Quieter than any other single-stage heat pump Lennox’s patented SilentComfort™ technology and unique design make the SL18XP1 the quietest single-stage heat pump you can buy.* Save energy, save money as the most efficient single-stage heat pump you can buy,* the SL18XP1 means smarter energy use. Efficiency ratings of up to 18.50 SEER and up to 10.20 HSPF can help lower energy bills, for savings that can add up to hundreds of dollars over five years.
SEER stands for “Seasonal Energy Efficiency Ratio”and is a measure of the cooling efficiency of heat pumps. The higher the SEER, the greater your energy savings. Typical SEER ratings start at 13.00, but the SL18XP1 carries ratings as high as 18.50.