Bathroom exhaust fans help keep indoor air fresh by removing moisture and odors, and are helpful in preventing mold. However, dust and lint can build up over time inside the fan itself, increasing the risk of fire—especially if the fan is old, runs too long, or isn’t maintained. That’s why we encourage regular cleaning, upgrading to a modern fan, and automatic shut-off timers to keep you and your family safe. Also, if you have an exhaust fan in your laundry room, all of this applies to that fan as well!
How Exhaust Fan Fires Start
Over time, dust and lint collect on the fan blades and motor. Even if you’re cleaning your bathroom regularly, dust will naturally make its way into the fan and settle on the blades and motor. This dust layer is more than a nuisance to add to your cleaning list; it can be dangerous and pose a fire hazard. There are several ways that a fire can start due to this buildup of dust:
- Old/worn-out fans are more likely to have faulty wiring. When the fan is running with dust buildup, the faulty wiring can spark, igniting the dust and quickly building a fire inside the fan.
- Motor overheating from the fan running too long, or if the fan is older with a worn-out motor. Worn-out bearings in older units make the motor work harder, producing more heat. This excess heat can ignite the debris and start a fire.
- Improper installation can lead to faulty wiring, which again can cause overheating and fire.
See this Instagram post from Daisy Mountain Fire & Medical showing the aftermath of a laundry room exhaust fan fire:
Why Bathroom Fan Fires Are So Dangerous
If a fire starts in your fan, imagine this: While the fan is running and pulling air up and away from occupied rooms, this spreads the fire up and out of sight. The excess oxygen also fuels the fire. These fires often spread in hidden areas like ceilings or attics, causing massive damage before anyone notices in time to put it out quickly. Besides the obvious safety risks involved in a house fire, a fire in the ceiling or attic can easily harm additional electrical wiring and ventilation systems, leading to costly repairs.
How to Prevent Exhaust Fan Fires
- Clean Regularly: Remove dust and lint at least every six months to prevent buildup.
- Use an Automatic Timer: A timer ensures that the fun only runs when needed, such as during and after showers. No more leaving the house with it accidentally and unnecessarily running all day!
- Listen for Odd Noises: Strange sounds may signal mechanical issues or debris.
- Get It Inspected: If you are concerned about anything – such as improper installation, unusual noises or smells, if it’s not working well to reduce humidity, or it’s old – it’s a great idea to have a professional electrician check the fan and wiring.
- Install a High Quality Fan: Don’t skimp when it comes to fire safety. Get a modern, efficient fan that is easy to clean and performs well. Plus, you get the double bonus of having a new fan that actually does its job and reduces the humidity in the room!
This Instagram post from Gilbert Fire & Rescue in Arizona has an excellent breakdown of the causes and solutions regarding bathroom and laundry room exhaust fans and fire prevention.
How Prairie Electric Can Help
Our residential electricians in Washington and Oregon are here to help you make sure that your bathroom and laundry room exhaust fans are installed properly and safely. If you read this and are finally cleaning that dirty fan and notice any red flags, reach out to us. We’ll come out and take a look and see if a new fan needs to be installed. We’ll also install an automatic timer to make sure that it doesn’t stay on for too long.
- Annual Cleaning and Oiling: We clean and lubricate fans to keep them running smoothly and prevent overheating.
- Replacement and Upgrades: We install modern, energy-efficient exhaust fans that meet current safety standards.
- Timer Installations: We install timers so your fan turns off automatically, reducing fire risks and extending the fan’s life.
More Home Electrical Services
In addition to exhaust fan installation, we offer electrical panel upgrades, lighting installations, and whole-house surge protection. Our team ensures quality work and home safety.
Schedule Your Service Today
Don’t let a small issue turn into a big problem. Contact Prairie Electric today to schedule a service appointment or learn how we can help keep your home safe. Your safety is our priority!
