Dometic Large 40,000 BTU Door-Less Furnace

Item #
A compact but powerful 40,000 BTU Dometic furnace that is engineered for easy maintenance and superior air delivery. The compact size offers installation convenience with a horizontal or vertical mount.
More Information
Item # 99735
Brand Dometic
Series Mojave Series DFLD40121
Model 38355
Manufacturer SKU 9108923366
Heat Source LP Gas
Circulation Type Ducted
Furnace Access Door-less (Interior Access)
Ignition Electric
BTU's 40,000
Draw 12.5 Amps
Features 12V DC Powered Unit
Up to 9 Possible Duct Configurations
Horizontal or Vertical Configuration for flexible installation
Low Profile Compact Design
Included (1) Furnace
(2) Mounting Brackets
(2 to 4) Duct Adapter (depending on furnace model)
Dimensions Furnace (w/o Door): 16-1/2" W x 7" H x 20" D
*Please see the Installation Instructions for more detailed Installation Requirements*
Warranty Limited 2 Year Manufacturer Warranty
Net Weight 39 lbs
Special Order Item No
Return Policy 30 Days (After Delivery)
UPC 713814220945
LTL Freight No
WARNING: This product can expose you to chemicals, which is known to the State of California to cause cancer and reproductive harm. For more information, go to
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The Dometic DFLD 40121 40,000 BTU Large Furnace is a compact, lightweight heater boasting a quiet operation thanks to reduced air turbulence. For easy and flexible installation, it may be placed vertically or horizontally. With the most duct configurations on the market, you can distribute heat exactly as you need it.

Dometic has gone above and beyond to provide RVer's with a furnace that rapidly heats and has maximum air flow. Dometic standouts from the crowd with their tubular pipe design heat exchanger. With smooth and rounded bends, the air flows and heats much more evenly through the pipe without getting "trapped" or slowed down in sharp corners. Not to mention, with less air turbulence, the quieter the furnace!

The Dometic SKU for this furnace is # 9108923366.

This model DFLD40121 replaces* the following older Atwood/Dometic furnaces:

Item #'s: 32657, 32660, 32801, 32804, 32801SU, 32804SU
Model #'s: AFLD35121, AFLD40121 (BP, SP or SU models)

NOTE: When replacing an older AF model with this newer DF model, you MUST replace the access door. If going from a DF model to this DF model you do not need to replace the access door.

If a door-less application is not required or desired, you may use the Dometic Large 40,000 BTU Furnace (Model # DFLD40111) which does require a door for installation. Please note you may have to modify your existing space when going from a door-less application to a doored application.

*This furnace may not be a "direct" replacement. Depending on your application and what your current model furnace is, there COULD be modifications needed to replace your existing furnace with a new furnace.
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