It's better for both the environment and your wallet. Confused homeowner seeks advice after HVAC tech refuses to quote ...

it automatically switches from the heat pump to the furnace.” Johnson Controls-Hitachi Air Conditioning offers three versions of the dual fuel system, weighing from 30.6 kg to 38.1 kg.

An international research team has developed a dual-source heat pump (DSHP) heating system that is designed for high water outlet temperature and low ambient temperature applications.

If you’re considering an upgrade to your home’s heating system, then make sure ... or look for a dual fuel or ccASHA heat pump. Look for Energy Star certification. If possible, opt for a ...

They found that the heat pump was best for comfort and cost $228 less per year to operate than a dual-fuel AC and gas furnace system. The graph below shows the indoor temperature in the four ...