Gas fireplace inserts offer a clean, efficient alternative to wood-burning fires, delivering warmth with minimal maintenance. For homeowners, choosing the right insert involves evaluating heat output, fuel options, installation requirements, and realistic flame aesthetics. The following picks highlight ventless dual-fuel models and decorative gas log sets from Duluth Forge and Comfort Glow that fit a range of spaces from compact living areas to larger rooms. Each product combines authentic flame visuals with practical features such as remote control and thermostat-style operation. Use the buying guide below to compare options and select the best fit for your home.
Summary table of selected products helps you compare core specs at a glance. Heaters are listed with their top BTU, estimated heating area, and fuel type. All options below are designed to operate without external ducting, making them suitable for upgrading existing fireplaces or converting spaces to efficient gas warmth.
| Product | BTU | Heating Area (sq ft) | Fuel Type | Notes |
|---|---|---|---|---|
| Duluth Forge 9-Log Dual Fuel Insert | 32000 | Up to 1500 | Natural Gas or LP | Remote with LCD; 99.9% efficient; ventless |
| Duluth Forge 6-Log Dual Fuel Insert | 32000 | Up to 1500 | Natural Gas or LP | Remote with LCD; ventless; dual-fuel |
| Duluth Forge 5-Log Dual Fuel Insert | 26000 | Up to 1350 | Natural Gas or LP | Thermostat control; remote; ventless |
| DLS-18R-1 Dual Fuel Log Set | 30000 | Up to 1000 | Natural Gas or LP | Remote; 18-inch logs; realistic flames |
| Comfort Glow 24″ Highland Ember Log Insert | Unknown (log set) | Up to 1400 | LP/NG | Remote; adjustable thermostat; dual-fuel |
Duluth Forge 32000 BTU 9-Log Insert
This 9-log configuration represents a high-output, ventless dual-fuel option designed to heat larger spaces. The patented ventless dual-fuel technology supports Natural Gas or Liquid Propane, delivering up to 32000 BTU while claiming 99.9% efficiency. No external duct or chimney is required, enabling installation in existing fireplaces or new builds without major venting. The remote control with an LCD screen simplifies operation, allowing you to turn burners on/off and adjust settings from a distance. A standing pilot supports manual flame control if needed. The nine hand-painted logs and a mesh screen create a realistic, visually appealing firebox. This insert aims to blend strong performance with aesthetic realism for living rooms up to 1500 sq ft.
- Ventless dual-fuel technology (NG or LP)
- Remote control with LCD; standing pilot
- 9 hand-painted ceramic logs; mesh screen
- High efficiency; no external venting required
Duluth Forge 32000 BTU 6-Log Insert
This 6-log version provides a slightly more compact flame display while maintaining the same dual-fuel capability and high efficiency. With 32000 BTU output and the option to burn Natural Gas or Liquid Propane, it heats spaces up to about 1500 sq ft. The included remote control with an LCD screen allows convenient operation from across the room, and a standing pilot supports manual flame control if required. The 6-log configuration features a stylish double-door look with a brick- liner effect to enhance the fireplace aesthetics while delivering reliable heat.
- Remote control with LCD
- Ventless dual-fuel operation
- 32000 BTU; heats up to 1500 sq ft
- Mesh double doors and decorative liner
Duluth Forge 26000 BTU Dual Fuel Insert
This model emphasizes thermostat-style operation and a strong balance between heat output and energy efficiency. With 26000 BTU and the option to burn either NG or LP, it is suited for mid-sized rooms up to about 1350 sq ft. The thermostat control automatically cycles the burner to maintain a comfortable temperature, while the remote and standing pilot provide flexible control. The package includes five hand-painted logs that offer a realistic flame presentation and a mesh screen to frame the firebox visually. This insert is ideal for users who want dependable warmth with streamlined temperature management.
- Thermostat control with automatic cycling
- Remote control; standing pilot
- 26000 BTU; heats up to 1350 sq ft
- Ventless dual-fuel; decorative mesh screen
Duluth Forge DLS-18R-1 Dual Fuel Log Set
This 18-inch log set offers a realistic gas-burning ambiance as part of a dual-fuel ventless system. The set includes an 18-inch log arrangement with a specialized iron grate and an U-burner chassis to produce authentic flames and glow. Remote operation and a standing pilot support straightforward control, with manual flame adjustment allowing custom flame height. At 30,000 BTU, it heats up to about 1000 sq ft, making it a solid choice for medium-sized spaces or as an upgrade to an existing fireplace that lacks efficient heat. The stacked red oak appearance provides a natural wood look that enhances overall aesthetics.
