Although a dual fuel system is a much greater investment than the traditional combination of a boiler & a/c, the benefits help to reclaim the cost.
The difference is the heat pump.
A dual fuel system combines an electric heat pump with a natural gas boiler. In cooling mode, a heat pump operates almost identically to a central a/c. It works by pulling heat from the air inside the home & transferring it outside by way of refrigerant. When the weather cools off, a heat pump is able to reverse the operation entirely. It finds ambient heat in the outdoor air & sends it back indoors. The process avoids the burning of fossil fuels to create heat. No combustion eliminates problems over carbon monoxide, carbon dioxide, fumes, sizzling surfaces or redcabin gasses. Heat pumps are appealingly environmentally responsible. They are also safe, wash & energy efficient. Modern heat pumps feature stretchy speed technology that allow the system to automatically adjust capacity anywhere between 40 & 100%. Running at lower speeds for longer cycles not only keeps costs to a minimum however helps with dehumidification. Heat pumps cost much less to operate than a boiler. However, once the outdoor temperature drops below frigid, a heat pump struggles to be effective. There’s not enough heat available in the air & the system fails to keep up with demand. At this point, the boiler automatically assumes the responsibility & runs for as long as necessary. With a dual fuel system, the most advantageous source is used at any given time, ensuring ideal comfort no matter what the weather brings.