Bathroom Fan Door Gap

Anyone know how many cfms a decent bathroom vent fan can pull under a 2 8 door with a 1 gap at the bottom if there is make up air available outside of the bathroom.

Bathroom fan door gap.

Or about the size of a 4 1 2 diameter hole. Remember above we mentioned having a super powerful cfm fan and the need for the air it s moving out be replaced in. A 1 2 gap on a 32 door is 16 sq. The nutone white 50 cfm exhaust bath fan the nutone white 50 cfm exhaust bath fan with light combines efficient air circulation and up to 100 watts of illumination in one easy installation.

If the door to the enclosure is closed and there s no gap at the bottom of the door the fan will be starved of makeup air and will perform poorly. When your exhaust fan isn t operating at its peak then you re putting your home at risk for ventilation problems that will only get worse as time goes on. That s adequate for most bathrooms. Whenever weather permits open the window during your shower or bath and leave the window open for.

For drawing air into the bathroom your exhaust fan is only 4 so there will be no imbalance. Btw not sure how it is elsewhere in the country but around here the bathroom vents are usually installed and supplied by the electrician. What other things do i need to consider before i purchase a bathroom fan. If your bathroom doesn t have a fan take advantage of the door and window s to let out steam.

A typical goal is that this pressure difference should be held at no more than 2 5 pascals when the fan is operating. The fan and light operate separately or together and are housed in a classic white design that complements any decor. If the gap under the door in an enclosure is less than 5 8 inch you should leave the door slightly ajar when using the toilet or shower with the enclosure s vent fan running. The nutone white 50 cfm exhaust bath fan the nutone white 50 cfm exhaust bath fan with light combines efficient air circulation and up to 100 watts of illumination in one easy installation.

Unless your bathroom has a large gap between the bottom of the door and the floor or some other way for air to get into the bathroom the bath fan will quickly be pulling against a pressure that makes it difficult to move much air. A 1 5 gap is like having an 8 diameter hole. A gap of 1 inch between the finish floor and a 30 inch wide door can provide 47 cfm of return air at a maximum 2 5 pascal pressure difference. Even if it were closed a very small gap would simply slightly limit the air pushed into the room from the hvac.

The exhaust fan keeps your home well ventilated improves air quality helps to remove moisture from the bathroom and prevents mold growth. The fan and light operate separately or together and are housed in a classic white design that complements any decor.