House Grail is reader-supported. When you buy via links on our site, we may earn an affiliate commission at no cost to you. Learn more.

Will Candles Set Off a Smoke Alarm? Facts & FAQ

aroma candles

Candles can absolutely set off a smoke alarm. However, this typically won’t happen. Your average candle is not going to be smokey enough to set off a fire alarm. Plus, smoke alarms will be too high for a candle to set it off, assuming you’re placing the candle on a table or similar surface.

However, there are also plenty of occasions when a candle may set off a smoke alarm. For instance, if you place the candle right underneath the smoke alarm, you may easily cause the alarm to be triggered. Furthermore, some candles are extremely smokey. Usually, these are lower-quality candles. Also, some wick types are simply smokier than others.

It is completely possible for a candle to set off a smoke alarm. However, this shouldn’t necessarily be a normal occurrence.

user guide divider

Will a Woodwick Candle Set Off a Fire Alarm?

woodwick candle
Photo Credit: Magnus7777, Shutterstock

Woodwick candles are one of the newer candle types out there. These candle wicks are made of extremely flammable, slow-burning wood, which allows them to be used as candle wicks. However, because these wicks are wood, some are worried that the candles will cause excessive smoke.

Despite this, these candles do not produce more smoke than your average candles. They may have wicks made out of wood, but these wicks don’t produce significantly more smoke than your average candle.

There is no reason to avoid woodwick candles out of fear that they may set off your smoke alarm. As long as you do not hold the candle directly under the fire alarm, you should have no problem.

Can a Candle Set Off a Carbon Monoxide Detector?

carbon monoxide detector
Photo Credit: Rigby40, Pixabay

Some candles do produce carbon monoxide. Therefore, in theory, they could set off a carbon monoxide detector if they are used very close to the sensor. However, most sensors are not extremely sensitive. They’re made to detect levels of carbon monoxide that are harmful to humans. Candles will not produce this level of carbon monoxide, so the sensor should ignore it.

However, this isn’t always the case. There is a chance that the candle will set off the carbon monoxide detector. Of course, this is most likely to happen if you use the candle close to the sensor. If you’re worried about this potential problem, simply move the candle away from the sensor.

Will a Candle Set Off a Fire Sprinkler?

fire sprinkler
Photo credit; Dinoknot, Shutterstock

Most fire sprinklers are very similar to smoke detectors. As long as you aren’t placing the candle right under it, it should not cause the sprinkler to trigger. Some candles do produce more smoke than others, though. Furthermore, some fire sprinklers are more sensitive than others.

Therefore, there is always a chance that the candle will set off the sprinklers but the chances are rather low. Using the candle in a ventilated area away from the detector can prevent the possibility of it triggering.

Will a Candle Set Off a Smoke Alarm in a Hotel Room?

smoke detector
Image Credit; nikkytok, Shutterstock

Typically, smoke alarms in hotel rooms are set to be extremely sensitive. In some circumstances, this is to prevent people from smoking in the rooms. However, there is no way to know for sure if the smoke detector in your hotel room is extremely sensitive or not without lighting a candle.

Of course, whether or not the candle will set off the smoke alarm depends on a wide variety of factors. The position, sensitivity, and wick on the candle will all affect if the alarm gets triggered or not.

If you need to light candles for religious reasons, you may ask the hotel for accommodations. Some won’t care if you light the candle. Others may have rooms without smoke detectors that you may be able to light the candle in.

user guide divider


Smoke detectors are usually not sensitive enough to detect a candle. However, some candles are very smokey, and some detectors are extremely sensitive. Therefore, there is always a chance that the smoke detector will get triggered just by you lighting a candle.

If you don’t place the candle near the detector and light it in a well-ventilated area, the odds of the smoke alarm triggering are low.

Featured Image Credit: Pixel-Shot, Shutterstock


Related posts

OUR categories

Project ideas

Hand & power tools