Drivers A/C & Heat

[luvrbus]

I have no idea on how to figure btu for a bus on dash air all I know is most are in the 30,000 btu range  even on automobiles and pickups they are 20,000+ btu range our S&S job has a 32,000 btu Pro Air for dash air

good luck

[robertglines1]

that's good to know. I was just going by the aux air figure. don't really madder just as long as it blows cool on me ;DPS and keeps Judy happy also!

[Dreamscape]

I do know you want to size it for the load. If it's too big and cycles off and on, it will shorten it's life. That's why I thought someone would know how to size the compressor for what Doug has in the front.

[luvrbus]

I haven't owned a dash made in the last 20 years air that would cycle off and on they are tied to heater to mix the air for temperature control some do cycle on idle for engine heat control and don't seem to cause a problem.
All the compressors now are rotary they like turning all the time I cannot see a problem myself  
He sure doesn't want one to cycle in a bus with 80 feet of hose all he has to do is call the manufacture they will size the compressor for the length you see buses with 2 compressors sometimes for the dash air.
That is not really his problem he is going to need the right diameter of clutch on the compressor they are designed to turn so many RPMs for the model to achieve the capacity of the compressor and the unit been there done that lol these guys helped me out www.ackits.com  they sold me the right stuff and he can ask questions on their forum

good luck