Humidity control


Premium Member
Hey folks,

I'll be getting my basement finished soon and plan on starting a large tank (300-ish gallons). My wife is worried about humidity. I did some research and the answers are all over the place, suggesting anything from fans, to HRV, to whole house dehumidifiers. I'm thinking the answer probably depends on the specific situation.

In my case, the tank/sump will be located in a large open space in the basement. We have 3 Lennox HVAC systems (one for each floor), and they all have humidity control built in (I believe it's achieved through variable speed operation during AC mode - but not heat). The house itself is about 7,800 sqft including the basement, so there's a lot of space for the humidity to spread around. The air can move freely between floors. Should I be worried about humidity? If so, what would be the appropriate way to control it?



Active member
I wouldn't be too concerned until I knew I had a problem. Get a humidistat and place it in the basement to see what your humidity levels are. If they are high get a dehumidifier.


New member
300 gallons should be okay. I run a dehumidifier but I run a lot of surface area in a 800 sq ft basement.

I do monitor my humidity with this thing


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