I have a 40 x64 garage and looking to install a ceiling mounted propane heater. The garage has ceiling fans which are 12 foot high. The building has spray foam. The question that i have been looking to find out is should I consider installing two smaller heaters one on each end of the building? 64 feet seems like quite the distance f to have the heat uniform. I was considering putting the thermostat (connected to both heaters) in the middle of the room so when there was a call for heat both heaters would come on. Any thoughts are appreciated