Dometic DFMDH35121 35K BTU Bottom-Discharge Furnace

The NEW Dometic DFM Series Furnace (35,000 BTU) is engineered for maximum comfort, reliable performance, and efficient heating in RV applications. Featuring a rear gas manifold and designed as a less door model, it offers a precise fit for permanent installations. With its built-in Soft Start technology and automotive-grade Hall Effect Sensor, this furnace ensures quieter startups, more reliable ignition, and reduced in-rush current.

Important: Thermostat sold separately. Always measure your existing cutout dimensions before purchasing to confirm proper fit.

Key Specifications

• BTU Level: 35,000 BTU

• Fuel Type: LP Gas

• Stage: Single Stage

• Ignition Type: Electronic Ignition

• Discharge Type: Bottom Discharge

• Voltage: 12 Volt DC

• Current Draw: Varies by use

• Dimensions: 16-1/2" W x 7" H x 20" D

• Access Door: Not included (sold separately)

• Installation Type: Permanent, with rear gas manifold

Features & Benefits

• Patent-Pending Hall Effect Sensor – Eliminates moving parts for superior durability

• One-Piece Seamless Tubular Heat Exchanger – Ensures efficient heat transfer and even airflow

• 18–22% More Airflow – Compared to leading competitor furnaces in ducted applications

• Built-In Soft Start – Reduces in-rush current by up to 80% for quieter, smoother startups

• Precision Engineering – Designed for long-term reliability with no moving parts in ignition components

• Flexible Installation – Configurable for both horizontal and vertical mounting

Warranty

• Limited 2-Year Manufacturer Warranty

• Manufacturer Part #: DFMDH35121

• Brand: Dometic

Model-specific fitment and installation

Dometic DFMDH35121 - 35,000 BTU nominal input LP furnace with bottom-discharge configuration on this exact model. Check approved duct/return-air layout, vent, propane supply and 12V controls.

Check the precise Dometic model and serial/product label, mounting dimensions, electrical supply, venting and compatible controls before selecting a replacement. Related suffixes and models are not automatically interchangeable.