Ventilation in Reef Room

[One_Divided]

Hey guys, any advice on best way to air exchange my garage where all my tanks are?. It's too hot and muggy in the summer and the humidity is a major issue in the winter.

I have used a dehumidifier in the winter (which works well), but it can only be run at night, generates quite a bit of heat and uses a lot of power.

The other thing I looked into was HRV, which might be good in the winter, but apparently they do not cool for the summer, just bring in new outside air and retain temp.

I have a couple fans pulling air in and out, but they are just small 4" fans. When the garage door is left open a couple feet, it helps a lot in the summer.

Any other suggestions would be much appreciated.