If you’re searching for a double-sided fireplace insert that can run on either natural gas or propane, you’re aiming for versatile heat with a clean look. This guide highlights five top options, focusing on dual-fuel gas inserts and the best alternatives for comparison. Each entry explains who it’s best for, why it was selected, and practical considerations to help you choose.
Summary table of chosen products:
| Product | Fuel Type | BTU/Size | Best For |
|---|---|---|---|
| Duluth Forge Dual Fuel Ventless Gas Fireplace Insert (FDI32R) | Natural Gas or Propane | 32,000 BTU | Medium to large rooms, ventless, remote control |
| Duluth Forge Ventless Dual Fuel Gas Log Set (DLS-30R-1) | Natural Gas or Propane | 33,000 BTU | Existing fireplace upgrades, realistic logs |
| LegendFlame Damon Electric Fireplace Insert | Electric | 750/1500W | Electric-only setups, glass door aesthetic |
| 72″ Recessed Electric Fireplace Insert | Electric | 750/1500W | Ultra-wide display, remote and touch control |
| 50 inch Electric Fireplace Inserts with Remote | Electric | Up to 1500W | Wall-mount or inset retrofit, multiple flame settings |
Note: For true dual-fuel functionality, our focus is on gas inserts that support either natural gas or propane. The electric options provide aesthetic and supplemental heat considerations for spaces where gas is not feasible.
Duluth Forge Dual Fuel Ventless Gas Fireplace Insert

Commonly installed as a centerpiece in living areas, this 32,000 BTU ventless insert offers a dual-fuel option for either natural gas or propane. It’s designed for spaces up to about 1500 square feet, with a remote LCD control that manages ignition and flame height. The unit relies on a standing pilot to enable remote operation and includes manual flame adjustment.
- Best for: Medium-to-large living spaces where ventless operation is preferred and adjustable flame is valued.
- Why selected: High BTU output, dual-fuel capability, remote control for convenience, and a realistic log set.
- Limitation: Ventless design means it relies on room air for combustion; ensure proper clearances and ventilation per local codes.
LegendFlame Damon Electric Fireplace Insert

Although electric, this option is included for readers comparing glow and heat output with gas alternatives. It features a glass door, a realistic crackling sound, and remote control with two heating levels. Best for: spaces where wiring or venting is limited and you want a visible flame without gas.
- Best for: Consumers prioritizing aesthetic flame realism and electric heat in smaller rooms or apartments.
- Why selected: Strong visual appeal, flexible control, and no combustion byproducts.
- Limitation: Does not use gas; lacks dual-fuel capability.
72″ Recessed Electric Fireplace Insert

Best for: Large spaces or when you want a wide electric display with multiple flame settings and a remote. Why selected: Offers expansive flame visuals with practical temperature control in an electric format.
- Limitation: Not a dual-fuel gas insert; intended for electric installation.
50 Inch Electric Fireplace Inserts

Best for: Electric-only installations where dual-fuel is not required but a substantial flame display is desired. Why selected: Large size options and remote/touch controls for flexible setup.
- Limitation: Not a gas insert; does not support natural gas or propane.
Buying Guide: Key Considerations for Dual-Fuel Gas Inserts
- Fuel options: Look for models offering dual-fuel support (natural gas or propane) and verify the installation requirements for your home.
- Ventilation and code compliance: Ventless designs heat rooms efficiently but require proper clearance and ventilation per local codes. Consider room size and safety guidelines.
- Output and coverage: Match BTU ratings to the space you want heated. Higher BTU typically covers larger areas but may require more fuel and space considerations.
- Control features: Remote controls, LCD displays, and thermostat or manual flame adjustments improve user experience and energy management.
- Appearance and realism: For gas inserts, log sets and flame aesthetics matter. Ceramic fibers and designed logs influence the visual quality.
- Installation considerations: Free-standing inserts vs. insert-in-fireplace conversions, mounting options, and required clearances should align with your existing setup.
FAQ
- What does “dual-fuel” mean in a fireplace insert? It means the unit can operate on either natural gas or propane, giving flexibility based on fuel availability and cost.
- Do ventless gas inserts require a chimney? No external venting is needed, but room ventilation and local codes must be followed for safe operation.
- Can I use an electric fireplace insert as a substitute for a gas dual-fuel insert? Electric inserts offer flame aesthetics and heat, but they do not burn gas. They are a different category with distinct installation needs.
- Is remote control essential for gas inserts? Remote controls are convenient for turning the flame on/off and adjusting heat, especially when the insert is installed in a custom or hard-to-reach location.
- What should I consider when choosing BTU for my space? Choose BTU to match room size, insulation quality, and climate. Larger rooms require higher BTUs for consistent comfort.
- Are there safety concerns with dual-fuel gas inserts? Yes. Ensure proper installation, ventilation, carbon monoxide detectors, and adherence to local safety codes for safe operation.