High-Efficiency Variable-Capacity Heat Pump

Pro Series™ Systems

Pair this model with a Pro Series™ variable speed furnace and a Comfort Sync thermostat, for optimum performance. With the Pro Series, you’re in control of every aspect of your home’s climate, as well as your energy costs. Explore the Armstrong Air Pro Series™.

Comfort Sync^® A3 Thermostat

When you pair this model with the Comfort Sync^® A3 Thermostat, the system will continuously monitor internal components for optimum performance. Comfort Sync^® puts you in total control of your home environment with remote temperature adjustment from anywhere in the world, even your couch, via smartphone app. When Comfort Sync detects that repairs and regular maintenance are needed, it alerts you or your dealer instantly, so your perfect environment never ends.

True Variable-Capacity Cooling

Rather than running at one or even two speeds, the 20LX Inverter-Driven Scroll Compressor changes its speed in small, precise increments and adjust cooling up and down like a dimmer switch. So temperatures are held exactly where you want them, even in extremely hot weather.

Up to 10 HSPF Efficiency Rating*

HSPF (Heating Seasonal Performance Factor) rates the energy efficiency of your heat pump. The higher the HSPF rating, the more efficiently your unit operates, saving you money on utility bills.

Up to 20 SEER Efficiency Rating*

SEER (Seasonal Energy Efficiency Ratio) rates the energy efficiency of your cooling equipment. The 20LX is up to twice as efficient as common legacy systems. The higher the SEER rating, the more efficiently your unit operates, saving you money on utility bills.

ENERGY STAR^® Most Efficient 2022

ENERGY STAR Most Efficient is a new program that identifies the most efficient products among those that qualify for the ENERGY STAR. Each product that receives this recognition demonstrates efficiency performance that is truly exceptional, inspirational, and leading edge.

Quiet Shift™ Technology

Allows heat pumps to enter defrost mode without excessive noise. Since refrigerant pressure is allowed to equalize before the switch, the heat pump can dissipate performance-robbing frost and ice quietly.

MHT™ Technology

Armstrong Air coils feature rifled tubing to enhance refrigerant flow, while lanced coil fins increase surface contact between metal and air for maximum heat transfer and efficiency.