Dometic™ 38359 RV Furnace – DFLD40111 – 40,000 BTU – LP Gas – 12V DC

DFL Series | Large Size | Bottom Discharge | Single Stage

Part Number: 38359
Model: DFLD40111
Series: DFL (Large Series)
Fuel Type: LP Gas (Propane)
BTU Output: 40,000 BTU
Heating Stage: Single Stage
Voltage: 12 Volt DC
Discharge Type: Bottom Discharge
Access Door & Thermostat Sold Separately

Product Overview

The Dometic™ 38359 (Model DFLD40111) is a high-capacity 40,000 BTU LP gas RV furnace designed for large motorhomes, fifth wheels, destination trailers, and high-heat-demand applications.

Part of the DFL Series large-chassis platform, this furnace operates on 12 Volt DC power and delivers strong, consistent heating performance through a bottom-discharge airflow configuration.

As a single-stage furnace, the DFLD40111 operates at full BTU output when activated, providing straightforward, reliable heating for larger RV interiors.

⚠ Important: This unit requires the purchase of a compatible exterior access door (sold separately).
⚠ A compatible wall thermostat is also required and sold separately.
⚠ Always measure your existing furnace cut-out before ordering to confirm proper fit.

Key Features

• 40,000 BTU high-output heating capacity
• LP Gas (propane) operation
• Single-stage heating system
• 12 Volt DC electrical operation
• Bottom discharge airflow configuration
• Large-size furnace chassis
• Designed for higher heat demand RV applications
• Exterior access door required (sold separately)
• Wall thermostat required (sold separately)
• OEM Dometic replacement furnace

Specifications

• Part Number: 38359
• Model: DFLD40111
• Series: DFL
• BTU Rating: 40,000 BTU
• Heating Stage: Single Stage
• Fuel Type: LP Gas
• Voltage: 12 Volt DC
• Discharge Configuration: Bottom
• Width: 16-1/2 inches
• Height: 9 inches
• Depth: 20 inches
• Exterior Access Door Included: No
• Thermostat Included: No

Installation Notes

• Designed for bottom-discharge duct systems
• Requires matching exterior access door
• Requires compatible wall thermostat
• Verify propane supply and 12V DC electrical connections
• Measure existing cut-out dimensions before ordering

Proper sizing and door selection ensure:
✔ Secure fitment
✔ Proper combustion airflow
✔ Weather-tight installation
✔ Safe furnace operation

Ideal Applications

The DFLD40111 is commonly installed in:

• Large Class A and Class C motorhomes
• Fifth wheels
• Destination trailers
• Toy haulers
• Park model RVs

Its 40,000 BTU output makes it ideal for larger living spaces and colder climate operation.

Frequently Asked Questions (FAQ)

Q: Is this a two-stage furnace?
A: No. The DFLD40111 is a single-stage furnace operating at full 40,000 BTU output when heating is required.

Q: Does this unit include an access door?
A: No. A compatible exterior access door must be purchased separately.

Q: Is this furnace propane only?
A: Yes, this model is LP gas (propane) only.

Q: What voltage does it operate on?
A: 12 Volt DC.

Q: What does bottom discharge mean?
A: Heated air flows downward into the RV’s floor ducting system.