- Remote control; standing pilot
- 18-inch logs; realistic flame and glow
- Ventless dual-fuel; 30000 BTU
- Iron grate and U-burner chassis
Comfort Glow 24-Inch Highland Ember Log Insert
The Comfort Glow Highland Ember log set is designed for dual-fuel use with natural gas or propane. Its 24-inch log configuration delivers a compact but substantial flame presence that enhances the ambiance while delivering warmth to indoor spaces up to about 1400 sq ft. A thermostat remote lets users adjust heat levels from a distance, and the LED-illuminated ember bed provides a realistic glow even when the flame is modest or off. The 8-piece log set uses deep-textured oak visuals to emulate a traditional wood-burning look, offering a low-maintenance alternative to wood fuel without sacrificing fireplace aesthetics.
- Dual-fuel compatibility (NG/LP)
- Thermostat remote; redesigned receiver
- 8-piece Highland Ember log set
- 24″ size with ember glow and realistic flames
Buying Guide
Choosing the right fireplace gas insert depends on how you plan to heat your space, how you want the flame to look, and how you want to operate the unit. Below are key considerations and practical comparisons to help you decide which option best fits your home.
Space And Heating Requirements
Evaluate your room size and insulation when estimating BTU needs. Ventless dual-fuel inserts like many Duluth Forge options deliver substantial heat without ducting, but the highest BTU units (up to 32000 BTU) are best suited for open-concept living spaces or larger rooms. If you have a smaller area, a 26000 BTU or 30000 BTU model may provide ample warmth without overheating. For decorative or supplemental heat, log sets with 18- to 24-inch configurations can create ambiance while delivering targeted radiant warmth.
Ventless Versus Venting
Ventless (or vent-free) gas inserts release combustion byproducts into the room but are designed to meet safety and efficiency standards for indoor use. They eliminate the need for a chimney or exterior venting, simplifying installation. Vented gas log sets, such as RealFyre options or traditional log sets, require an existing vent and can represent a different installation approach. Consider room ventilation, local codes, and your comfort level with ventless operation when choosing a unit.
Fuel Type: Natural Gas Versus Propane
Dual-fuel inserts provide flexibility to use either natural gas or propane. If your home is already plumbed for natural gas, a NG option minimizes fuel costs. Propane offers a reliable alternative where natural gas isn’t available, though propane tanks require periodic maintenance and refill logistics. If you anticipate switching fuels seasonally, a dual-fuel model helps maintain consistent performance across fuel types.
Controls: Remote, Thermostat, And Manual Options
Remote controls with LCD displays are common and convenient for adjusting flame height and heat output. Thermostat control helps maintain a constant room temperature by automatically cycling the burner. Manual control via standing pilot can be useful during power outages or when you want direct flame management. When selecting a unit, consider which control method best fits your lifestyle and how often you’ll use the fireplace for consistent comfort.
Flame Realism And Aesthetics
Log realism varies among models, with some featuring hand-painted ceramic logs and detailed ember beds to mimic real wood. The visual appeal matters for most homeowners, especially when the insert is in a primary living area. Consider log color (e.g., Split Red Oak, Highland Ember) and flame patterns as part of your overall interior design.
Installation And Safety Considerations
Installation requirements differ by model, including clearance from combustibles, distance to walls, and the need for gas line connections. Ensure proper mounting and secure placement within the fireplace cavity. Check for compatible trim kits and access to a reliable electrical outlet for the remote receiver. Safety features like a standing pilot, automatic shutoff, and child-safe screens should be part of your selection criteria, particularly in homes with children or pets.
Maintenance, Durability, And Warranties
Regular maintenance includes inspecting gas lines, cleaning logs and ember beds, and ensuring the remote sensor remains unobstructed. Ceramic logs and refractory materials should withstand heat without cracking. Look for products backed by warranties that reflect build quality and customer support. A well-supported brand will provide replacement parts and clear guidance on servicing and safe operation over time.
Compatibility With Existing Fireplaces and Aesthetics
Consider whether you’re upgrading an existing wood-burning fireplace or installing into a masonry or metal firebox. Some inserts are designed to fit standard dimensions, while others require customization. The final choice should align with your interior style, from the traditional look of split-red oak logs to the sleeker appearance of modern mesh screens. Aesthetic congruence with your room is essential for long-term satisfaction.