
Does smoke detectors need to be hardwired?
Smoke alarms are required in all residential dwellings (single family homes, multifamily homes, hotels, rental properties, dormitories, etc.). Smoke alarms in newly constructed or renovated dwellings are required to be hardwired with a battery back-up, interconnected, and UL-listed.
Why are some smoke detectors hard-wired?
Both have their advantages. “Having a hardwired smoke alarm helps to increase the chance alarms have power and are ready to signal in case of a fire,” says Sharon Cooksey, the fire safety educator for Kidde. “In fact, three out of five home fires come from homes without working smoke alarms that are missing batteries.”
Can you use a hardwired smoke detector with just a battery?
Some smoke detectors rely exclusively on batteries for power, but hardwired smoke detectors have a battery that provides power only in the event of an electricity outage, such as could happen during a lightning strike or other event that interrupts the electrical circuit.
Are most smoke detectors hardwired?
We can tell you that we replace our smoke detectors every five to seven years. They are hard-wired into our electrical system, but that doesn't mean you need an electrician to replace them.
How can you tell the difference between a hardwired smoke detector and a battery?
3:204:35Smoke Detectors – Hard Wired Vs Battery Operated Only - YouTubeYouTubeStart of suggested clipEnd of suggested clipIf that battery does go flat then you smoke detector will cease and outright just stop to workMoreIf that battery does go flat then you smoke detector will cease and outright just stop to work whereas a hardwired smoke detector will give you continually.
Why do hardwired smoke detectors go off when power goes out?
Linked smoke detectors function on the 120-volt AC electrical system that is hardwired into a building or residence. Most have backup batteries to power the smoke alarms in the event of a power outage. Hardwired smoke alarms are vulnerable to power surges, which may cause them to fail temporarily or even permanently.
What happens if you take the battery out of a hardwired smoke detector?
A smoke alarm will eventually stop chirping if you do nothing. Once the battery has run out completely, the device will switch to residual power. Eventually, this will also drain and the device won't have enough power to beep and let you know it's out of power. You should change the battery before this happens.
Hardwired smoke detectors are an important safety upgrade to your home
Sponsored by Home Depot: This piece was created in partnership with Home Depot, home to Kidde fire safety products that can help you protect your home and family with fire alarms, carbon monoxide alarms and fire extinguishers.
Hardwired smoke detector vs. battery-operated
One of the biggest decisions when choosing a smoke detector is whether to opt for a hardwired or battery-operated model. Both have their advantages.
Installing hardwired smoke detector vs. battery-operated
This one boils down to how comfortable you are with electrical wiring. Hardwiring a new fire alarm system isn’t a DIY job; you’ll need to call an electrician.
Costs
Whether you’re choosing a hardwired smoke detector or a battery-operated unit, Cooksey says you’ll find plenty of affordable options. “They’re both typically offered at similar price points,” she says. You should also look at how to prevent home fires in the first place.
How long do hardwired smoke alarms last?
If you’re aiming for the longest dependable smoke alarm coverage, hardwired alarms can easily offer 10 years of protection, in fact every alarm must be replaced every 10 years.
Safety
Any working smoke alarm is better than none, so you’re headed in the right direction with either type. Cooksey stresses hardwired smoke detector units are often better in the long haul because you’ll most likely have power in the case of a fire or natural disaster.
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As Home Editor, Bryce Gruber is an expert in gift ideas, shopping, and e-commerce at Family Handyman. You've likely seen her work across a variety of women's lifestyle and parenting outlets and on TV shows. She lives and works in New York's Hudson Valley with her five small children.
Benefits of a Hardwired Smoke Alarm
If you live in a house with hardwired smoke detectors it decreases your risk of dying in a fire by 50%. Unfortunately, we often hear that people die in a fire because there were no working batteries in the fire alarm.
Types of Smoke Detector
The smoke detector consists of two ionization chambers, with one open to the air. An electrical charge on the ions allows a current between the chambers. This is what detects the smoke when there is a fire in your house.
Differences in Detectors
The Canadian Fire Alarm Association says that an ionization alarm is best at detecting fires with smaller particles and flames. The sort of fire that may start in your home if the kids are playing with a lighter or matches. While the photoelectric smoke detector responds to smoldering fires where a high airflow may be present.
