Dometic™ DFMDH25111 RV Furnace – 25,000 BTU – LP Gas – Bottom Discharge – 12V DC

DFM Series | Hall Effect Sensor Model | Medium Size

Model: DFMDH25111
Series: DFM “H” Series
Fuel Type: LP Gas (Propane)
BTU Output: 25,000 BTU
Stage: Single Stage
Voltage: 12 Volt DC
Discharge Type: Bottom Discharge
Access Door & Thermostat Sold Separately

2-Year Limited Manufacturer Warranty

Product Overview

The Dometic™ DFMDH25111 is a high-efficiency 25,000 BTU LP gas RV furnace designed for medium-sized applications requiring bottom-discharge airflow.

This model is part of the advanced DFM “H” Series, which features a Hall Effect sensor system — replacing the traditional mechanical sail switch used in older furnaces.

Instead of relying on a paddle-style airflow switch, the Hall Effect system electronically monitors blower motor rotation to verify airflow before ignition. This provides:

• Faster ignition sequencing
• Improved reliability
• Fewer airflow-related service issues
• Better performance in dusty or cold-weather environments

Operating on 12 Volt DC, this furnace is ideal for modern RV installations and replacement applications requiring dependable propane heating.

⚠ Important: Existing cut-out dimensions must be measured before replacement to ensure proper fit.

Key Features

• 25,000 BTU heating capacity
• LP gas (propane) operation
• Single-stage heating performance
• Bottom discharge airflow configuration
• 12 Volt DC operation
• Hall Effect airflow verification system (no mechanical sail switch)
• Improved ignition reliability vs traditional sail switch systems
• Medium-size installation footprint
• Designed for modern RV heating systems
• Access door sold separately
• Thermostat sold separately

Specifications

• Model: DFMDH25111
• Series: DFM H Series
• BTU Rating: 25,000 BTU
• Fuel Type: LP Gas
• Heating Stage: Single Stage
• Voltage: 12 Volt DC
• Airflow Discharge: Bottom
• Width: 16-1/2 inches
• Height: 7 inches
• Depth: 20 inches
• Airflow Verification: Hall Effect Sensor
• Soft Start Technology: Yes
• Access Door Included: No
• Thermostat Included: No

Why the Hall Effect System Matters

Older furnaces use a mechanical sail switch that can:

• Stick
• Get dirty
• Cause intermittent ignition
• Require seasonal cleaning

The DFMDH25111 eliminates that design and uses an electronic Hall Effect sensor to monitor motor rotation directly. This reduces failure points and improves long-term reliability.

This is especially valuable for:

• Off-grid RV use
• Cold-weather camping
• High-dust travel environments

Frequently Asked Questions (FAQ)

Q: What does the “H” in DFMDH mean?
A: It indicates the furnace uses a Hall Effect sensor system instead of a traditional sail switch.

Q: Does this furnace use a sail switch?
A: No. This model uses electronic airflow verification via a Hall Effect sensor.

Q: What does Bottom Discharge mean?
A: Heated air exits vertically downward into floor duct systems.

Q: Is this a propane furnace?
A: Yes. It operates on LP gas (propane).

Q: Is a thermostat included?
A: No. A compatible 12V furnace thermostat must be purchased separately.

Q: Does it include the access door?
A: No. The exterior access door is sold separately.