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Dometic DFSD 20121 Small Furnace
Door-less Furnace 18,000 BTU, Uses LP Gas, DC Voltage

Engineered for easy maintenance and superior air delivery. Its compact size offers installation convenience. The Dometic DFSD 20121 Small Furnace now comes with a durable stamped steel door that is built to last (select models only).
  • Low-profile
  • Quiet
  • Flexible installation : 9108923341 (38922) Visit support page + FAQ
Dometic DFSD 20121 Small Furnace
...and more
    • Horizontal or vertical configuration for flexible installation
    • Quiet operation thanks to reduced air turbulence
    • Low-profile, compact design: 7 in. x 12 in. x 20 in. (H x W x D)
    • 12 V DC powered unit
    • 18,000 BTU

Stay warm without being disturbed

The Dometic DFSD 20121 18,000 BTU Small Furnace is a compact, lightweight heater boasting a quiet operation thanks to reduced air turbulence. For easy and flexible installation, it may be placed vertically or horizontally. With the most duct configurations on the market, you can distribute heat exactly as you need it. Access door and thermostat sold separately. Please ensure the existing cutout will accommodate this model: 7 in. H x 12 in. W x 20 in. D.


SKU number 9108923341 
Model DFS 
Model on label DFSD20121 
Scope of delivery Furance, Duct Adaptors and Manual 
Product Description Door-less Furnace 18,000 BTU, Uses LP Gas, DC Voltage 
Dimensions product depth 508 mm
Dimensions product height 177.8 mm
Dimensions product width 304.8 mm
Net weight 9.43 kg
Input voltage (DC) 12 V
Rated input current (DC) 4.8 A
Fuel type Liquid gas LPG 
Fuel consumption peak 192.576 l/h
Certificates ETL 
EAN-13 0713814220808 
Dimensions parcel depth 660.4 mm
Dimensions parcel height 281.94 mm
Dimensions parcel width 400.05 mm
Parcel weight 10.84 kg