The System M consists of a sleek, quiet, inverter-driven outdoor heat pump that can be up to 4 times more efficient than a gas furnace, the company says. A plug-n-play appliance, its packaged design makes installation less intrusive; no refrigerant or gas lines are needed. System M integrates with almost any high-efficiency heating and cooling system. The installation time is decreased by eliminating the work to design, procurement and installation of all the required hydronic components. Just 6 connections needed; 2 connections to the heat pump, 2 connections to the domestic hot water tank (DHW) and 2 connections to the heat and cooling system. Booth #B1639.