Is it just blowing into the one drying rack?Just finished mine. Ran mine outside at minus 22 deg celcius . At ceiling was warm and floor super cold . Gonna. need to do some revisions
If so, some sort of fan to move the air around and down may do the trick enough and is simple to do. Even with my heater on the floor, having a fan to move the air around makes a big difference. Hard to find a nice 12v fan though.