Do Bathroom Fans Remove The Smell?

Do Bathroom Fans Remove The Smell?

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Do Bathroom Fans Remove The Smell?

From experience, having a bathroom that has neither a fan nor a window can prove to be quite unpleasant.

There is usually some odor after the bathroom has been used, be it from fecal matter or strong bathroom cleaning agents.

Which whisks away if there is good ventilation in the bathroom; if not, then the smell will stay in the room for quite long, which is disgusting.

Bad odor is not the main reason for installing a bathroom fan. Mold can grow in a bathroom due to indoor condensation.

Which could be a health risk due to direct contact with the body. So, bathroom fans are installed to remove moisture from the bathroom.

It can also be used to get rid of bad smells and keeps a hygienic environment. 

Yes, bathroom fans remove a small amount of smell. A bathroom fan is installed to remove steam and humidity in the bathroom and not smell.

To completely clear off bad odor in the bathroom, using a bathroom exhaust fan would be advisable.

Bathroom exhaust fans come in handy when it comes to removing foul odor from the bathroom.

Bathroom exhaust fans work by sucking in the air from your bathroom and out of your house.

Exhaust fans are primarily found in kitchens for odor removal, and these work in the bathroom as well.

Installing a regular fan will not do the work because it just circulates air and the odor around the room.

There are also water-resistant room fans made for bathrooms, but their primary purpose is to cool the room, so they will not get rid of foul odor.

For exhaust bathroom fans, they start getting rid of the foul smell immediately they are turned on, and, in a few minutes, the bathroom gets fresh.  

Does A Bathroom Fan Use A Lot Of Electricity?

No, a bathroom fan does not use a lot of electricity unless it’s a high-watt fan. A bathroom exhaust fan can use as low as 10-watts and go as high as 100-watts.

But if it has a heater, it can use up to 1400-watts. As we all know, bathroom fans should be used for a specified period and should be turned off afterward.

You can control your bathroom exhaust fans using countdown timers and humidity sensors to turn them on and off to save energy.

To know the amount of electricity your bathroom fan uses, first, you will need to know its wattage when at maximum speed.

You will then convert it to kilowatts and multiply it by the cost per kilowatts.

Can I leave my bathroom fan on 24/7?

No, you cannot leave your bathroom fan on for a whole day; it might pose a fire hazard if the motor overheats.

Bathroom fans get clogged by dust and lint from tissue paper or towels on a regular; when left on for too long, they will overheat, or anything could go wrong.

And the heat will ignite the light hence a fire outbreak.

As much as there have not been conclusive evidence of bathroom exhaust fan related fire outbreak, they are a significant problem and should be handled with care.

You can do the following to your bathroom exhaust fan to keep them well maintained.

Make regular checks on the fan to ensure the rotor blades are spinning when the fan is on. 

The fan should be left on for a short while, 20 to 30 minutes, and for a whole day or overnight as this could pose a significant fire danger.

Lastly, always clean the fan by removing the dust and lint every once a year. It has also been found out that worn-out bearings in the bathroom fan motor can cause a fire.

These bearings wear out due to prolonged use of the fan even when not necessarily needed.

If the bearings are extremely worn, they will cause the motor to freeze, and so the fan will overheat to temperatures reaching 340 degrees.

At a heat of 340 degrees, the lint trapped in the fan can be ignited, and there will be a fire.  

People tend to leave the bathroom and forget to turn off the bathroom fans, and when the next person comes in.

Do Bathroom Fans Remove The Smell?

They will turn it off but then turn it on again, not knowing for how long it had been left on before.

So, to avoid such scenarios which might lead to fire outbreaks.

You are advised to install a moisture sensing switch that will automatically turn on the fan when it senses the presence of moisture .

And off when the moisture is completely sucked in the bathroom fan. 

Do Bathroom Fans Pull Air From Outside?

No, bathroom fans do not pull air from outside. Bathroom fans suck in moist air into the ductwork, which exits the house through a vent.

Bathroom fans are installed so that they can remove humidity, stagnant air, and foul smell from your bathroom, allowing you not to open your windows.

Bathroom fans are usually installed in the ceiling or can be installed in the bathroom walls.  

Why Does My Room Smell When The Window Is Closed?

We find it weird when our rooms are smelling, not knowing the apparent cause of the fouls smell.

If the room smells musty, it might be because of microbial volatile organic compounds (mVOCs).

MVOCs have a strong unpleasant smell that makes the room smell musty and related to mold growth.

Molds can be found anywhere in your room, and they do have an unpleasant smell; they are also a health hazard to human beings.

Having your windows open regularly allows fresh air into your room and rids off the stagnant air that traps all the foul odor.

As much as molds could be the main reason your room smells when windows are closed, there are several other reasons as well. 

Stagnant air. Stagnant air in your room tends to trap airborne substances like mold spores and dust from all over the room, including dirty clothes.

