The Trane Thermafit Air-to-Water Modular Heat Pump Model AXM is a fully electric modular unit that owners can scale to match a building’s heating or cooling load. The Model AXM moves heat rather than generating heat; thus, it can be three times more efficient than other forms of electric heating. The Thermafit modular product line includes the Model AXM and eight product families that bring buildings into the future of sustainable comfort. By combining individually controlled AXM modules to create a single, larger heat pump, operators can right-size heating and cooling performance to meet a wide range of applications.