Maximize comfort and dependability in cool weather with the Dometic DFLD40111 Large 40K BTU Essential Furnace w/ Door (9108923369) from Nomadic Supply Company®. Now enhanced with an automotive-grade Hall Effect Sensor and built-in Soft Start, the Dometic DFLD40111 Large 40K BTU Essential Furnace w/ Door (9108923369) delivers more reliable ignition and quieter startups.
With 18–22% more airflow than the leading competitor, our Dometic DFLD40111 Large 40K BTU Essential Furnace w/ Door (9108923369) distributes heat more evenly throughout the RV—thanks to its advanced air baffle system and one-piece tubular heat exchanger designed for long-lasting, efficient performance. Access Door and Thermostat sold separately.
TUBULAR DESIGN FOR LASTING PERFORMANCE
Every Dometic furnace features our exclusive one-piece tubular heat exchanger. Unlike clamshell designs that can crack or trap gasses, our seamless construction provides smoother airflow and more reliable thermal performance. The radius tubing evenly distributes heat inside the exchanger—resulting in quieter, more stable operation and longer-lasting durability.
EVEN HEAT—IN EVERY SIZE RV
Dometic furnaces are engineered to deliver consistent, even warmth—no matter the floorplan. With up to 22% more airflow than the competition in ducted applications, our advanced air baffle design helps eliminate cold spots and ensures each vent delivers the comfort your customers expect. Whether it’s a compact camper or a luxury coach, every Dometic furnace is built to perform.
CONFIGURED FOR FLEXIBILITY
Whether you’re installing in a compact trailer or a full-size motorhome, Dometic furnaces are designed to adapt. With both horizontal and vertical mounting options, plus available door and doorless models, our lineup fits seamlessly into a variety of RV layouts. We also offer a range of accessories to simplify installation and support system integration.
AMERICAN ASSEMBLY, FASTER SUPPORT
Our Dometic Essential Furnace lineup is proudly assembled in the USA—ensuring a dependable domestic supply chain. That means faster lead times, reliable part availability, and fewer delays in production or service. It’s one more way Dometic delivers quality products backed by responsive support.
Precision Engineering
Patent-pending Hall Effect Sensor for cleaner, debris-resistant ignition.
Smoother Startups
On-Board Soft Start reduces in rush current by 80% and jarring start-up noise.
More Airflow
18–22% more airflow ensures even heat throughout.
Durable Heat Exchanger
One-piece tubular design delivers efficient heat transfer and airflow distribution.
Flexible Fit
Horizontal or vertical install with door or doorless options.
Dometic DFLD40111 Large 40K BTU Essential Furnace w/ Door (9108923369) Specifications:
- SKU number: 9108923369
- Model: DFM
- Model on label: DFLD40111
- Scope of delivery: Single Pack of one boxed
- Product Description: Essential Doored Furnace, 25,000 BTU, Uses LP Gas, 12 DC Voltage
- Net weight: 35.5 lbs
- Product dimensions: 20″ x 9″ x 16.5″
- Voltage Type: DC
- Input voltage (DC): 12 V
- Rated input current (DC): 11.1 A
- Fuel type: Liquid gas LPG
- Heating Capacity: 40,000 Btu/h
- Certificates: CSA
- Door Style: Door
- Furnace Size: Large
Dometic Essential Furnace Transition Chart:
Old Legacy Model
Old Item Number
New Model Number
New Item Number
Door
Doorless
BTU
Case Size
Dimensions
Weight
Amp draw
Warranty
DFSAD12111
9108923336
DFSADH12111
9610008173
Yes
No
12K
Small
H: 7″ x W: 12″ x D: 20″
21 lbs
2.4
2 Year
DFSAD12121
9108923340
DFSADH12121
9610008174-
No
Yes
12K
Small
H: 7″ x W: 12″ x D: 20″
21 lbs
2.4
2 Year
DFSD20111
9600001165
DFSDH20111
9610008177
Yes
No
18K
Small
H: 7″ x W: 12″ x D: 20″
21 lbs
4.8
2 Year
DFSD20121
9108923341
DFSDH20121
9610008179-
No
Yes
18K
Small
H: 7″ x W: 12″ x D: 20″
21 lbs
4.8
2 Year
DFMD25111
9600000886
DFMDH25111
9610008158
Yes
No
25K
Medium
H: 7″ x W: 16.5″ x D: 20″
26 lbs
7.5
2 Year
DFMD25121
9600000890
DFMDH25121
9610008160-
No
Yes
25K
Medium
H: 7″ x W: 16.5″ x D: 20″
26 lbs
7.5
2 Year
DFMD30111
9600000923
DFMDH30111
9610008166
Yes
No
30K
Medium
H: 7″ x W: 16.5″ x D: 20″
26 lbs
7.5
2 Year
DFMD30121
9610008168
DFMDH30121
9610008168-
No
Yes
30K
Medium
H: 7″ x W: 16.5″ x D: 20″
26 lbs.
