what is the best size pump for a homemade A/C? Answered

Are we talking about an evaporation cooler A/C water pump ? ?
The you only need a 1 or 2 gph centrifugal pump.

A

Pump sizing depends on the expected load. Estimate that, and then look for variou HVAC sites which can help with the rest. Unless you have access to some pretty expensive tools, making an A/C is very very hard.

Steve

About this big:
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L

_{If that's not helpful, how about giving us some more information? A lot more...}