Choosing the right propane fireplace insert can improve heating efficiency and room comfort while preserving the look of a traditional hearth. Below is a quick comparison of five ventless and dual-fuel inserts and log sets suitable for propane (liquid propane) use, followed by detailed product sections and a practical buying guide.
| Product | BTU | Approx. Coverage | Type |
|---|---|---|---|
| Duluth Forge Ventless 26,000 BTU | 26,000 | Up To 1,350 Sq. Ft. | Ventless Insert (Dual Fuel) |
| Duluth Forge Dual Fuel Ventless Insert (Thermostat) | 26,000 | Up To 1,350 Sq. Ft. | Ventless Insert (Dual Fuel, Thermostat) |
| Duluth Forge DLS-18R-1 18″ Log Set | 30,000 | Up To 1,000 Sq. Ft. | Ventless Log Set (Dual Fuel) |
| Duluth Forge Dual Fuel 32,000 BTU With Mantle | 32,000 | Up To 1,500 Sq. Ft. | Ventless Insert/System (Dual Fuel) |
| ProCom Dual Fuel Ventless With Mantle 10,000 BTU | 10,000 | Up To 500 Sq. Ft. | Ventless Insert/System (Dual Fuel) |
Duluth Forge Ventless 26,000 BTU Heats 1,350 Square Feet
This ventless gas fireplace insert offers 26,000 BTU output and is rated to heat up to 1,350 square feet. It supports both liquid propane and natural gas, giving installers fuel flexibility. The unit includes hand-painted logs cast in concrete for a realistic appearance and uses refractory ceramics to enhance lifespan. Operation is intended to be user-friendly with Piezo ignition and an included AAA battery for electric ignition backup. As a ventless insert, it does not require a chimney or outside ducting, which can simplify installation in many fireplace openings. The product is positioned as a high-output option for larger rooms or open-plan areas.
Duluth Forge Dual Fuel Ventless Gas Fireplace Insert With Thermostat
This model shares the 26,000 BTU capacity and dual-fuel ventless design, but emphasizes built-in thermostat control. The thermostat automatically cycles the unit to maintain the set temperature, which can improve comfort consistency and reduce fuel use compared to a manual-only model. The insert is described as nearly 99.9% efficient as a vent-free gas heater and includes five hand-painted ceramic fiber logs and a mesh screen for a finished look. The thermostat version is a practical choice when precise room temperature management is a priority.
Duluth Forge DLS-18R-1 Dual Fuel Ventless Fireplace Logs Set
The 18-inch split red oak log set is a ventless burner system designed for use with either natural gas or liquid propane. Rated at 30,000 BTU and intended to heat up to 1,000 square feet, it includes eight hand-painted ceramic logs, an iron grate, and a U-burner chassis to produce realistic flame and ember glow. Remote control operation and a standing pilot allow on/off control from a distance, and manual flame adjustment is available. This product is positioned to convert an existing open fireplace into a ventless propane-burning display while adding considerable heat output.
Duluth Forge Dual Fuel Ventless Gas Fireplace System With Mantle
This ventless system combines a high-output 32,000 BTU heater with a furniture-grade mantle and six hand-painted ceramic logs. It is claimed to heat up to 1,500 square feet and includes a remote with an LCD to toggle between manual and thermostat modes. The system emphasizes a finished appearance, with double doors, a sprayed brick liner, and an antique white mantle option. As a ventless insert, it is designed for locations where adding a chimney or flue is not practical and where a strong heat source is desired for larger spaces.
ProCom Dual Fuel Ventless Gas Fireplace System With Mantle 10,000 BTU
The ProCom mantel system is a lower-output ventless option rated at 10,000 BTU and sized for spaces around 500 square feet. It supports both natural gas and propane and uses a thermostat to cycle operation for temperature control. The system includes four hand-painted ceramic logs and a furniture-grade mantle with a mesh screen, aiming to balance decorative appeal and modest supplemental heat. This model is positioned for smaller rooms, supplemental heating, or installations where high heat output is unnecessary.
Buying Guide: Choosing The Right Propane Fireplace Insert
Selecting a propane (liquid propane) fireplace insert requires balancing heating needs, installation constraints, safety, and aesthetics. Below are the key factors to compare and confirm before purchase and installation.
Heat Output And Coverage
- BTU Rating — Match BTU capacity to room size and heat loss. Higher BTUs heat larger areas but may be overkill for small rooms.
- Square Foot Coverage — Manufacturer coverage is an estimate; factors such as insulation, ceiling height, and open floor plans affect actual performance.
Ventless vs. Vented (Insert Type)
- Ventless (Vent-Free) — Easier installation because no chimney or flue is required. They are typically more efficient at delivering heat to the room. Local codes and indoor air quality concerns may restrict ventless unit use in some areas.
- Vented/Direct Vent — Not covered by the selections above but important to consider if you prefer outside exhaust and sealed-combustion safety. They typically cost more to install.
Fuel Compatibility And Conversion
- Dual-Fuel Options — Many inserts support both natural gas and propane; confirm if conversion kits or orifice changes are required and whether those parts are included.
- Supply And Hookup — Ensure you have or can safely install a propane supply line in accordance with local codes and appliance specifications.
Controls And Thermostat Features
- Thermostat Control — Automates temperature maintenance and can reduce running time and fuel use compared to manual-only controls.
- Remote And Electronic Ignition — Remote on/off and flame adjustments add convenience. Check if standing pilot or electronic ignition is used and its battery or electrical requirements.
Appearance And Log/Insert Materials
- Log Materials — Ceramic fiber and refractory ceramics produce realistic logs and a long lifespan. Evaluate log realism, ember bed options, and whether a mesh or glass front is preferred.
- Mantle And Surround — Some systems include a mantle or decorative surround to finish the look of a room-facing fireplace.
Safety, Codes, And Indoor Air Quality
- Local Codes — Ventless appliances are regulated differently by jurisdiction. Check local building and fire codes before installing.
- Carbon Monoxide And Oxygen Depletion — Use CO detectors and follow manufacturer minimum clearances. Some ventless models include ODS (oxygen depletion sensors) as required in many areas.
Installation And Maintenance
- Professional Installation — Gas appliances typically require certified installers to ensure proper gas line sizing, pressure, and safe connections.
- Maintenance Needs — Inspect burners, pilot assemblies, and log placement periodically; follow cleaning and service intervals recommended by the manufacturer.
Energy Efficiency And Operating Costs
- Efficiency Ratings — Ventless units often advertise very high efficiency because none of the heat is vented away, but real-world efficiency depends on usage patterns and thermostat control.
- Operating Considerations — Thermostat-controlled units and remote features can reduce fuel consumption by preventing unnecessary run time.
Comparison Perspectives
- High Output For Large Areas — Choose 26,000–32,000 BTU models when heating large living rooms or open layouts.
- Mid/Small Room Needs — 10,000–30,000 BTU log sets and mantel systems suit medium and smaller spaces; consider the ProCom 10,000 BTU for modest heating.
- Appearance-Focused Installations — If aesthetics are top priority, look for detailed ceramic logs, mantles, and finished liners for a built-in look.
- Control-Focused Users — Thermostat and remote-equipped units provide better comfort management and may reduce fuel waste.
Confirm compatibility with your fireplace opening dimensions, local regulations, and professional installer recommendations before purchase. Proper selection and installation ensure safe operation and expected heating performance for propane-powered fireplace inserts.