How Many Heating and Air Contractors Does a Residence Have?

It might be time to start asking the question: how many heating and air contractors does a residence have? The simple answer is too many, but there is a certain logic to it. For instance, if the residence where you live has at least one bathroom, then that home technically has three contractors: the plumber, the electrician, and the heating and air technician. If there is an attached garage, then there are three contractors: the carpenter, the roofer, and the plumber.