Lennox’s new extreme cold heat pump operates at as low as -20F
Image: Lennox Lennox Residential HVAC has launched an extreme cold climate heat pump that warms a house with low global warming potential (GWP) refrigerant in temperatures as low as -20F. It’s called the Dave Lennox Signature® Collection SL22KLV Cold Climate Heat Pump , and Lennox claims its efficiency levels are 150% higher at colder temperatures than standard heat pumps. In 2022, Lennox was the first company to complete the first phase of the US Department of Energy’s (DOE) Residential Cold Climate Heat Pump (CCHP) Technology Challenge, and the SL22KLV is a souped up version of the unit developed for that challenge. The heat pump, which pairs with a smart thermostat, uses a variable-speed compressor with Electronic Refrigerant Injection (ERI) to adjust the energy usage based on the outside temperature, which helps to lower energy costs. When the temperature drops, the ERI increases heating output efficiently. Advertisement – scroll for more content The SL22KL...