But I also just got done with all the electric upgrades and was ready to move them all to a rack thats has a window behind it. Just something as simple as moving them and haveing the hot exhaust blow straight out the window even with a screen sent most of the heat outside. and it didnt take long till the air temp in the garage was down only about 6 degrees more then it was outside. So just that did more then a big window fan was doing. But I knew I could not keep them that close to an open window permanently and still wanted to get more of the exhausted heat outside without it mixing with any of the incoming air. So today I finished off the project with 3d printed fan shrouds and 2 feet of dryer vent hose on the back of each miner. Then I used a pcs of wood with 4-inch holes cut out that the ends of the hoses go threw and cut to fit in the window frame so I can seal out the elements. Now my chip temps are lower then what was normal even on some pretty cold nights and my fans are running a heck of a lot slower then even too. So I think even in the hottest days of summer It will not be any ware near as hot as the garage got on Sunday.
I humbly want to provide some input in regards to cooling.
I have some experience in cooling. Mostly with servers, less with ASIC miners. On a rack, the servers at the bottom will always be cooler due thermodinamics. Exhaust heat will rise. So in general try to put all your miners at the lowest level near the floor so that they get the coolest air. In multi level houses basements are a good place to locate them. Don't aim the miner's exhaust in such a way that is hits the PSU or another miner. Also if you have to stack them don't stack them directly above. If possible use metal racks that can also help in dissipating heat much better than wood or other materials.
