SpacePak’s Solstice line of air-to-water heat pumps features the added Solstice Extreme. It comes with enhanced vapor injection technology and a high-efficiency condenser. It provides up to 48,000 Btu/hr. at 0° F. It uses hydronics as the primary source for both heating and cooling. Ideal for zoning, the units can be used in conjunction with one of the company’s hydronic air handlers for distribution to the occupied space. All refrigerant is sealed in a powder-coated galvanized steel cabinet located outside the occupied space. SpacePak.