Mine is a 4 ton Payne, it sits on the roof, the place is 2k sq ft, we NEVER turn the air on but in the winters use the heater. The problem here is the bedrooms are downstaris and in the winter they never get warm. The builders didn't put very big ducting in the place so it doesn't pump down that far. Always cool downstairs even in the summer. We have to use an electric heater during the winter to keep the chill off downstairs. The unit is on the roof behind the chimney. Yes, they had to have a crane to put the new one on last year.
