How Mitsubishi Mini Split Heat Pumps Work

Air source heat pumps are a highly efficient form of electric heating, that work on the same concept as your home’s refrigerator or a window air conditioner running in reverse. Rather than heating air molecules with electricity, they extract heat that already exists in outside air and move it into your home. This is possible even at temperatures well below zero. In heating mode, refrigerant is pumped through the outdoor unit, where it absorbs heat. The hot refrigerant is then pumped through the indoor air handler, where it releases the heat into the home. In summer, the unit works in reverse, extracting heat from the home and moving it outside, providing ultra-efficient cooling. Since the heat pump moves heat, rather than creating it, it is much more efficient than traditional electric heating systems, and in fact has an overall efficiency of 250%. Read more