Smoke Alarm Installation and Placement
Ensure your home is protected with our First Alert smoke alarm installation guide. Learn the best placement for every room, understand NFPA recommendations, and avoid dead air zones to keep your family safe.
Carbon monoxide (CO) is an invisible, odorless gas that can be dangerous even at low levels over time. Because you can’t see or smell it, the only reliable way to know it’s present is to use a carbon monoxide alarm. This page explains what CO is, where it comes from, what a CO detector actually detects, and how to decide if your home should have CO alarms.
Carbon monoxide is produced when fuels don’t burn completely. It can build up indoors if exhaust can’t escape properly or if equipment is damaged, blocked, or used incorrectly. CO can spread through a home and reach sleeping areas, which is why alarms are so important.
A carbon monoxide alarm monitors the air for elevated CO levels. If the alarm senses a dangerous concentration based on its internal safety thresholds, it sounds an alert so you can take action quickly.
CO can be produced by common household sources that burn fuel. Problems usually occur when exhaust is blocked, equipment is malfunctioning, or a device is used in a way it wasn’t intended.
In most cases, no. A standard carbon monoxide alarm is designed to detect carbon monoxide gas, not natural gas (methane) or propane. Natural gas detectors use different sensor technology and are made specifically to detect fuel-gas leaks.
If you are concerned about both risks, look for the right alarm type for each hazard, or a combination solution only if it specifically lists the gases it detects.
Many homes benefit from CO alarms, especially if there is any chance CO could be produced or enter the home. Even all-electric homes may be exposed if they share walls with other units, have attached garages nearby, or have fireplaces or other combustion sources.
If you suspect CO exposure, treat it seriously. Symptoms can vary, and people may experience them differently.
Important: If your CO alarm sounds or anyone feels symptoms, move to fresh air and get help immediately.
It detects elevated carbon monoxide levels in the air over time. If the level becomes dangerous based on the alarm’s safety thresholds, it sounds an audible alert.
Usually no. Standard CO alarms are designed to detect carbon monoxide, not natural gas (methane) or propane. For fuel-gas leaks, use a detector that specifically lists natural gas or propane detection.
CO can come from fuel-burning appliances (furnace, water heater, fireplace), car exhaust from attached garages, or equipment like generators or grills used improperly. CO risks increase if exhaust is blocked or equipment malfunctions.
Many people still choose CO alarms, especially in multi-unit buildings or if there’s an attached garage nearby. CO can enter from adjacent spaces even if you don’t have fuel-burning appliances in your unit.
Move everyone to fresh air immediately and call emergency services from outside. Do not re-enter the home until professionals say it’s safe.
Ensure your home is protected with our First Alert smoke alarm installation guide. Learn the best placement for every room, understand NFPA recommendations, and avoid dead air zones to keep your family safe.
Learn where to install smoke alarms on every level and near bedrooms, plus where not to place them. Avoid “dead air” corners, vents, and ceiling fans for reliable detection.
Learn the differences between hardwired and battery smoke alarms and how to install each type. Includes wiring basics, placement tips, and when to choose each option.
Learn how to interconnect multiple smoke alarms so all units sound together. Covers hardwired interconnect, wireless options, compatibility tips, and troubleshooting.
Learn when to replace your First Alert smoke alarm, how to identify your connection type, choose the right replacement, install it safely, and dispose of old alarms responsibly.
Learn smoke alarm placement rules for apartments and rental homes, who is typically responsible for installation and upkeep, and hardwired vs battery options. Non-legal code basics included.
Learn where to install carbon monoxide alarms, how many you need, and placement tips for houses, apartments, and rentals - plus what to do when an alarm sounds.
Learn where to place carbon monoxide detectors for best protection - every level, near sleeping areas, and the right distance from appliances. CO alarms don’t need to be near the floor.
Compare hardwired, battery, and plug-in carbon monoxide alarms and follow simple installation steps for each type, plus placement tips, safety notes, and FAQs.
Learn what carbon monoxide is, where it comes from, what CO detectors detect (and don’t), whether they detect natural gas, and how to know if your home needs CO alarms.
Learn when to replace your First Alert carbon monoxide alarm, how to swap battery, plug-in, or hardwired models step-by-step, choose the right replacement, and dispose safely.
Learn CO detector placement for apartments and rental homes, who typically handles installation and battery changes, hardwired vs battery vs plug-in options, and basic code concepts (non-legal advice).
Learn how often to test smoke and CO alarms, how to test step-by-step, what to do if a test fails, how to reset First Alert alarms, and how monthly cleaning helps prevent false alarms.
Contact options may differ depending on the type of help you need.