The best dual fuel ventless fireplace depends on how much space you need to heat and whether you want an insert, a freestanding stove, or a mantel-style unit. The Duluth Forge 32,000-BTU insert is best for larger rooms and remote operation; its 26,000-BTU stove suits buyers who want thermostat control. The ProCom 10,000-BTU system is a smaller-room option, while the Comfort Glow offers a 26,000-BTU alternative. The Touchstone is electric, not dual fuel, so it is included only as a vent-free alternative.
| Product | Type | Listed heating coverage | Best suited for |
|---|---|---|---|
| Duluth Forge FDI32R | Dual-fuel insert | Up to 1,500 sq. ft. | Larger rooms and remote operation |
| Duluth Forge FDSR25 | Dual-fuel stove | Up to 1,200 sq. ft. | Thermostat-controlled heating |
| ProCom FS100T-3AS | Dual-fuel fireplace system | Up to 500 sq. ft. | Smaller spaces and mantel styling |
| Comfort Glow GFD3810T | Dual-fuel fireplace | Up to 900 sq. ft. | Buyers seeking a 26,000-BTU option |
| Touchstone Sideline Elite 50 | Electric fireplace | Coverage not specified | Buyers who prefer electric operation |
Duluth Forge FDI32R Dual Fuel Insert
Best for: Buyers who need a higher-output insert-style fireplace and want a remote to operate the burner. This model is rated at 32,000 BTU and is listed to heat up to 1,500 square feet. Its dual-fuel design can use natural gas or liquid propane, according to the product details.
The included remote has an LCD screen and can turn the burner on or off. The unit also has manual flame adjustment. Its nine hand-painted ceramic-fiber logs and mesh screen provide a traditional fireplace appearance. The manufacturer describes the vent-free heater as 99.9% efficient and says it does not need an outside duct or chimney.
Why it stands out: It has the highest listed output and coverage among the four gas products here, making it the stronger choice for larger spaces when its installation requirements are met.
Limitation: Its 32,000-BTU capacity may be more than a small room needs. Confirm room suitability and local rules before choosing a vent-free gas appliance.
Duluth Forge FDSR25 Dual Fuel Stove
Best for: Buyers who want a freestanding stove-style heater with thermostat control. The FDSR25 is rated at 26,000 BTU and is listed to heat up to 1,200 square feet. It uses either natural gas or liquid propane, with a thermostat remote that lets users set a desired temperature.
The stove has six hand-painted ceramic-fiber logs. The product listing says the remote system requires four AA and two AAA batteries and that the batteries are included. Compared with the FDI32R insert, this model is a better fit for shoppers seeking the look and form of a freestanding stove rather than an insert.
Why it stands out: Its thermostat remote is a useful distinction for buyers who want the unit to cycle on and off to maintain a selected temperature, rather than relying only on manual flame adjustment.
Limitation: Battery power is required for the remote system. Check the product instructions for operating details and installation clearances.
ProCom FS100T-3AS Compact Fireplace System
Best for: Buyers seeking a lower-output dual-fuel fireplace for a smaller space. This 10,000-BTU system is listed to heat up to 500 square feet and can operate on natural gas or liquid propane. Its thermostat automatically cycles the heater on and off to maintain the selected room temperature.
The product includes a furniture-grade mantel with light distressing and burnished edges, four hand-painted ceramic-fiber logs, and a mesh screen. The listing describes it as a vent-free system that does not require an outside duct or chimney. Compared with the 26,000- and 32,000-BTU options, this model has a lower listed output and coverage.
Why it stands out: It combines thermostat control and a mantel-style appearance in a unit designed for a smaller listed area.
Limitation: Its listed coverage is limited to 500 square feet, so it is not the best match when the goal is heating a large open area.
Comfort Glow GFD3810T Dual Fuel Fireplace
Best for: Buyers who want a 26,000-BTU dual-fuel fireplace with a listed coverage area of up to 900 square feet. The GFD3810T operates on liquid propane or natural gas, and its walnut finish offers a furniture-style look.
The product listing describes the burner as 99.9% fuel efficient and says the unit does not require electricity. It is ventless, so a chimney is not required according to the listing. Its stated 900-square-foot coverage is lower than the Duluth Forge FDSR25’s 1,200-square-foot figure, despite the same listed BTU output.
Why it stands out: This is a straightforward option for shoppers comparing dual-fuel units by output, stated coverage, and finish. The no-electricity feature may also matter when comparing it with appliances that rely on electrical power.
Limitation: The supplied product details do not describe remote or thermostat controls. Review the complete product information to confirm the controls and installation specifications meet your needs.
Touchstone Sideline Elite Electric Fireplace
Best for: Buyers who want a recessed electric fireplace rather than a gas appliance. This product is not dual fuel and does not run on natural gas or propane, so it is not a direct match for a dual-fuel search. It is included as an alternative for shoppers prioritizing electric operation and an in-wall design.
