUD's NSPIRE standards. Attach a photo.
2
If it's a battery issue, check your lease
Some leases make tenants responsible for replacing batteries, while landlords handle missing or broken alarms. If it's just a low battery, swapping it yourself is the fastest fix. If the alarm is missing, expired, or still won't sound with a fresh battery, that's the landlord's job.
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Call your Housing Authority if it isn't fixed quickly
If your landlord doesn't act, contact your PHA and ask for an inspection. Once an inspector confirms the problem, the 24-hour deadline applies.
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Consider a plug-in alarm in the meantime
A basic plug-in or battery CO alarm costs about $20–$40 at hardware stores. It won't replace your landlord's responsibility, but it protects your family while you wait.
📋 Copy, fill in, and send
Hi [Landlord name],
I'm reporting a safety problem at [address, unit #]. [Choose one: "There is no carbon monoxide alarm in the unit." / "The carbon monoxide alarm does not sound when I press the test button."] I tested it on [date] and attached a photo.
Under HUD's NSPIRE standards, this is a Life-Threatening condition. Please let me know today when it will be installed or replaced.
Thank you,
[Your name] · [Phone]
Stay safe, and protect your housing
The alarm is your warning system, and a few habits keep CO from building up in the first place. Some of these also protect your voucher, because under program rules, families are responsible for problems they cause.
- Never remove the batteries or take down a CO alarm, even if it chirps. Report it instead.
- Never cover or tape over an alarm.
- Never use a gas oven or stovetop to heat your home.
- Never run a generator, charcoal grill, or camp stove indoors or in a garage.
- Never leave a car running in an attached garage, even with the door open.
- Never bring in a gas, propane, or kerosene space heater. If your home is cold, report it to your landlord.
The bottom line
If your home has gas appliances or an attached garage, you have a right to a working carbon monoxide alarm, and under NSPIRE, a missing or broken one is a 24-hour fix. Test it monthly, keep it clear, never disable it, and report problems in writing right away.
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Need help?
If a CO alarm sounds or someone has symptoms, get outside and call 911. For problems with your unit, contact your Public Housing Authority. For help finding local assistance, call 211, the free 24/7 helpline.
Source: Carbon monoxide alarm deficiency conditions and the 24-hour Life-Threatening correction timeframe are drawn from the HUD NSPIRE HCV/PBV Inspection Checklist (OMB No. 2577-0289), available at
hud.gov, and HUD's NSPIRE standards at
hud.gov/reac/nspire. Carbon monoxide health and fatality information is from the U.S. Centers for Disease Control and Prevention. Exact alarm requirements and placement are set by state and local codes, and battery responsibilities depend on your lease. This article is general information, not medical or legal advice.
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