Lennox® heat pumps are the smartest solution for milder climates, where they can provide energy-efficient comfort during every season of the year. Even on the most humid days, Lennox Precise Comfort® technology keeps temperatures exactly where you set them, using only the energy that’s needed.

SL18XP1 Single-Stage Heat Pump


The quietest and most efficient single-stage heat pump you can buy.

With a SEER of up to 18.50 and an HSPF of up to 10.20, the David Lennox Signature Collection SL18XP1 can save you hundreds of dollars per year in energy bills through all types of weather. Its Innovative SilentComfort™ technology combines thick insulation, vibration resistance and a specially shaped fan blade to greatly reduce sound levels. The condenser coil is the part of the unit that draws hot air from inside your home and releases it outside. The Lennox Quantum™ coil handles the heat like no other. It’s constructed from aluminum alloy, helping it resist corrosion in harsh conditions like coastal environments.


Efficiency Rating (SEER)
Up to 18.5
Efficiency Rating (HSPF)
Up to 10.2
Energy Star®
ENERGY STAR® Qualified
As low as 67 dB


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