Intertherm M4 Gas Furnace

Intertherm M4 Gas Furnace


Product Features

Efficient, Small Footprint
The Intertherm M4 Gas Furnace may be installed in a utility room or in an enclosed closet. The two-piece door design is both not only pleasing to the eyes but it makes it easier for service and repair work.


  • 1-Year Parts
  • 1-Year Labor
  • 1-Year Mileage


100% Fired and Tested:

All units and each component are tested on the manufacturing line. Best packaging in the industry. Unique corner post design assures product will arrive to the homeowner dent free.

30-second Blower Delay:

Delay assures a warm duct temperature at furnace start-up. Adjustable blower off settings (60, 90, 120 and 180 seconds).

30-second Post Purge:

Increases life of heat exchanger.

Hot Surface Igniter:

Innovative application of an appliance type igniter with a 20 year history of reliability. Utilizes proven Smartlite® technology.

Color Coded Wire Harness:

Designed to fit the components, all with quick-connect fittings for ease of service and replacement.

Flexible Category IV Venting System:

May be vertically or horizontally vented using either a one-pipe or two-pipe system for maximum flexibility in installation.

High Static Blowers:

All models equipped with high static blowers.

Low Boy Height:

Easy to apply in low ceiling applications, works well with taller high SEER coils, easy to handle and install.

Tubular Primary Heat Exchanger:

Heavy gauge aluminized steel heat exchanger and stainless steel secondary heat exchanger assures a long life.

90-second Fixed Cooling Cycle Blower-off Delay (TDR):

Increases cooling performance when matched with a NORDYNE coil.

High Efficiency Blower Kits:

Maximize efficiencies. On select units, a SEER improvement of up to 1 point is realized.

Multi-speed Direct Drive Blower:

Designed to give a wide range of cooling capacities. Switches on PCB, provide ultra easy motor speed selection.

LP Convertible:

Simple burner orifice and regulator spring change for ease of convertibility.

Diagnostic Lights for Easy Troubleshooting Without Counting Flashes:

Dedicated light for flame signal strength and two lights in combination to indicate all other fault codes with easy to recognize states without counting flashes.

Incorporates Integrated Control Board:

With connections for electronic air cleaner and humidifier.

Two-Piece Door Design:

Enhances furnace appearance and uses captured screws to prevent losing door screws.

Seated Vestibule:

Reduces burner and inducer sound levels.

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