In house? I hope your neighbors are far away. I just mine a mix of four units at the home otherwise I feel like there'd be a riot with pitch forks. Mostly from the wife. ..
No I have a small warehouse with a single bay mechanic shop type setup. I have a custom built huge rack that is like 8ft tall x 25ft wide and it holds over 100x rigs. I have the entire backside of the rack lined with insulation and the hot side of the rigs pops through the insulation. The bay door is permanently raised like 4ft with a big custom metal vent along the bottom of the bay door that spans the entire width across. with 4x 42 fans up against the vent / grate to spit all of the hot air out into the atmosphere. My only neighbors are a bunch of other mechanic shops. Its pretty damn noisy and a lot of hot air is flying out of the vent / grate. So far no complaints tho lol. Fingers crossed!!
Its kind of like a wind tunnel type setup. Its kind of unique I think...?
This sounds pretty sweet, You have pictures of the exhaust set up floating around?