How much heat does a VAC 70/70 emit?

I am considering a VAC 70/70. However, I live in AZ so heat output can be a problem. The heat output from either my VAC PA100 or Phi 110 does not present a problem in my room. Since the 70/70 has eight 300B's and runs class A, would it have double the heat ouput of my other two amps which use four KT88's, or maybe even triple that amount?

I tried an ARC VT100 once in the summer time and the room was unbearable after an hour and I don't want that.