Duluth Forge Dual Fuel Ventless Gas Fireplace with Mantel
- 32,000 BTU maximum output, heats up to 1,500 sq ft
- Vent free, no chimney or outside duct needed
- Dual fuel, natural gas or liquid propane
- 44 x 44 x 15.75 inches with mantel, 100 pounds
- Remote control with battery-assisted piezo ignition, 4 AA batteries
- Oxygen depletion sensor with automatic shut-off
- 6 ceramic fiber logs, hand painted
- Some assembly required, hardware pack in the box
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A ventless dual fuel fireplace with a wood mantel for adding supplemental warmth to a room that has no chimney. It is sold as supplemental heat, and the listing says nothing about gas line hookup.
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ASIN: B075ZK8151Model: DFS-400R-4NGCategory: Gas Fireplaces
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Overview
A living room with no chimney or outside duct can take this Duluth Forge dual fuel fireplace, a ventless gas insert wrapped in a wood mantel with a nutmeg furniture grade finish. A ported burner and a set of ceramic fiber logs give the look of a real fire.
Heat without a chimney is the reason to look at it: the burner runs on natural gas or liquid propane, and an oxygen depletion sensor shuts the unit off automatically. The listing frames it as supplemental heat, not a whole-house system, and both the remote and the ignition depend on batteries.
Who it's for
A living room with no flue, where the owner wants a mantel-style centerpiece with remote operation and some added warmth. The listing speaks to homes that already have natural gas or liquid propane available. Anyone who needs a vented fireplace, or heat for several large spaces, should look at a different type.
Pros and cons
- Ventless, no chimney or duct needed
- Runs on natural gas or propane
- Oxygen depletion sensor shuts gas off
- Remote control included
- Some assembly required
- Batteries needed for remote and ignition
- Supplemental heat only, not a main heater
- Gas hookup details not listed
Performance notes
Heat comes from a dual ported ventless burner, and because there is no flue the warmth stays in the room it is installed in. Output is set by the burner rating, and the listing gives a coverage area for heating. A battery-assisted piezo igniter lights the burner, and the oxygen depletion sensor cuts the gas when room air runs low.
Specifications
| Brand | Duluth Forge |
|---|---|
| Model | DFS-400R-4NG |
| Dimensions & fit | |
| Item Dimensions D x W x H | 15.75"D x 44"W x 44"H |
| Item weight | 100 pounds |
| Capacity & performance | |
| Heat Output | 32,000 BTU |
| Heating Coverage | 1,500 sq ft |
| Heating Element | Ceramic |
| Power & efficiency | |
| Power Source | Battery powered |
| Construction & materials | |
| Material Type | Ceramic fiber logs |
| Color | Nutmeg |
| Finish Types | Painted |
| Compatibility & installation | |
| Installation Type | Built in |
| Included components | |
| Included Components | Burner, remote control, mantel, log set, hardware pack |
| Warranty & support | |
| Warranty Type | Limited |
| Other details | |
| Ventilation Type | Vent free |
| Room Type | Living room |
| Number of Batteries | 4 AA batteries required |
Closest rivals on specs
Empire Comfort Systems Premium MV 42" Louver B-Vent Fireplace- Chamber Depth 15 vs 18.4 inches (-18%)
Empire Boulevard SL Vent-Free Linear Fireplace- Item Weight 100 vs 50 pounds (+100%)
- Chamber Depth 15 vs 5.5 inches (+173%)
Frequently asked questions
Is the Duluth Forge DFS-400R-4NG a vented fireplace?
No. The listing describes it as a ventless gas fireplace that needs no outside duct or chimney, and it presents the unit as supplemental heat.
What is in the box with the Duluth Forge DFS-400R-4NG?
The description lists a wood fireplace mantel, a ventless fireplace insert, a ceramic fiber log set and a hardware pack, one of each. The listing also says some assembly is required.
Does the Duluth Forge DFS-400R-4NG run on natural gas or propane?
Either one. The dual fuel technology is described as operating off natural gas or liquid propane.
What batteries does the Duluth Forge fireplace use?
The specs list 4 AA batteries as required. The description mentions battery-assisted piezo ignition and a remote control.