Absolutely.
The main idea with RHP's is that they maintain your hot side temp, and in turn will as a by product so to speak, maintain ambients and cool side temps.
I had 2 RHP's in a 4x2 cage once and it worked "OK", but for the price, it wasn't practical. The temps also fluctuated wayyyy too much for my liking.
Why not heat your room and just use an UTH?
Is that do-able?