We are currently reassembling a brewery that was taken apart 1 1/2 years ago and thought that our exsisting compressors and coils would be sufficiant, but according to the refrigeration man they are undersized. Our conditioning room is roughly 550 sq feet and is extremely air tight. two layers of sheet rock on both sides of the wall, r 19 insulation, two inches of foam board, and FRP on the walls. This is the conditioning room so there will be CIPing and cleaning happening in there 3 to 4 times a week. Any ideas on the compressor size we should use. We currently have a 3hp and he is recommending a 5hp. Also how many BTU for the evaporators to match the compressor. Thanks