Front Return Air Handlers - Single Stage

Convertible options that fit your space.

As a part of our comprehensive selection of quality HVAC equipment, we offer air handlers with various configurations such as our front or bottom return air handlers. From compact and adaptable two-stage front return air handlers to premium efficiency air handlers, customers can select the heating and cooling equipment best suited to their space. Furthermore, this system’s all-aluminum coils, optional factory-installed heater kits, and more provide reliable, value-friendly temperature control. Discuss both Durastar’s single-stage and two-stage front return air handlers to determine which fulfills your heating and cooling requirements.




No one stands behind their brand like we do. Durastar offers durable airflow during even the harshest heating and cooling conditions. In addition, our warranty provides maximum coverage for total peace of mind.

Extended warranty options are available for both parts and labor. Talk to your contractor for more information.

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Front Return Air Handlers - Single Stage Features

  • HVAC equipment products sold to licensed contractors only. Products sold in select areas only, please contact your local branch for availability in your area.
  • Not all Durastar products may be available in all areas currently. See your local Durastar distributor for details.
  • Sturdy steel cabinet with one inch of foil faced insulation for quiet and efficient comfort.
  • Front or Bottom Return with Aluminum Indoor Coil Design: Constructed of aluminum fins bonded to internally grooved aluminum tubing and are more corrosion resistant
  • Less than 2% Cabinet Air Leakage at 1-inch H2O: When tested in accordance with ASHRAE Standard 193


  • BTU: 18000
  • BTU Cooling Rating: 18000 Btu/h
  • Blower Type: Multispeed
  • Coil Type: N
  • Communicating: Non-Communicating
  • Configuration: Front
  • Fan Speeds: 2
  • Height: 36 in
  • Max CFM: 675 cfm
  • MBH: 18
  • Phase: Single Phase
  • Power Source: Electric
  • Refrigerant: R-410A
  • Refrigerant Control: TXV
  • Specifications - UL Listed: Yes
  • Stages: Single
  • Style Name: DRF1PA
  • Tonnage: 1.5 Tons
  • Type: DRF1PA1821ASTNJN0
  • Volts: 208/230V
  • Weight: 80 lb
  • Width: 21-1/2 in

DRF1PA1821ASTNJN0 Documents

Frequently Asked questions

Is an air handler or furnace better?

Both Durastar’s furnaces and air handlers offer dependable options for distributing even airflow throughout your home. When selecting between the two, consider your location and climate. For areas with long warm seasons, an air handler will likely be more energy-efficient, however, we recommend discussing your options with a licensed contractor to ensure the best combinations of HVAC products for your home.

What does variable speed mean?

Variable speed air handlers operate at the lowest possible speed to achieve your desired indoor temperature. This results in increased energy efficiency. Variable speed units are also quieter than standard units.

Is a two-stage air handler more efficient than a single-stage air handler?

Yes, when paired with a two-stage outdoor unit, both units will operate on low capacity during milder days, requiring less energy; and switch to full capacity and power when needed.

What is an inverter compressor?

It is a compressor that seamlessly adjusts speeds to ensure the lowest energy output. Unlike standard compressors which may turn off and on repeatedly until the temperature is achieved, inverter compressors operate with a drive that modulates its speed, using minimal power to maintain your desired indoor temperature. As a result, these types of compressors use significantly less energy and have a longer life because they are not turned off and on to full power repeatedly.

Inverter compressor diagram

What are the differences between variable speed, ECM, and PSC blower motors?

A variable-speed blower motor offers the most efficiency and adjusts speed to maintain consistent temperature control. It can also detect your home’s static pressure. Furthermore, if ducts are dirty or clogged it will automatically adjust to maintain constant airflow. In comparison to other types, variable-speed motors offer superior dehumidification because of their ability to operate at low RPMs. This results in a more comfortable space. ECM, or electronically commutated motors, are equipped with a regulator so you can select the most efficient settings for your home. Then, it adjusts its torque to maintain your desired indoor temperature. This is slightly different from variable speed motors in that they adjust to maintain a constant CFM (or airflow). PSC, also known as a permanent split capacitor, runs at one constant speed.

How to talk to your contractor

Learn how to talk the talk with a few of our top tips. We cover important questions to ask your HVAC contractor, common mistakes when buying a new system, and more.

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