Direct die phase change.. it will be HELLA lot cheaper in electric then that damn peltier! PELTIERS TO HELL!
Besides.. 2500BTU is enough.. what HP is the compressor? I would charge it with almost all propane and a tiny bit of 134a to add weight to the propane and to take care of the flamable propane.. You'll be set then..
Bowman is the expert resident on DIY direct die.. that is my next plan.. Next summer I'll probably build a direct die unit for the hell of it..
I am going to get my EPA green card probably.. costs 20 bux and u do an online test.. if u pass you get to print out an EPA green card.. that is good until you get the real deal in the mail.. That will let me buy shit like R-12.. R-404B I think.. which can be used in R-12 systems with no problems at all.. don't even need to flush it.. plus R-404B is on par price wise with 134a.. so it's good.. n cheap..
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