Will I have trouble running a bathroom fan 10 CFM (25%) stronger than needed?

My bathroom measures in at 289 cubic feet. Dividing that by 7.5 and rounding up gives me a target fan capacity of 40 CFM. However, there are many more fans available at 50 CFM.

I read this post, Are there drawbacks to installing a stronger bath fan?, stating that a fan moving more air than necessary can inhibit appliance fumes from venting properly, not the mention the HVAC efficiency hit from expelling conditioned air.

My question is this: will increasing from 40 to 50 CFM create such problems, or is that in the realm of a much bigger increase?

Home Improvement Asked on November 14, 2021

1 Answers

One Answer

An extra 10 CFM won't hurt you at all.... If anything, it will get rid of the unwanted moisture faster. I'd wager that article was meant for much larger bathroom fans.

Answered by JACK on November 14, 2021

Add your own answers!

Related Questions

Does 3/4” pex supply enough water for a house

4  Asked on September 28, 2021 by frank-underwood


Water heater extra set of wires. Please help

1  Asked on September 28, 2021 by matthew-curry


Should an optical cable inside a house be run in conduit?

4  Asked on September 28, 2021 by pookieman


Flooring prep for epoxy Pebblestone

1  Asked on September 28, 2021


What is the best way to drain my patio?

1  Asked on September 28, 2021


Align two holes on the ceiling

3  Asked on September 27, 2021


What would cause my line sets to equalize in cooling mode?

1  Asked on September 27, 2021 by roger-kincaid


Installing Roof – What else should be done?

0  Asked on September 27, 2021 by monkeyseemonkeydo


Antique Schlage Door Knob – Can’t reassemble

4  Asked on September 27, 2021


Leak check mini split AC

1  Asked on September 27, 2021


Reverse osmosis for desalination?

1  Asked on September 27, 2021


Ejector pump instead of sump pump in basement

1  Asked on September 27, 2021 by lietus


How do I fix sticky KILZ primer?

2  Asked on September 27, 2021 by anthony-f


Ask a Question

Get help from others!

© 2021 All rights reserved.