the heat capacitors seem to exchange heat primarily to each other. You're have a heat exchanger that can exchange, say, 20 per tick transfer 20 from his own 20 to another's, say, 2000, which will also exxhange 20 to the first. the levels will never move. The heat exchanger will simply not work next to a fan, it doesn't exchange to it properly, if at all.
... Quite bad, actually... just not fun, frustrating, upgrades are too slow... Gave it a 1 (not because it's astonishingly awful, but because it is overrated...)
 "Upgrade Complete 3"){kind=icon}
 "Idle GameDev"){kind=icon}
 "Frozen Islands"){kind=icon}
 "Reactor Incremental"){kind=icon}
 "Idle Evolution"){kind=icon}
 "Witch Hunt"){kind=icon}
 "Up in the Sky"){kind=icon}
 "Sandbox Hero"){kind=icon}
 "FPS-MAN"){kind=icon}
 "Human evolution"){kind=icon}
 "Dueling Blades"){kind=icon}
 "Striker Superstars"){kind=icon}
 "Space is Key 2"){kind=icon}
 "Axon"){kind=icon}
 "Kick Out Bieber"){kind=icon}
 "Last Robot 2"){kind=icon}
 "Cartoon Tanks"){kind=icon}
 "Cuboy: Cubeture 2"){kind=icon}
Trying hard to! :) Hang in there