7.5
2 Year
DFMD35111
9108923309
DFMDH35111
9610007792
Yes
No
35K
Medium
H: 7″ x W: 16.5″ x D: 20″
26 lbs
11.1
2 Year
DFMD35121
9600001058
DFMDH35121
9610007794-
No
Yes
35K
Medium
H: 7″ x W: 16.5″ x D: 20″
26 lbs
11.1
2 Year
DFLD40111
9108923369
DFLDH40111
9610008182
Yes
No
40K
Large
H: 9″ x W: 16.5″ x D: 20″
39 lbs
12.5
2 Year
DFLD40121
9108923362
DFLDH40121
9610008184-
No
Yes
40K
Large
H: 9″ x W: 16.5″ x D: 20″
39 lbs
12.5
2 Year
Dometic DFLD40111 Large 40K BTU Essential Furnace w/ Door Documents:
Dometic Essential Furnace Installation Manual
Dometic Essential Furnace Short Installation and Operating Manual
Dometic DFLD40111 Large 40K BTU Essential Furnace w/ Door (9108923369) Documents:
Dometic Essential Furnace Installation Manual
Dometic Essential Furnace Short Installation and Operating Manual
Dometic Essential Furnace Installation Manual
Dometic Essential Furnace Operating Manual
Dometic Essential Furnace Short Installation and Operating Manual
Nomadic Supply Company Dometic Catalog
Dometic Essential Furnace Transition Chart:
| Old Legacy Model | Old Item Number | New Model Number | New Item Number | Door | Doorless | BTU | Case Size | Dimensions | Weight | Amp draw | Warranty |
| DFSAD12111 | 9108923336 | DFSADH12111 | 9610008173 | Yes | No | 12K | Small | H: 7″ x W: 12″ x D: 20″ | 21 lbs | 2.4 | 2 Year |
| DFSAD12121 | 9108923340 | DFSADH12121 | 9610008174- | No | Yes | 12K | Small | H: 7″ x W: 12″ x D: 20″ | 21 lbs | 2.4 | 2 Year |
| DFSD20111 | 9600001165 | DFSDH20111 | 9610008177 | Yes | No | 18K | Small | H: 7″ x W: 12″ x D: 20″ | 21 lbs | 4.8 | 2 Year |
| DFSD20121 | 9108923341 | DFSDH20121 | 9610008179- | No | Yes | 18K | Small | H: 7″ x W: 12″ x D: 20″ | 21 lbs | 4.8 | 2 Year |
| DFMD25111 | 9600000886 | DFMDH25111 | 9610008158 | Yes | No | 25K | Medium | H: 7″ x W: 16.5″ x D: 20″ | 26 lbs | 7.5 | 2 Year |
| DFMD25121 | 9600000890 | DFMDH25121 | 9610008160- | No | Yes | 25K | Medium | H: 7″ x W: 16.5″ x D: 20″ | 26 lbs | 7.5 | 2 Year |
| DFMD30111 | 9600000923 | DFMDH30111 | 9610008166 | Yes | No | 30K | Medium | H: 7″ x W: 16.5″ x D: 20″ | 26 lbs | 7.5 | 2 Year |
| DFMD30121 | 9610008168 | DFMDH30121 | 9610008168- | No | Yes | 30K | Medium | H: 7″ x W: 16.5″ x D: 20″ | 26 lbs. | 7.5 | 2 Year |
| DFMD35111 | 9108923309 | DFMDH35111 | 9610007792 | Yes | No | 35K | Medium | H: 7″ x W: 16.5″ x D: 20″ | 26 lbs | 11.1 | 2 Year |
| DFMD35121 | 9600001058 | DFMDH35121 | 9610007794- | No | Yes | 35K | Medium | H: 7″ x W: 16.5″ x D: 20″ | 26 lbs | 11.1 | 2 Year |
| DFLD40111 | 9108923369 | DFLDH40111 | 9610008182 | Yes | No | 40K | Large | H: 9″ x W: 16.5″ x D: 20″ | 39 lbs | 12.5 | 2 Year |
| DFLD40121 | 9108923362 | DFLDH40121 | 9610008184- | No | Yes | 40K | Large | H: 9″ x W: 16.5″ x D: 20″ | 39 lbs | 12.5 | 2 Year |