Where to Purchase a Hardwired Smoke Alarm
If you want to purchase a simple ionization smoke detector you can do so in a hardware store where many different brands are available.
Frequently Asked Questions About Hardwired Smoke Alarms
Yes, to comply with recent building standards smoke alarms must be hardwired.
Why does my smoke detector go off in my bathroom?
If your smoke detector happens to be in close proximity to one of your bathrooms, a hot shower may be the cause. Just opening the bathroom door after a shower can cause the hall smoke detector to go off. Consider moving that detector or just do not open the door until the steam goes away.
How to fix a smoke detector that is not labeled?
A loose wire can also cause this problem. To fix this, go to the breaker box and turn off the breaker to the smoke detectors. If you do not see one labeled for the detectors, turn it off at the main breaker. Wait a few minutes and switch it back to the on position. This should fix the problem.
What type of detector detects fires?
As mentioned previously, there are two types of smoke detectors, photoelectric and ionization. They are both useful for detecting fires, but they work differently. Ionization detectors sense fires with a lot of flames first. Sometimes they do not detect a smoldering fire until there is a lot of smoke in your home.
Why does my smoke alarm beep?
If the interconnect wire is grounded, the detector will beep periodically until you fix it. Fast Fact: Sometimes, burning incense will set off your smoke alarm too. 7. Power Surge. Any kind of power surge or interruption in your electricity can cause a hard-wired smoke detector to go off.
How to clean smoke detectors?
Step One: Turn off the power to the smoke detector at the breaker box. Step Two: Remove the cover from the detect or. Some of them are just snapped on while others require you to remove a screw or two. Step Three: Use a small duster or hand vacuum to gently clean the dust out of the inside of the detector.
What is the orange wire used for in a smoke detector?
Improper installation. Some smoke detectors have an interconnect wire (orange wire) used for connecting smoke detectors together. This is to make all the smoke detectors go off if one goes off. It is a safety feature used in large homes and businesses.
What are the different types of smoke detectors?
But actually, there are two types of smoke detectors, which include photoelectric and ionization. Because they both specialize in different types of smoke detection, there is no way to know which type of detector is best for you.
How to change battery in hard wired smoke detector?
To replace the battery in your hard-wired smoke detector, follow these steps: If there’s a screw holding it in place, use the screwdriver to remove it. Press the “test” button and listen for a beep. If you hear a tone, then your detector is working.
Why does my smoke detector chirp?
Sometimes dust finds its way into your smoke detector and gathers in the sensing chamber, which can cause your detector to chirp. Dust can also cause false alarms, so if you’ve heard your alarm go off at random times, that could also indicate you have dust built up in your detector.
How to reset a smoke detector?
First, follow these quick troubleshooting steps: 1 Locate the reset button on the surface of the smoke detector 2 Hold it for 15–20 seconds and then release 3 Wait a couple of minutes and listen for the chirping noise again
How long do smoke detectors last?
Smoke detectors usually last 10 years, so if yours is older than that, you’ll need to replace it. Check the manufacture date printed on the smoke detector to see how old it is. If your smoke detector is relatively new, you may need to have a professional electrician inspect it to see why it’s malfunctioning.
What is the battery for a smoke detector?
Most hard-wired smoke detectors include a 9-volt backup battery that’s supposed to kick in if your home loses electricity. If that battery is running low, your detector alerts you with a high-pitched beep.
How to clean a chirping detector?
Remove the face of the detector. Use a vacuum hose or a small brush to clean out all of the dust. You can also use a mild detergent to eliminate any dust buildup. Replace the face of the detector and listen for the chirping sound.
What is a hard wired smoke detector?
Most hard-wired smoke detectors have a connection from the electrical wires to the smoke detectors that engages and disengages. It's like a plug. This connection makes it simple to replace bad or old smoke detectors with new ones. Advertisement.
What to do if your smoke detector is tied to your alarm?
If your smoke detector is tied into your alarm system, you might see if your alarm company has someone who can inspect and replace the smoke detectors that are failing. You might also be able to obtain replacement smoke detectors from the manufacturer if yours have failed.
