Lennox’s MLA cold climate mini-split heat pump is specifically designed to operate in severe climate conditions by maintaining 100 percent capacity at 0 degrees F and can operate down to -20 degrees F. The MLA also offers efficiencies up to 24 SEER (Seasonal Energy Efficiency Ratio) and 11 HSPF (Heating Seasonal Per- formance Factor) and is available in a broad range of both single and multi-zone sizes. The MLA unit is compatible with all four Lennox indoor unit styles: high wall, cassette, medium static thin duct, and ceiling/floor.