I have no idea how much air conditioning we need for a 28′ bus, but I believe this unit should eliminate the need for a fridge. This is the biggest unit that Coleman makes. It’s the grand daddy of A/C units. We purchased them from some mobile RV repair guy in Palm Beach Gardens, FL. The jury is still out on how well it works, or if it works. $250!
But what we did get was some really good Tacos in Palm Beach Gardens at Chula Taco or Taco Chula. Regardless, they are the real deal. Great tacos!