We're in the process of building a two storey garage out at the lake with second florr being a bunk house of sorts. As this is primarily summer usage only, the only HVAC we have planned are some electric floor boardheaters to take the chill off in the early/late season. Now we want to do something for air exchange to cool off the rooms in the evening/night. We could install a bathroom fan but that seems undersized. Any recommendations would be appreciated. We're still in the framing stage so options are pretty open.
If you want something simple and cheap, and you aren't conditioning the space, you don't need to go all fancy on it - for the square footage you indicate, just get those window-mount fan units (usually has two fans in it). And definitely install ceiling fans in each room.... (meaning, typical decorator paddle-style fans)... heck, you can get those for cheaper than a window unit.