But are bathroom fans interchangeable? Bathroom fans are interchangeable so long as you replace your fan with one of the same size and type. You should consider the fan’s ability to move air expressed in CFM (cubic feet per minute), duct length and size, housing size, sound, and features like humidity sensors.

Can I replace my bathroom fan with any fan?

Determine the Fan Size



It’s easiest to install a bathroom vent fan if you’re replacing an existing fan. You can use the existing switch, wires and ductwork. Also, it helps to get a fan that’s the same size as your existing fan so you won’t have to adjust the size of the ceiling hole.

Are most bathroom fans a standard size?





Bathroom fans are not standard size. The housing dimensions vary across different models. The duct size is standardized. On most bathroom fans there is a 4 or 6-inch duct.

How do you replace a bathroom fan with a bigger one?


Quote from Youtube video: So the next thing you need to do is cut up sheetrock. So the new fan can has a place to sit. Then I attempt to take the old fan out. And I try to do that with a drill.

How do you measure a bathroom exhaust fan for replacement?

How to Properly Size a Bathroom Vent Fan

  1. Calculate the number of cubic feet in the bathroom by multiplying the room’s height x width x length in feet.
  2. Divide the number of cubic feet in your bathroom by the number of minutes in an hour (60).
  3. Multiply that number by the recommended number of air exchanges per hour (8).

Are all bathroom extractor fans the same size?

Are bathroom extractor fans a standard size? Domestic extractor fans tend to come in two sizes: 4 inch/100mm and 6 inch/150mm. This size refers to the size of the impeller (the revolving part inside the extractor fan that sucks the air out).

Are there different size bathroom fans?





Choose a fan that can ventilate at least 1 CFM per square foot of room. So, for an 80 square foot bathroom, select an 80 CFM fan. For bathrooms 50 square feet and smaller, it’s recommended you purchase a bath fan designed for small rooms. In other words, choose under 79 CFM bath fans.

What happens if you oversize a bathroom exhaust fan?

A Bathroom fan should not be overpowered since this will waste energy, create excessive noise and could even pull noxious carbon monoxide into the home. It is OK to get a 20-30 % higher capacity exhaust fan than specified by the CFM calculator.

Are exhaust fans Universal?

Bathroom exhaust fan motors are not universal because motor dimensions, power output, and mounting locations are different across different models. However, it is possible to change the motor.

How do I know what size bathroom fan I need?

The rule of thumb is that you need at least 1 CFM per square foot of room area. To determine the square footage of your bathroom, multiply the length times the width. For example, if your bathroom is six feet wide and nine feet long, its square footage is 54. Therefore, it should have a fan rated for at least 54 ​CFM.

What is the standard bathroom fan duct size?



4” or 6” Duct for Bathroom Fan



The two most common duct diameters for bathroom fans are 4” and 6”, and there is a good reason for this. What is this? First, you need to know that the size of the bathroom determines the fan capacity you need (you can calculate the correct CFM rating your bathroom fan needs here).

Can I replace bathroom extractor fan myself?

Replace it Yourself



Replacing an extractor fan is a relatively straightforward job that can be done by yourself, as long as if you have some knowledge of disassembly and the correct tools. The existing wiring and ducting will need to be in good condition.

How often should bathroom fans be replaced?

You should replace bathroom vent fans every ten years. How long a bathroom exhaust fan lasts depends on use, vent fan quality, and maintenance. You should clean vent fans at least once per year.

Do I need an electrician to install an extractor fan in my bathroom?



This type of job requires a professional electrician for fitting bathroom extractor fans as any electrical work in bathrooms is considered high risk due to the damp and humidity, but you will likely have to decorate yourself to finish the job.

How much does it cost to have someone install a bathroom fan?

The average cost to install a bathroom exhaust fan is $380, with an average range of $240 to $550. The exhaust fan itself can cost anywhere between $20 and $500; fans with additional features, such as infrared heat or a light source, are priced at the higher end of the range.

Can I fit an extractor fan myself?

While you may be experienced in DIY, installing an extractor fan requires cutting holes through ceilings and walls, installing ducting and working with electrics. This process can be complex although it is worth noting that it is easier to replace an existing fan than to install a new one.

How much does it cost to replace bathroom exhaust fan?

Cost to replace a bathroom fan



Bathroom fan replacement costs $150 to $550 total on average. Homeowners should replace bathroom vent fans every 10 years. Fan and vent installers charge $50 to $100 per hour for labor, and replacement takes 2 to 3 hours. Wiring a new switch costs $100 to $250 more.

Does a bathroom fan need to be vented outside?



Note that the bathroom vent fan must always exhaust to the outdoors; never allow the duct to simply blow into an attic, crawlspace or other enclosed area.