Better Fresh Air Venting Plan

[e46er]

Originally Posted by craigwmiller

If the humidity is higher outside, venting air from inside to out will draw more-humid air from the outside back in -- just making things worse

If this is for a fish room which I assume you only need a small fan pushing 80 cfm to run a few minutes every couple hours I'd guess meaning it will take along time to get a negitive pressure in your house that will draw in the more humid air.

No different than turning on a bathroom fan when you shower every morning