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.

Learn More
Explore tax credits and rebates

DRAH1TA4821AMTNJA 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.
  • Adjusts airflow to help control humidity.
  • Lanced fin design provides increased performance and efficiency
  • Versatile 4-way convertible design
  • The most compact design available, all standard heat air handler models are only 42.5 to 57 inches
  • Indoor coil design provides low air side pressure drop, high performance and extremely compact size
  • Coils are tested at the factory with an extensive refrigerant leak check


  • Application: Residential
  • BTU: 48000
  • BTU Cooling Rating: 48,000 Btu/h
  • Blower Type: Direct Drive
  • CFM: 1600 ft3/min
  • Coil Type: N
  • Communicating: Non-Communicating
  • Configuration: Multi-Position
  • Energy Star Compliant: No
  • Fan Speeds: 5
  • Height: 57 in
  • Liquid Line (OD): 3/8 in
  • Material: Steel
  • Max CFM: 1800 cfm
  • MBH: 48
  • Phase: Single Phase
  • Refrigerant: R-410A
  • Specifications - CSA Certified: CSA C22.2 NO. 236
  • Specifications - ETL Listed: No
  • Specifications - UL Listed: UL 1995
  • Stages: Single
  • Suction Line (OD): 7/8 in
  • Tonnage: 4 Ton
  • Type: DRAH1TA4821AMTNJA
  • Volts: 208/230V
  • Weight: 139 lb
  • Width: 21 in

DRAH1TA4821AMTNJA 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.

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.

Learn More