The airborne particles are mainly trapped on hot, humid days, and when the window is closed, there will not be fresh air entering the room to break down the stagnant air. 

The presence of dirty laundry in your room could also be a probable cause for it to smell bad.

A study conducted and published in the Journal of Chromatography stated that underarm sweat does not smell until it comes into contact with bacteria on our skin.

The bacteria on our skin makes the sweat smell, so having all these dirty laundries pile up in your room will have the room smell. 

Leftover food is also another cause for your room to have a bad smell.

As there could be no evident signs of food particles in your room, the old stains and spills might cause the smell if not cleaned.

Lastly, dust composed of pet hair, dead skin, and dirt can make your room look dirty, and that’s not all;

It will also interfere with the fresh air in your room, making it smell musty.

Leaving your window open to allow fresh air in the room is good for getting rid of the foul smell, but first, you should check the day’s air quality report before opening your window.

Should I leave my fan on when the lights are off?

No, you should not leave your fan on during lights off.

That means, when going to bed, you should ensure the fan is off to avoid things like congestion, allergies, muscle aches, and dry eyes and skin.

Such problems can prove to be a health risk with prolonged use of the fan during lights off. 

Can Bathroom Fans Burn Out?

Yes, bathroom fans, just like any other fans, can burn out. Often homeowners neglect bathroom fans during maintenance, and this could lead to significant problems.

Severally, homeowners tend to turn on the bathroom exhaust fan when taking a dump or shower to clear the humidity and smell in the bathroom.

When you leave the fan on for too long, it might break or overheat, igniting the combustive lint particles and the framing materials on the fan. 

Bathroom exhaust fans are made up of low torque AC motor; the motor is attached to a rotary plastic fan in the metal compartment.

With time, bearings wear out and eventually stop working, making the motor stops spinning.

The electrical current draw of a bathroom exhaust fan is usually little under normal conditions but will multiply when the motor stops working.

The heat is not enough to trip the circuit breaker, but it is high enough to overheat and trigger a fire.

There are various things you can do to prevent your fan from burning out or spoiling; 

Inspect and clean the fan regularly. When the fan gets clogged, it increases the chances of the motor windings overheating.

When cleaning the fan, you should also check for discoloring of the motor winding insulation to know if the fan is overheating or not.

Should the outer insulation look like it has patches of dark brown coloring, then it means you should replace the fan. 

Installing new fans or replacing the old models can be worth preventing a burnout that might lead to a fire.

If your bathroom fan indicates it was manufactured before 1990.

You should consider replacing it with the new ones incorporated with thermal switches, which will turn off the fan before a fire breaks out.  

How Powerful Should A Bathroom Fan Be?

Bathroom fans use electricity in relation to the amount of air they can move; this is usually measured in CFM (cubic feet per minute).

You need to have 1 CFM for every square foot of the room area. The minimum size a fan can be is 50 CFM, which is 42 square feet.

The duct size also increases as the CFM size increases to around 6 inches.

When it comes to bathrooms as big as 100 square feet, the fans will be sized according to the number of fixtures in the bathroom, like bathtubs, a shower, or a jetted tub.

The size of the fan keeps increasing according to the size of the bathroom, the height of the bathroom ceiling, and the number of fixtures in the bathroom.  


Bathroom fans are designed to remove humidity and dust from bathrooms by sucking them into the ductwork and taking it out of the house.

We often find rooms smelling whenever the windows are closed. Rooms smell because of various reasons.

If the room has a musty smell, it means there is a presence of mold.

Your room could also smell because of stains or spills that you did not clean before; it can also smell because of the dirty laundry piled up in the room.

It is advisable always to open your window to allow fresh air into the room to break down the stagnant air in the room.

Bathroom fans are not supposed to be left on for a long time because their motor windings can heat up and ignite the lint and dust particles trapped in the fan.

Bathroom fans are always turned on after using the bathroom to absorb the humid air and foul odor, but it should only be 20 minutes. 

Another thing, bathroom fans do not pull air from outside because they work in a way that sucks the humid air in the bathroom and vents it outside the house.

Fans are not supposed to be left on during the night as it might pose a health issue when prolonged for several nights.

As much as people find it to be relaxing because of the cooling effect it leaves, it is not safe. Bathroom fans can burn out when it overheats.

Overheating can be caused by stalling of the motor due to the motor bearings wearing out.

When the motor bearings wear out, the motor freezes, which makes it stall hence overheats, and this can ignite the lint particles clogged in the fan leading to a fire outbreak.  


Hi! I' am Tom. I was a manager in one of the biggest stores for over 10 Years, am also an SEO by night. I don't like to call myself a blogger; they are very analytical, do email marketing, and know all SEO stuff. I faced many questions from customers about different products, and there was hardly any help on the internet. After learning all the things about these products as a manager the hard way, I decided to start a blog and help other people.

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