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Duluth Forge Dual Fuel Ventless Gas Fireplace With Mantel – 32,000 BTU, T-Stat Control, Slate Gray Finish – Model# DFS-400T-2GR

★★★★★
4.9
(521 reviews)

$489.71

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Delivery in 5–7 business days

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SKU: 32643 Category:

Frequently Asked Questions

This product is currently part of our Spring Flash Sale. We're offering limited-time discounts to clear inventory before new seasonal stock arrives.

Orders are processed within 1–2 business days and typically arrive within 5–7 business days anywhere in the United States.

Yes. We offer completely free shipping across the United States with no hidden fees.

No problem. Every order is backed by our 90-day money-back guarantee. If you're not satisfied, simply contact us and we'll help with a return.

Yes. All payments are processed through secure encrypted checkout systems to keep your information completely safe.

Our Duluth Forge brand fireplace inserts are proudly assembled in the USA using parts manufactured in the USA! These fireplace inserts make a great addition to your living space, are energy efficient and easy to use!

This Product Is Proudly Assembled in the USA Using Parts Manufactured in the USA!

Designed, Engineered, Assembled and Tested in the USA.

Skilled American workers manufacture parts, assemble and test our products.

Only high-quality materials and parts are used in the manufacturing of our products.

Our factory features state of the art manufacturing equipment.

Product ships from our domestic warehouse in Kentucky, USA.

The Duluth Forge Ventless Fireplace features our Furniture Quality fireplace mantel and our Dual Fuel, Vent Free Gas fireplace insert that provides you with heat and beauty. The product is made to produce up to 32,000 BTU of heat, enough to heat 1,500 square feet of living space. The fireplace provides a beautiful and realistic flame pattern with realistic fiber ceramic logs for a stunning home experience. This vent-free fireplace system includes many features like a T-Stat control, Oxygen Depletion Sensor with automatic shut-off, battery assisted piezo ignition, and much more. The fireplace mantel has been carefully designed and created in a slate gray furniture grade finish that accents its quality and excellence.

Product Features:

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

Accessories

Blower Sold Separately – Model QEB100

What’s in the Box?

Vent-Free Fireplace Insert – Qty. 1

Hand Painted Ceramic Fiber Logs – Qty. 6

AAA Batteries – Qty. 1

Hardware Package – Qty. 1

This Product Is Shipped Via Truck Freight and Ships in Two Boxes

Truck Freight Shipments: All truck freight shipments require a customer contact telephone number when the order is placed. The freight carrier will contact you via telephone to make a delivery appointment. The customer is responsible to unload the truck freight shipments. For your convenience, a lift-gate service is included, which lowers the products to the ground.

Please Note:

This Item Is Not for Sale To Residents In California and may be prohibited in your area. Customers are responsible for checking local codes and regulations prior to purchase. Vent-Free heaters do not operate at elevations above 4,500 feet altitude.

California residents

see Prop 65 WARNINGS

Product Manuals

Fireplace Insert:

Owner’s Manual

Fireplace Mantel:

Owner’s Manual

Customer Reviews
★★★★★ 4.9 / 5 from 521 verified customers
Michael R.
Texas, USA
★★★★★
I was honestly a little skeptical ordering something this big online, but everything went smoothly. Delivery was quicker than expected and the quality is solid. Really happy I found Mylata.
March 2026
Jessica L.
Florida, USA
★★★★★
Great experience overall. The ordering process was easy and I received tracking updates the whole time. Everything arrived exactly as described.
February 2026
Robert M.
Arizona, USA
★★★★★
Good prices compared to other stores I checked. Setup was pretty straightforward and everything works perfectly so far.
February 2026
Daniel P.
Nevada, USA
★★★★★
The packaging was excellent and nothing was damaged during shipping which was my biggest concern. Customer support was also quick to reply when I had a question.
January 2026
Amanda K.
California, USA
★★★★★
Bought this for our backyard and the kids absolutely love it. Quality feels really good and it looks even better in person than in the pictures.
January 2026
Thomas G.
Illinois, USA
★★★★★
Used it during our last camping trip and it worked flawlessly the whole weekend. Battery lasted longer than I expected which was a nice surprise.
December 2025
Chris D.
Oregon, USA
★★★★★
Everything from checkout to delivery was smooth. I appreciate when a store actually communicates well and keeps you updated.
December 2025
Emily W.
Colorado, USA
★★★★★
Our backyard looks completely different now. Installation took a few hours but the end result was totally worth it.
November 2025
Andrew S.
Washington, USA
★★★★★
I rarely leave reviews but this one deserved it. Smooth transaction, good quality and no surprises. Would definitely order from Mylata again.
November 2025