Dometic™ DFMDH30111 RV Furnace – 30,000 BTU – LP Gas – Bottom Discharge – 12V DC

DFM Series | Hall Effect Sensor Model | Medium Size

Model: DFMDH30111
Series: DFM “H” Series
Fuel Type: LP Gas (Propane)
BTU Output: 30,000 BTU
Stage: Single Stage
Voltage: 12 Volt DC
Discharge Type: Bottom Discharge
Access Door & Thermostat Sold Separately

Product Overview

The Dometic™ DFMDH30111 is a high-capacity 30,000 BTU LP gas RV furnace designed for medium-sized RV applications requiring bottom-discharge ducting.

As part of the updated DFM “H” Series, this furnace features an advanced Hall Effect airflow verification system, replacing the traditional mechanical sail switch found in older furnaces.

Instead of relying on a paddle-style airflow switch that can stick or collect dust, the Hall Effect system electronically monitors blower motor rotation to confirm proper airflow before ignition. This results in:

• Faster and more consistent ignition
• Fewer airflow-related service issues
• Improved reliability in cold or dusty environments
• Reduced maintenance compared to sail-switch models

Operating on standard 12 Volt DC, the DFMDH30111 is ideal for replacement installations requiring dependable propane heating with modern electronic airflow monitoring.

⚠ Important: Always measure your existing furnace cut-out dimensions before purchasing to confirm proper fit.

Key Features

• 30,000 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)
• Built-In Soft Start technology
• Reduced startup electrical surge
• Medium-size installation footprint
• Designed for modern RV furnace systems
• Access door sold separately
• Thermostat sold separately

Specifications

• Model: DFMDH30111
• Series: DFM H Series
• BTU Rating: 30,000 BTU
• Fuel Type: LP Gas
• Heating Stage: Single Stage
• Voltage: 12 Volt DC
• Discharge Configuration: Bottom
• Width: 16-1/2 inches
• Height: 7 inches
• Depth: 20 inches
• Airflow Monitoring: Hall Effect Sensor
• Soft Start Technology: Yes
• Access Door Included: No
• Thermostat Included: No

Why Choose the H-Series (Hall Effect)?

Traditional RV furnaces use a mechanical sail switch to detect airflow. Over time, sail switches may:

• Become contaminated with dust
• Stick or fail intermittently
• Prevent ignition
• Require cleaning or replacement

The DFMDH30111 eliminates the mechanical sail switch and uses an electronic Hall Effect sensor to monitor blower motor rotation directly.

Benefits include:

✔ Improved long-term reliability
✔ More consistent ignition performance
✔ Reduced maintenance
✔ Better performance in extreme weather conditions

Frequently Asked Questions (FAQ)

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

Q: Does this model use a mechanical sail switch?
A: No. It uses an electronic Hall Effect sensor.

Q: What is Bottom Discharge?
A: Heated air exits vertically downward into floor ducting systems.

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

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

Q: Can this replace older 30K BTU Atwood models?
A: In many cases, yes — but always verify cut-out dimensions, discharge direction, and gas/electrical connection placement before ordering.