Homeownership

Do I Need Carbon Monoxide Detectors in My Home?

Patrick Kevin FaganPatrick Kevin Fagan Texas Real Estate Sales Agent #454749, AXEN Realty LLC · Senior Loan Officer, NMLS ID #877741, NEXA Mortgage, LLCUpdated October 9, 2026

PATRICK'S QUICK ANSWER

Yes, install carbon monoxide detectors on every level and near each sleeping area, because CO is odorless and deadly. I weigh three things with homeowners: the number of fuel-burning appliances, the age of the detectors, and battery maintenance. Test monthly and replace batteries twice a year. A detector costs little and catches the one gas you cannot smell. Never go without one in a home with gas heat or a fireplace. Ask Patrick about carbon monoxide detectors.

Yes, install carbon monoxide detectors on every level of your home and near each sleeping area. Place them within 15 feet of any fuel-burning appliance such as gas furnaces, water heaters, stoves, and fireplaces. Test the alarm monthly and replace batteries twice a year. Replace the entire detector unit every five to seven years.

Where to Place CO Detectors

Carbon monoxide detectors belong on every level of the home and near each sleeping area, with units within 15 feet of any fuel-burning appliance such as gas furnaces, water heaters, stoves, and fireplaces. Placement is the whole game, because CO is odorless and colorless, and the detector is the only way to know it is there.

The money angle is small: a detector costs little, and for that price it watches the one gas you cannot smell, taste, or see. That is the cheapest surveillance you will ever install.

Testing and Battery Care

Test the alarm monthly and replace batteries twice a year, a schedule you can anchor to the clock change. A detector with dead batteries is a wall decoration, so the test button is the maintenance you cannot skip.

The real-world habit is to pair the battery swap with the HVAC filter change in the same calendar reminder. Two small tasks, one reminder, and the whole house stays protected.

When to Replace the Unit

Detectors age out: replace the entire unit every five to seven years, because the sensor degrades even when the battery is fresh. Mark the install date on the device when you mount it, so the replacement date is never a guess.

The consequence of an aging sensor is the worst kind of silence: a detector that no longer alarms. Replacing units on schedule is the difference between peace of mind and a false sense of it.

Why They Matter

In a home with gas heat, a water heater, a stove, or a fireplace, carbon monoxide is a real, everyday risk. The gas is a byproduct of burning fuel, and a blocked vent, a backdraft, or a leak can push it into the living space without a single visible sign.

That is why the answer is not optional: every level, near every sleeping area, tested monthly, replaced on schedule. Make it a great one, Patriot Nation, and treat the CO detector like the smoke detector, one of the small devices that quietly protects everything you own.

Ask Patrick about CO detectors

Get a straight answer on CO detectors, placement, and gas safety.

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Patrick Kevin Fagan

Patrick Kevin Fagan

Loan Officer and Realtor · AXEN Realty LLC

Sales Agent · 454749 · TX

Home Safety Questions?

Ask Patrick anything about keeping your San Antonio home safe.

Answered by Patrick Kevin Fagan

Texas Real Estate Sales Agent #454749, AXEN Realty LLC · Senior Loan Officer, NMLS ID #877741, NEXA Mortgage, LLC

Call or text: 210-317-6514