I realize this thread is a little old, but just wanted to make a point that making the air "cold" is not as important as creating enough air flow. The ideal setup for S9 is to have a negative pressure room for the exhaust and a positive pressure room for the intake, even in the dead heat of Florida in the summer, this concept works very well at room temperature believe it or not, as long as ambient is not too hot. Typically miners are happy at up to 80 degrees if there is sufficient air flow. Making a room cold doesn't do anything for you if you can't allow the machines to breath and isolate them from the hot exhaust air. How you achieve this is irrelevant, there are 100 ways to do it.

Very interested in one of these, please sign me up for batch 3!

Serious machine! Keep us posted about your next batch, I have no issue buying from you and would love to do business with you in the future.