Duluth Forge Dual Fuel Ventless Gas Fireplace Insert
- 32,000 BTU, heats up to 1,500 square feet
- Dual fuel: natural gas or liquid propane
- Vent free, zero clearance, no chimney needed
- 29.5 x 29.1 x 15.6 inches (H x W x D), 70 pounds
- 6 hand painted ceramic fiber logs
- Remote control for on/off and thermostat
- Oxygen depletion sensor with automatic shut-off
Updated 2 days ago · Based on the Amazon listing and published specifications, not hands-on testing.
A full size ventless insert that burns either gas type and suits a custom fireplace build. A blower is sold separately, and the remote needs batteries.
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ASIN: B01MCVZEPPModel: FDF400RT-ZCCategory: Gas Fireplaces
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Overview
Duluth Forge builds this vent free gas insert with a dual burner, six painted ceramic logs and a brick-style liner. It is zero clearance approved, so it can be framed into a wall or placed behind a face mantel.
The insert adds a gas fireplace without a chimney or duct. A single unit works on either fuel, and the remote covers the daily controls. A blower is an extra purchase.
Who it's for
Homeowners building or remodeling a fireplace wall who already have a gas supply on hand. Those without a gas line, or who require a vented fireplace, should look at other options.
Pros and cons
- Runs on natural gas or propane
- Zero clearance framing
- Remote control included
- Safety shut-off sensor
- Blower sold separately
- Remote needs batteries
- Gas supply required
Performance notes
The dual burner produces the flame across the logs, and the ceramic heating element radiates warmth into the room. Battery-assisted piezo ignition lights the burner, and the oxygen depletion sensor shuts the gas off automatically. The remote handles on and off and temperature.
Specifications
| Brand | Duluth Forge |
|---|---|
| Model | FDF400RT-ZC |
| Dimensions & fit | |
| Item Dimensions D x W x H | 29.5 H x 29.1 W x 15.6 D inches |
| Item weight | 70 pounds |
| Capacity & performance | |
| Heat Output | 32,000 BTU |
| Heating Coverage | 1,500 square feet |
| Heating Element | Ceramic |
| Power & efficiency | |
| Power Source | Natural gas or liquid propane |
| Compatibility & installation | |
| Installation Type | Zero clearance insert |
| Warranty & support | |
| Warranty Type | Limited |
| Other details | |
| Ventilation Type | Vent free |
| Number of Batteries | 3 AAA required |
| Additional Features | Safety shut off, oxygen depletion sensor, 6 ceramic fiber logs, remote control |
Closest rivals on specs
Majestic MDV3732 Direct Vent Gas Fireplace- Item Weight 70 vs 93.5 pounds (-25%)
Empire Comfort Systems Premium MV 42" Louver B-Vent Fireplace- Item Weight 70 vs 106 pounds (-34%)
- Chamber Depth 15.6 vs 18.4 inches (-15%)
Empire Boulevard SL Vent-Free Linear Fireplace- Item Weight 70 vs 50 pounds (+40%)
- Chamber Depth 15.6 vs 5.5 inches (+184%)
Frequently asked questions
How do I maintain the Duluth Forge FDF400RT-ZC fireplace insert?
The listing gives no cleaning or service schedule. Check the owner's manual for maintenance, and note it has an oxygen depletion sensor with automatic shut-off.
Is a blower included with the Duluth Forge insert?
No. A blower, model QEB100, is sold separately.
Does the Duluth Forge insert burn natural gas or propane?
Either. One unit operates on natural gas or liquid propane. The listing does not describe the conversion steps.