It isn't uncommon to have multiple HVAC units installed in homes to help keep temperatures consistent. It is especially helpful in larger homes or homes with multiple levels where it is harder to keep the upper floors cool in the summer.
Heat pumps are an efficient and energy saving way to provide heating and cooling to your home. Installing a new heat pump can save you between 25% and 50% on your utility bill. These systems not only heat your home in the winter by absorbing heat from outdoor air, they also provide cool air during the summer months by removing the heat from inside the home and recirculating cooler air.