There is such a thing as an HVAC unit that is powered by the sun! As a matter of fact, there are now several HVAC units on the market that are powered by solar panels.
The first solar HVAC unit to be sold on the market was the solar multi split air conditioning system.
Multi Split air conditioners are complex cooling units, and they can take a lot of electricity to run. Many schools, stores, and churches have multi split air conditioners, so the development of solar multi split cooling units was huge. Nearly every store these days has a solar air conditioning system. Another common solar HVAC unit is the hot water boiler heating unit. While this heating system is typically hidden in closets in corners of the house or in basements, there is still a way to power a boiler through a solar panel. Many heating and cooling businesses did not think that the solar powered boiler would not sell well, and many decided not to sell the solar hot water boiler heating system at all. These stores would come to regret this. The HVAC businesses that did sell the solar boilers found an unsatisfiable market for them. Everyone who had a hot water boiler heating system in their house wanted to get a solar panel for it. Why would customers want this? You might ask, well, since solar panels get energy from the sun and transfer it to your boiler or air conditioner, there is no need for electricity. Those who have a solar panel to power their central air conditioner or boiler do pay much at first to purchase their solar panel, but it is worth it.