Duluth Forge 26,000 BTU Ventless Zero Clearance Fireplace Insert

Dual-Fuel Operation, Ventless Installation & Supplemental Heating up to 1,350 Sq. Ft.

Create a custom fireplace centerpiece with the Duluth Forge Ventless Zero Clearance Fireplace Insert. Designed for flexible indoor installation, this modern fireplace insert can be paired with a face mantel or recessed directly into a wall to create a clean, built-in appearance.

Powered by either Natural Gas (NG) or Liquid Propane (LP), this vent-free fireplace produces up to 26,000 BTU/hour and is designed to heat spaces up to approximately 1,350 sq. ft. Its ventless design eliminates the need for an outside duct or chimney, while the dual precision-ported burner provides efficient heat output.

The fireplace combines realistic hand-painted ceramic fiber logs, convenient remote control operation, battery-assisted piezo ignition, and integrated safety technology including an Oxygen Depletion Sensor (ODS) with automatic shut-off.

Key Features

Powerful 26,000 BTU Heat Output

Produces up to 26,000 BTU/hour to provide substantial supplemental heat for spaces up to approximately 1,350 sq. ft.

Dual-Fuel Operation

One fireplace can operate using either Natural Gas or Liquid Propane, providing flexibility for different fuel configurations.

Ventless Fireplace Design

The vent-free design requires no outside duct or chimney, making it suitable for custom fireplace installations where conventional venting is not practical.

Zero Clearance Installation

Designed as a zero-clearance fireplace insert, it can be incorporated into a custom fireplace design, paired with a face mantel, or recessed directly into a wall.

Realistic Ceramic Fiber Logs

Includes five hand-painted ceramic fiber logs designed to provide a realistic traditional fireplace appearance.

Dual Precision-Ported Burner

The dual precision-ported ventless gas burner is engineered to provide an attractive flame presentation while delivering efficient heat.

99.9% Efficiency

The ventless design is rated at 99.9% efficiency, helping maximize the heat generated from the fuel.

Oxygen Depletion Sensor with Automatic Shut-Off

An integrated Oxygen Depletion Sensor (ODS) monitors oxygen levels and includes an automatic shut-off function for added safety.

Remote Control Included

Convenient remote control operation allows you to control the fireplace from a comfortable distance.

Battery-Assisted Piezo Ignition

Battery-assisted piezo ignition provides convenient startup without requiring a traditional electrical connection for ignition.

Modern Black Finish

The black finish and clean design complement modern interiors and custom fireplace surrounds.

Heating & Performance Specifications

Specification	Details
Maximum Heat Output	26,000 BTU/hour
Total BTU	26,000 BTU
Heating Area	Up to 1,350 sq. ft.
Efficiency	99.9%
Fuel Type	Dual Fuel — Natural Gas & Liquid Propane
Vent Type	Ventless
Burner Type	Dual Precision-Ported Ventless Gas Burner
Ignition	Battery-Assisted Piezo
Oxygen Depletion Sensor	Yes
Automatic Shut-Off	Yes

Dimensions

Specification	Details
Front Product Width	29.1 in
Front Product Height	23.9 in
Product Depth	13.9 in
Rear Product Width	29.1 in
Rear Product Height	24 in
Product Weight	48 lb

Product Details

Specification	Details
Brand	Duluth Forge
Product Type	Ventless Zero Clearance Fireplace Insert
Style	Modern
Color Family	Black
Material	Iron
Indoor/Outdoor	Indoor
Fuel Configuration	Dual Fuel
Venting	Ventless
Pack Size	1 Unit
Included Log Set	Yes
Included Remote Control	Yes

Installation & Design

The Duluth Forge fireplace insert provides multiple design possibilities for creating a custom fireplace installation:

• Pair with a compatible face mantel


• Recess directly into a wall


• Build into a custom fireplace surround


• Use as an indoor supplemental heating source


• Create a modern fireplace focal point without an outside chimney or duct

Always follow the manufacturer's installation requirements and applicable local building, gas, and safety codes.

Safety Features

The fireplace includes integrated safety technologies designed to support safe operation:

• Oxygen Depletion Sensor (ODS)


• Automatic shut-off


• Battery-assisted piezo ignition


• Ventless burner system

Certifications & Warranty

Specification	Details
Certification	PFS Certified
Manufacturer Warranty	1-Year Limited Warranty
Return Policy	90-Day Returnable

Recommended Applications

The Duluth Forge Ventless Zero Clearance Fireplace Insert is well suited for:

• Custom residential fireplaces


• Living rooms and family rooms


• Bedroom fireplace installations


• Wall-recessed fireplace designs


• Mantel installations


• Supplemental heating


• Homes without a traditional chimney


• Natural gas or propane heating applications


• Modern interior fireplace renovations

Why Choose the Duluth Forge Fireplace Insert?

The Duluth Forge Ventless Zero Clearance Fireplace Insert combines 26,000 BTU heating performance, dual-fuel flexibility, 99.9% efficiency, realistic ceramic fiber logs, remote operation, and built-in safety protection in a compact modern design. With no outside duct or chimney required, it offers a flexible way to create a custom fireplace while providing supplemental heat for spaces up to approximately 1,350 sq. ft.

• We currently ship within the United States only.
• Enjoy free standard shipping on all orders.
• Orders are processed within 1–2 business days.
• Estimated Total Delivery Time is 4–7 business days.
• Tracking information will be sent to your email within 24 hours after your order has been dispatched.
• For more information about our shipping process, please view our full Shipping Policy.

• Not the right fit? Return or exchange within 30 days.
• Items must be unused and in original condition.
• Damaged products are eligible for a refund or replacement.Your line works well.
• For more information about our return & refund process, please view our full Return & Refund Policy.