Dometic Mojave 40K BTU RV Furnace | DFLD40111 | LP | Door Sold Sep

Heat your RV efficiently and quietly with the Dometic DFLD40111 40,000 BTU Mojave Series RV Furnace. This compact, lightweight LP gas furnace delivers maximum airflow and rapid heating with Dometic's standout tubular-pipe heat exchanger design — engineered for quieter operation, smoother airflow, and the most duct configuration options on the market. The right furnace for larger RVs, fifth wheels, and toy haulers that need substantial heating capacity.

40,000 BTU — Substantial Heating Capacity

The DFLD40111 delivers 40,000 BTU of heating output — appropriate for:

• Larger fifth wheels and toy haulers with serious heating demand
• Class A motorhomes with substantial interior volume
• RVs in cold climates where heating capacity matters
• Setups with multiple slide-outs that add cabin space requiring heat

Tubular Pipe Heat Exchanger — Quieter, Smoother Airflow

Dometic's standout engineering feature is the tubular pipe design heat exchanger with smooth, rounded bends. Compared to conventional sharp-cornered designs:

• Air flows and heats more evenly through the rounded pipe geometry
• Air doesn't get "trapped" or slowed in sharp corners
• Less turbulence means meaningfully quieter operation — a real comfort improvement when you're trying to sleep with the furnace cycling
• Maximum airflow at a given fan speed

Up to 9 Duct Configurations — Most in the Industry

The DFLD40111 offers up to 9 possible duct configurations — the most flexibility on the market for distributing heat throughout your RV. Whether your installation needs ductwork running forward, aft, side-to-side, or some combination, the DFLD40111 likely supports the configuration you need without compromise.

Horizontal OR Vertical Installation

The compact low-profile design installs in either horizontal or vertical orientation — adapting to existing space constraints in different RV layouts. That installation flexibility means the furnace can fit installations where a single-orientation furnace wouldn't.

⚠️ Access Door SOLD SEPARATELY — Required for Installation

The exterior access door is NOT included with this furnace and is required for installation. The matching access door is Dometic part #33058, sold separately.

Important note for replacement scenarios:

• If you're replacing an older AF model (e.g., AFLD40111, AFLD40131) with this newer DF model, you MUST replace the access door — the old AF door is not compatible
• If you're replacing a DF model with this DF model, you can typically reuse your existing access door

Doorless Version Available

This furnace is also available as a doorless version (DFLD40121). If you're going from a doored installation to a doorless one (or vice versa), you may need to modify your existing space — the housing requirements are different.

Wide Direct-Replacement Coverage

The DFLD40111 replaces an extensive range of earlier Atwood/Dometic furnaces. Cross-reference: if your existing furnace has any of these part numbers, this is the likely replacement:

Older item numbers:

• 8940DC, 32659, 32661, 32803, 32806, 35600, 38351
• 32803SU, 32806SU, 35600SU

Older model numbers:

• AFLD40111, AFLD40131, DFLD40131 (BP, SP, or SU variants)

Cross-reference part numbers for this DFLD40111:

• DFLD40111, DFLD40111SP, 9108923369

Note: This furnace may not be a "direct" replacement in all cases. Depending on your specific RV application and existing furnace model, modifications may be required to install this furnace.

Electric Ignition + 12V DC Operation

The DFLD40111 uses electric ignition for reliable starts without manual lighting. The furnace itself runs on 12V DC power from your RV electrical system (12.5 amp draw during operation) and burns LP propane as the heat source.

⚠️ Professional Installation Recommended

Furnace installation involves propane connections, ducting, exhaust venting, and electrical work. Improperly installed gas furnaces are a serious fire, carbon monoxide, and safety risk. Installation should be performed by a qualified RV service technician. Always leak-test propane connections after installation and verify proper exhaust venting.

What's Included

• (1) DFLD40111 Furnace
• (2) Mounting Brackets
• (2 to 4) Duct Adapters (quantity depends on configuration)

Sold Separately — REQUIRED

• Access Door (Dometic #33058) — required for installation

Key Features

• 40,000 BTU heating capacity — substantial output for larger RVs
• Dometic Mojave Series tubular pipe heat exchanger design
• Quieter operation via reduced air turbulence
• Up to 9 duct configurations — most in the industry
• Horizontal OR vertical installation
• Low-profile compact design
• Electric ignition
• LP gas heat source
• 12V DC operation, 12.5 amp draw
• Ducted circulation
• Doored (exterior access) — door sold separately (#33058)
• Direct replacement for many older Atwood/Dometic furnaces
• Cross-references: DFLD40111, DFLD40111SP, 9108923369
• Compact dimensions (w/o door): 16-1/2" W × 9" H × 20" D
• Weight: 39 lbs
• Backed by a limited 2-year manufacturer warranty

Specifications

• Brand: Dometic
• Series: Mojave Model DFLD40111
• Item #: 92948
• Model: 38359
• Manufacturer SKU: 9108923369
• UPC: 713814220938
• Cross-Reference Part Numbers: DFLD40111, DFLD40111SP, 9108923369
• Type: RV Furnace
• BTU Output: 40,000 BTU
• Heat Source: LP gas (propane)
• Ignition: Electric
• Power: 12V DC
• Current Draw: 12.5 amps
• Circulation: Ducted
• Duct Configurations: Up to 9 possible
• Installation Orientation: Horizontal OR vertical
• Furnace Access: Doored (exterior access)
• Access Door: NOT INCLUDED (Dometic #33058, sold separately, required for installation)
• Doorless Alternative Model: DFLD40121
• Furnace Dimensions (w/o door): 16-1/2" W × 9" H × 20" D
• Weight: 39 lbs
• Replaces (older models): 8940DC, 32659, 32661, 32803, 32806, 35600, 38351, 32803SU, 32806SU, 35600SU, AFLD40111, AFLD40131, DFLD40131 (BP/SP/SU)
• Return Policy: 30 days after delivery
• Special Order: No
• Warranty: Limited 2-year manufacturer warranty