Two Stage Variable Speed Furnaces - 80% AFUE

Stay comfortable during the cold season with energy-efficient heating.

Durastar’s Advanced Series furnaces offer additional technologies that elevate system efficiency and total comfort. With two levels of heat output, our two-stage furnaces adapt to environmental conditions. On the coldest days, your furnace kicks into HIGH gear, using 100% power to maintain a comfortable and consistent temperature throughout your home. Conversely, on milder days, the variable speed blower motor limits power consumption, using only what is necessary to achieve the specified temperature. As a result, the unit is often operating in a lower, energy-saving mode using only 60-65% of its power output. Furthermore, variable speed motors quiet airflow and control humidity, providing a truly relaxing home environment.

Benefit from energy savings, quieter operation, and humidity control with Durastar’s two-stage gas furnaces. These 80% AFUE units are convertible for both up-flow and horizontal placements and provide reliable, evenly distributed heat for homes of all sizes.




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

Two Stage Variable Speed Furnaces - 80% AFUE 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.
  • Bluetooth Connectivity for ease of monitoring, troubleshooting, and repairing the product
  • Direct spark ignition system is one of the most dependable ignition systems on the market
  • Two-Stage Heating: Furnace operation mainly stays at low capacity around 60-65%, but will switch to high capacity to deliver stable heat distribution
  • Constant CFM Motor: Truly variable speed technology allows for ultimate humidity control, quieter sound levels and year-round energy savings
  • Aluminized steel constructed heat exchanger provides maximum corrosion resistance and thermal fatigue reliability. It is also removable for improved serviceability


  • AFUE: 80.00 %
  • BTU: 50000
  • BTU Heat Rating: 40000 Btu/h
  • Blower Type: Direct Drive
  • Communicating: Non-Communicating
  • Condensing: No
  • Configuration: Upflow,Horizontal
  • Energy Star Compliant: No
  • Fan Speeds: Variable
  • Flue Size: 4
  • Fuel Type: Natural Gas
  • Height: 34 in
  • Horsepower: 1/2 hp
  • Ignition System: Direct Spark Ignition
  • Length: 28 in
  • MBH: 50
  • Phase: Single Phase
  • Power Source: Gas
  • Specifications - UL Listed: Yes
  • Stages: Two
  • Style Name: DR80UHAW*2
  • Tonnage: 3 Ton
  • Volts: 115V
  • Weight: 110 lb
  • Width: 14 in

DR80UHAW0502314SAB 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 AFUE?

Annual Fuel Utilization Efficiency (AFUE), is a standardized measure of efficiency for how furnaces and boilers convert energy to useable heat.

What is the main difference between a furnace and a heat pump?

Furnaces burn fuel to generate heat whereas a heat pump draws air from outdoors across the condenser coil, either releasing heat to the outdoor air when in cooling mode or absorbing heat from the outdoors, even in the coldest weather in heating mode.

How often should my furnace be serviced?

Durastar recommends your furnace to be serviced at least once a year to ensure it is functioning optimally and providing maximum comfort.

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