Proudly Serving Hales Corners, Waukesha & Menomonee Falls
4SCU20LX-featured

4SCU20LX

High-Efficiency, Variable-Capacity Air Conditioner

  • Up to 20.0 SEER Efficiency
  • Pro Series Systems
  • True Variable-Capacity Cooling
  • Integrated Compressor Protection

MHT™ Technology

Armstrong Air’s proprietary heat transfer system. A specially designed fan shroud pulls air evenly throughout the air conditioner’s coil surface. The coil features rifled tubing to enhance refrigerant flow, while lanced coil fins increase surface contact between metal and air. All combine for maximum heat transfer and efficiency.

Product Brochure
Technical Specifications
Service Manual

Top Features

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 Thermostat

When you pair this model with the Comfort Sync 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.

Integrated Compressor Protection

Integrated Compressor Protection: The combination of both high and low pressure switches give additional reliability to each Armstrong Air cooling unit. The high pressure switch prevents operation in the event that refrigerant pressures exceed safe levels, protecting the compressor. In the event that your unit does not have enough refrigerant, the low pressure switch prevents the unit from drawing in moisture and other contaminants while operating.

MHT™ Technology

Armstrong Air’s proprietary heat transfer system. The coil features rifled tubing to enhance refrigerant flow, while lanced coil fins increase surface contact between metal and air. They combine for maximum heat transfer and efficiency.

*Due to Allied Air’s ongoing commitment to quality, all specifications, ratings and dimensions are subject to change without notice. Consult AHRI directory for the latest performance ratings.

Efficiency

Matched Indoor System

When properly matched with a variable speed furnace or air handler, your outdoor unit can, in many cases, provide an elevated SEER rating.

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.

Comfort

Microban® Protection

On Matched Armstrong Air Indoor Coil. Drain pans are infused with an antibacterial agent that destabilizes the membrane of microorganism cells, disrupting the cellular function of odor-causing mold and bacteria so that they can no longer grow or reproduce.

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™.

Quiet

Heavy-Duty Compressor Blanket

Greatly reduces operating sound so your outdoor entertaining is not interrupted.

Swept Wing Fan Blades

High-tech design allows for better sound control and is engineered for long-lasting durability. A heavy-duty insulation guard further reduces noise levels.

Reliability

Integrated Compressor Protection

Integrated Compressor Protection: The combination of both high and low pressure switches give additional reliability to each Armstrong Air cooling unit. The high pressure switch prevents operation in the event that refrigerant pressures exceed safe levels, protecting the compressor. In the event that your unit does not have enough refrigerant, the low pressure switch prevents the unit from drawing in moisture and other contaminants while operating.

Internal Monitoring

Your Armstrong Air air conditioner’s electronic control system prolongs system life by continuously monitoring internal components for optimum performance and fault prevention

MHT™ Technology

Armstrong Air’s proprietary heat transfer system. The coil features rifled tubing to enhance refrigerant flow, while lanced coil fins increase surface contact between metal and air. They combine for maximum heat transfer and efficiency.

Warranty

Armstrong Air’s commitment to a better product is backed by a 10-Year Limited Warranty on parts.

Comfort Sync Compatible

Comfort Sync Thermostat

When you pair this model with the Comfort Sync 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.

One-Touch Away Mode

Puts your system into an enhanced energy-saving mode when you leave.

Weather Data

Using its connection to your wireless network, Comfort Sync can display a five-day forecast and live weather alerts.