How often should I replace my smoke detector?
We can tell you that we replace our smoke detectors every five to seven years. They are hard-wired into our electrical system, but that doesn’t mean you need an electrician to replace them. Modern hard-wired smoke detectors don't have wires in the back that need to be connected to loose wires in the ceiling. Most hard-wired smoke detectors have ...
How long do smoke detector batteries last?
Higher-priced smoke detectors may include a long-life battery that may last as long as a decade. We’ve also seen reviews of some of these detectors that say that you might be lucky to get three or four years out of them, but at least you’re not climbing up and changing batteries every year. Advertisement.
Do smoke detector batteries expire?
On a separate note, be sure that the batteries you put into the smoke detectors are new and not past their expiration date. A couple of years ago, Sam put what he thought was a new battery in a smoke detector but quickly learned that it was old when the smoke detector started chirping late at night.
Can I use a smoke detector with the same connector?
The key is knowing what connector your smoke detector has so that you buy a new smoke detector with the same connector. In fact, some smoke detector companies will give you an adapter you can use to connect both commonly used connectors to a new smoke detector. You can look up the brand of the smoke detector and then find a compatible one online ...
Why does my smoke detector have a false alarm?
A rapid increase in temperature, such as running a heater underneath it, might trigger the alarm on a hard-wired smoke detector. Dirt and debris clogging the device can also cause a false alarm. First Alert recommends dusting the alarm and the surrounding area or using a vacuum cleaner attachment around the alarm.
How does a smoke detector work?
A smoke detector protects your family by informing you of potential fire. The device registers temperature changes and smoke, both of which may indicate a fire. A hard-wired design operates on the power provided by the electrical system in your home, but it has a backup battery for emergency power failures. Hard-wired smoke detectors are far ...
How long does a hard wired smoke detector last?
A hard-wired smoke detector is not a permanent addition to your home. The device loses its effectiveness within 10 years. You should stay abreast of the U.S. Consumer Product Supply Commission regarding any problems that arise with your specific model.
Can you spray insect repellent on a smoke detector?
According to First Alert, you can spray insect repellent around the outside of the smoke detector to prevent bugs from accumulating in the device and clogging it, although the repellent should not be sprayed directly on the smoke detector. Advertisement.

Hardwired Smoke Detector vs. Battery-Operated
Installing Hardwired Smoke Detector vs. Battery-Operated
- This one boils down to how comfortable you are with electrical wiring. Hardwiring a new fire alarm system isn’t a DIY job; you’ll need to call an electrician. Replacing an existing hardwired alarm can be relatively easy for mildly handy types. For those who prefer the easiest possible installation with the least amount of know-how, a battery-operated smoke alarm may be best. Be sure to ins…
Costs
- Whether you’re choosing a hardwired smoke detector or a battery-operated unit, Cooksey says you’ll find plenty of affordable options. “They’re both typically offered at similar price points,” she says. You should also look at how to prevent home firesin the first place. Winner: A tie. This one boils down to preference and willingness to install.
How Long Do Hardwired Smoke Alarms Last?
- If you’re aiming for the longest dependable smoke alarm coverage, hardwired alarms can easily offer 10 years of protection, in fact every alarm must be replaced every 10 years. “Most fire codes require hardwired alarms,” Cooksey says. “There is a move to a hardwired smoke alarm with a built-in 10-year battery that lasts the life of the alarm and doesn’t require battery changes. Most f…
Dependability
- “Hardwired alarms are connected to a power supply ensuring the constant power needed for a working smoke alarm,” says Cooksey. “Working smoke alarms double the chance of escape from a home fire, so having the constant power supply helps. We caution that every alarm — hardwired, battery-only, or both — needs to be replaced at least every 10 years.” ...
Safety
- Any working smoke alarm is better than none, so you’re headed in the right direction with either type. Cooksey stresses hardwired smoke detector units are often better in the long haul because you’ll most likely have power in the case of a fire or natural disaster. Hardwiring is also great for forgetful types who may not remember to routinely check and replace batteries. Cooksey’s favor…