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The Duluth Forge DFS-400T-2GR combines a furniture-quality mantel in a slate gray finish with a high-performance dual fuel vent-free fireplace insert. Generating up to 32,000 BTU, it efficiently heats living areas up to 139.4 sq m without requiring an outside duct or chimney.
Featuring six hand-painted ceramic fiber logs and a precision ported burner, this unit produces a realistic flame display while operating at 99.9% efficiency. Integrated thermostat control cycles the burner automatically to maintain room temperature, supported by reliable battery-assisted piezo ignition and an oxygen depletion safety sensor.
Key Features
Maximum BTU
32,000 BTU
Fuel Type
Natural Gas or Liquid Propane
Heating Area
139.4 sq m
Efficiency
99.9%
Ignition Type
Battery assisted Piezo ignition
Control Type
Thermostat Control
Safety Feature
O.D.S. (Oxygen Depletion Sensor) with automatic shut-off
Mantel Finish
Slate Gray Furniture Grade
Number of Logs
6 hand painted Ceramic Fiber Logs
Dimensions (W x H x D)
114.3 x 114.3 x 38.1 cm
Product Weight
72.6 kg
Gas Fireplace Model Number
FDF400T-ZC
Fireplace Mantel Model Number
CM400-2-GR
Assembly
Some assembly required
Country of Origin
USA
Highlights
32,000 Maximum BTU using Natural Gas or Liquid Propane
Heats up to 1,500 sq. ft.
Patented Dual Fuel Technology
1 Unit operates off Natural Gas or Liquid Propane
Thermostat Control – The control automatically cycles the burner on and off to maintain a desired room temperature
Slate Gray Furniture Grade Mantel Finish
Dual moldings adorn the pilasters to complement the overall elegant design
Mantel features light distressing throughout
6 realistic hand painted Ceramic Fiber Logs
Vent-free gas fireplace insert
Dual Precision Ported Vent Free gas burner
Economical: 99.9% efficient. No outside duct or chimney needed!
Safety Assurance: O.D.S. (Oxygen Depletion Sensor) included with automatic shut-off
Battery assisted Piezo ignition
Product Dimensions: 45′ W X 45′ H X 15′ D
Product Weight: 160 lbs.
Gas Fireplace Model Number: FDF400T-ZC
Fireplace Mantel Model Number: CM400-2-GR
Fireplace Insert is Assembled in the USA
Some assembly required
1 Year Limited Warranty
Compatibility
Blower Sold Separately – Model QEB100
Warranty
1 Year Limited Warranty
What's included
Vent-Free Fireplace Insert – Qty. 1
Hand Painted Ceramic Fiber Logs – Qty. 6
AAA Batteries – Qty. 1
Hardware Package – Qty. 1
Frequently asked questions
What type of fuel can be used with this fireplace?
The fireplace utilizes patented Dual Fuel Technology and operates on either Natural Gas or Liquid Propane.
What heating area does this unit cover?
This 32,000 BTU fireplace is capable of heating living spaces up to 139.4 sq m (1,500 sq. ft.).
Is a chimney or external venting required for installation?
No outside duct or chimney is required, as this fireplace operates as a 99.9% efficient vent-free system.
What safety mechanisms are built into the system?
It is equipped with an Oxygen Depletion Sensor (O.D.S.) featuring automatic shut-off.
Shipping+
We offer free shipping on eligible orders. Orders are typically processed within 1 business day and transit normally takes 3–5 business days.
Returns & Refunds+
Eligible unused products may be returned within 30 days of delivery. Products must meet the conditions stated in our Refund Policy.
Warranty+
Warranty coverage against manufacturing defects for eligible Luneashop products.
