Heating the whole house...

[Garmins dad]

It is 12"x12". I've found that the blower in the A/C unit moves too much air and even though the air going into the register is warm/hot, by the time it blows out it is very cool. Still working on that piece of the puzzle. Hope this helps ya out.

Sounds like you need a slower fan in your system.

 

[Arbonaut]

Sounds like you need a slower fan in your system.

Sound like the compressor is coming on. That could do some damage in cold weather. Make sure you divorce the compressor from the circuit.