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What size cfm bathroom exhaust do I need?
I have a 140 sf bathroom with 9 foot ceilings. It currently has a Nutone 50cfm exhaust installed, but I get tons of condensation on the windows with showers. The roof has a vent for the duct with a connection for 4" ducts. I understand that 4" ducts typically only can handle up to 100cfm of flow. Do I install a high output (150cfm+) exhaust system with 6" ducts to accommodate the size of the bathroom and replace the 4" roof vent to a 6" one when I replace my roof next year? I'm concerned that if I do this, I'll burn out the motor from resistance while using it with a 4" roof vent in the meantime. OR, do I get a 110cfm exhaust and hope it does the job with the 4" ducts? submitted by /u/ragingbullbob [link] [comments]
I have a 140 sf bathroom with 9 foot ceilings.
It currently has a Nutone 50cfm exhaust installed, but I get tons of condensation on the windows with showers.
The roof has a vent for the duct with a connection for 4" ducts. I understand that 4" ducts typically only can handle up to 100cfm of flow.
Do I install a high output (150cfm+) exhaust system with 6" ducts to accommodate the size of the bathroom and replace the 4" roof vent to a 6" one when I replace my roof next year? I'm concerned that if I do this, I'll burn out the motor from resistance while using it with a 4" roof vent in the meantime.
OR, do I get a 110cfm exhaust and hope it does the job with the 4" ducts?
[link] [comments]
