Chiller

[kari]

What I meant by dual controller is that a temp sensor triggers the on/off function of your chiller as well as your heaters. Some chillers have the controller built-in with a recepticle where you can plug in your heaters. Other chillers have remote contollers not built-in (eg. CSL if I remember right.) Some only control the cooling part and you rely on the heaters built-in switch. In the last example you may either run in to a situation where the heaters are on while the chiller is running or a temp fluctuation.