Single-Stage Furnaces - 95% AFUE

Single-stage output, multiple blower speeds: Achieve better temperature control and energy savings.

Relax in a comfortable space and have peace of mind that Durastar’s single-stage furnaces – 95% AFUE – blanket you with warmth and protect your wallet. Get better control with two aluminized steel heat exchangers that work together to automatically adjust blower speeds and extract the most out of your fuel bill. If outdoor conditions are frigid then the blower kicks into HIGH gear to keep your indoor spaces comfortable. Alternatively, when the weather is mild, the furnace blower drops to LOW power, therefore using less energy to maintain the desired temperature.

These single-stage furnaces – 95% AFUE are multi-positional and adapt to fit your home’s existing ductwork. Equipped with a multi-speed, constant torque ECM motor you obtain steady, reliable airflow year after year. To thoroughly review your heating options, be sure to visit our complete collection of Core Series and Advanced Series furnaces. Depend on Durastar for highly tested heating and cooling systems.




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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Single-Stage Furnaces - 95% 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.
  • Constant torque ECM motor maintains efficiency across a range of operating speeds for increased energy savings
  • Direct spark ignition system is one of the most dependable ignition systems on the market
  • Blocked drain sensor will prevent water spillage and potential water damage to your home.
  • Low profile 34" cabinet is ideal for space constrained installations
  • Aluminized steel constructed heat exchanger provides maximum corrosion resistance and thermal fatigue reliability. It is also removable for improved serviceability


  • AFUE: 95.00 %
  • BTU: 40000
  • BTU Heat Rating: 39900 Btu/h
  • Blower Type: Direct Drive
  • Communicating: Non-Communicating
  • Condensing: Yes
  • Configuration: Multi
  • Energy Star Compliant: Yes
  • Fan Speeds: 5
  • Flue Size: 4
  • Fuel Type: Natural Gas
  • Green Product: Yes,Energy Star
  • Height: 34 in
  • Horsepower: 1/2 hp
  • Ignition System: Direct Spark Ignition
  • Length: 28 in
  • MBH: 40
  • Phase: Single Phase
  • Power Source: Gas
  • Specifications - UL Listed: Yes
  • Stages: Single
  • Style Name: DR95M4AW
  • Tonnage: 3 Ton
  • Volts: 115V
  • Weight: 123.5 lb
  • Width: 17-1/2 in

DR95M4AT0401317SAN 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.

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