When I built the addition on the house, I also put on a 26'X28' garage.
12' ceiling height and a 18'X8' door .
I also put radiant tubes under floor so the cars can keep their feet warm
.
Pull in w/ ice and snow and a couple hours the car and floor is dry.
Works great except some warm days in the spring and fall when it 90 degrees plus in there because it is on the zone for the basement and the thermostat is there too.