The 50-inch unit has a 1,500-watt heater, six flame colors, ten media colors, three flame speeds, and five flame and fire-bed intensity settings. Its thermostat range is listed as 68–88°F. It can be plugged in or hardwired, and the package includes logs, driftwood, and crystals. The listing also describes remote and smart-device operation.
Why it stands out: It offers multiple flame and media appearance settings and a recessed mounting design, unlike the gas models above.
Limitation: It does not provide dual-fuel gas heating. Its listed features do not state a room-coverage figure.
Buying Guide: How To Choose A Dual Fuel Ventless Fireplace
What does dual fuel mean?
A dual-fuel gas fireplace is designed to operate on either natural gas or liquid propane. That flexibility can be useful when a home has access to one fuel now but may use the other, or when buyers want a choice between available fuel sources. Do not assume the appliance can switch fuels without setup. Check the product manual and installation requirements to determine how fuel selection and any conversion process work.
How much heating output do you need?
Compare both BTU output and the manufacturer’s stated coverage area. In this selection, the listed ratings range from 10,000 BTU and up to 500 square feet for the ProCom to 32,000 BTU and up to 1,500 square feet for the Duluth Forge insert. The Comfort Glow is listed at 26,000 BTU for up to 900 square feet, while the Duluth Forge stove is listed at the same output for up to 1,200 square feet.
These figures are product specifications, not a guarantee of performance in every home. Room layout, insulation, ceiling height, climate, and other heat sources can affect results. Match the appliance to the area you want to heat, and consult the product documentation rather than selecting only by the largest BTU number.
Should you choose an insert, stove, or mantel-style model?
- Choose an insert if an insert-style installation suits your room and you want the Duluth Forge FDI32R’s listed higher output and remote control.
- Choose a freestanding stove if you prefer the stove form and want the FDSR25’s thermostat remote.
- Choose a mantel-style system if you want a fireplace-and-mantel appearance; the ProCom listing describes a furniture-grade mantel.
- Compare finish and controls if considering the Comfort Glow, whose supplied details emphasize a walnut finish and fuel flexibility.
Product names and photos do not replace installation instructions. Check dimensions, clearances, placement requirements, and the exact installation type before ordering.
Is thermostat or remote control important?
Control features vary across these products. The FDI32R includes an LCD remote for turning the burner on and off and a manual flame adjustment control. The FDSR25 has a thermostat remote for setting a desired temperature. The ProCom uses thermostat control to cycle the heater. The supplied Comfort Glow details do not specify remote or thermostat functions, so verify those details before treating them as included.
Consider how you plan to use the fireplace. A thermostat can help maintain a selected room temperature, while a basic on/off remote may be sufficient for occasional use. Check whether controls require batteries and whether the listed package includes them.
What should you check before installing a ventless gas fireplace?
Ventless appliances do not use a conventional chimney or outside exhaust duct, but that does not mean every model is suitable for every room or location. Read the manufacturer’s manual and confirm that local building and fire rules permit the appliance. Check required clearances, room-size guidance, fuel connection requirements, and any ventilation instructions. When needed, ask a qualified installer or local authority to review the installation.
Also confirm which fuel the appliance is configured for and whether the home’s gas supply matches it. Never rely on a product’s stated coverage alone to determine installation suitability.
When is an electric fireplace the better comparison?
An electric model may be worth considering when you do not want a natural-gas or propane appliance. The Touchstone Sideline Elite is an electric, recessed unit with selectable flame and media settings and a listed 1,500-watt heater. It is not dual fuel, and its supplied product details do not state heating coverage. Compare it as a separate category rather than as a substitute with the same fuel flexibility.
Frequently Asked Questions
Can a dual fuel ventless fireplace use natural gas and propane?
The four gas fireplaces in this article are listed for natural gas or liquid propane. Check the manual for the correct fuel configuration and any requirements before installation or changing fuel types.
Does ventless mean a fireplace needs no installation checks?
No. Ventless means the product does not require a conventional chimney or outside duct according to its listing. Buyers still need to follow the manufacturer’s installation instructions and applicable local rules.
Which listed model has the highest heating coverage?
The Duluth Forge FDI32R is listed at up to 1,500 square feet. The stated coverage is a manufacturer specification and does not guarantee the same result in every room.
Which model is listed for the smallest space?
The ProCom FS100T-3AS is listed to heat up to 500 square feet, making it the smallest-coverage gas option in this comparison.
Is the Touchstone Sideline Elite dual fuel?
No. It is an electric fireplace with a 1,500-watt heater, not a natural-gas or propane appliance.
Do all the gas models include thermostat controls?
No. The FDSR25 and ProCom listings specify thermostat control. The FDI32R listing specifies remote on/off operation and manual flame adjustment, while the supplied Comfort Glow details do not state a thermostat feature.