Smoke and CO Detector Installation in Montclair, VA

Why CO alarms matter in Montclair homes

Montclair is split between gas and electric heat. The Census counts about 3,300 homes that heat with utility gas, about 60 with propane, and about 3,900 with electricity (Census ACS). A gas furnace, water heater, range or fireplace can make carbon monoxide if it is not burning right. So can a car left running in an attached garage.

The CPSC says to put a CO alarm on every level of the home and outside sleeping areas. In a gas-heated Montclair house, we look at where the furnace and water heater sit and where people sleep, then place alarms to match.

Gas service in Prince William County is not one company. Washington Gas says some areas of the county are served by Columbia Gas instead. Your gas bill tells you which one to call about a gas smell or a leak. All-electric homes still need CO alarms if they have an attached garage or a generator.

How old are the smoke alarms in a Montclair house?

Census data puts the median Montclair home at 1990, with about 2,400 homes from the 1980s and about 1,200 from the 1970s. The NFPA says to replace smoke alarms 10 years after the date printed on the back. If an alarm in your home has a date from the 1990s or 2000s, or no date you can read, it is due.

If your home has hardwired alarms, new ones must match the wiring and plug type, or the old plugs get changed. We replace the full set at once and check that one alarm sets off all of them.

After an outage, the county reminds people to keep generators and grills away from doors, windows and vents so CO does not get in (county power outage page). A working CO alarm is the backup to that advice.

Is a permit needed for smoke alarms in Prince William County?

For a straight swap on existing wiring, it is not confirmed. No county page names smoke alarms, and USBC 108 leaves minor work to the building official. Call Building Development at 703-792-6930 when it is not clear.

New alarm locations are new wiring. The county's permit guide says a new circuit or fixture needs a permit, so adding hardwired alarms where there were none goes under a permit. Finishing a basement also needs a permit, and new alarms often come with it.