HVAC technicians typically have to be more experienced with wiring and electrical systems than plumbers. Your plumbing system typically won't need electricity, whereas your HVAC system is the biggest energy consumer in your house.

Air conditioners do not provide heating, but heat pumps do. Thanks to a reversing valve in the outdoor unit, a heat pump system works by extracting heat energy from outside air, even in extremely cold temperatures, transferring the heat inside the home, where it releases the heat into the air.