Need a description of the bus before being able to answer the question. Things such as age, model, make, size, amount of insulation in body (if any at all), & engine size all matter. If you would have more than 10-15 people on board, definitely need fresh air exchange or it gets really stuffy & smelly in short time. Further info. Spent about 7 years in the bus business. First outfit I worked at was basically school operation, but had 3 road coaches & one we called "Old Glory". That was a school body shell that had been refitted. IHC DV550 engine, air suspension, coach seating, extra insulation, add on a/c. The a/c was self contained, had its own engine to spin the compressor & fans. Was semi-comfortable at less than 80 deg outside temp if not parked in sunshine. After about 40k miles it developed so many body rattles that the boss traded it for another road coach. Rest of my bus time was spent in road coaches. Thick body insulation, sealed, tinted, double pane windows. A/c compressor was driven off the Detroit 8v71 or 6v92 engine. Condensor fan was electric, powered by 24 volt, 400 amp alternator. When that a/c kicked in, it would make the engine sag for a few seconds. More than you wanted to know. Willie
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Today's Featured Article - Magic Moments - by Tyler J. Woods. Magic moments don’t just happen. You have to help them along. This morning, I got up early. It is my day off from my regular workweek and I had a lot of things to do. It’s fall, and with winter coming on, there is a lot of work to do before weather closes in.
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