A ventless ethanol fireplace insert requires liquid bioethanol fuel and an appliance specifically designed for it. Of the products listed here, the SmartFuel options are fuels, not fireplace inserts; the Duluth Forge models are ventless gas inserts, and the PuraFlame is electric. Use this comparison to identify the product type that matches your setup: SmartFuel is best for compatible ethanol appliances, Duluth Forge is for natural gas or propane, and PuraFlame is for electric operation.
| Product | Type | Best For |
|---|---|---|
| SmartFuel 1 L, Pack of 6 | Bioethanol fuel | Compatible liquid-fuel appliances |
| Duluth Forge FDI32R | Ventless gas insert | Natural gas or propane setups |
| SmartFuel 1 L, Pack of 12 | Bioethanol fuel | Compatible appliances needing fuel supply |
| PuraFlame Klaus | Electric insert | Flame effects with optional heat |
| Duluth Forge FDF400RT-ZC | Ventless gas insert | Gas heat with a traditional log look |
SmartFuel Bioethanol Fuel, 1 L Pack Of 6
This is bioethanol fuel, not an insert. It is intended for compatible bioethanol fireplaces, burners, tabletop fire pits, and stoves. The listed features describe plant-based denatured alcohol in one-liter bottles and a clean-burning, low-odor formula.
Best for: Owners of a liquid-fuel fireplace or burner whose manufacturer permits this type of fuel. The six-bottle format makes it a practical option when a multi-bottle supply is preferred.
Limitation: Confirm the appliance’s fuel requirements before use. This product does not include a fireplace insert.
Duluth Forge FDI32R Dual Fuel Insert
This is a ventless gas insert, not an ethanol fireplace. Its listed dual-fuel design can use natural gas or liquid propane. The manufacturer states a 32,000 BTU output, 99.9% efficiency, and heating coverage up to 1,500 square feet without an outside duct or chimney. It includes a remote with an LCD screen, manual flame adjustment, ceramic fiber logs, and a mesh screen.
Best for: Buyers seeking a gas insert and able to use one of its specified fuel types. Choose it over an ethanol option when gas heating and remote operation are the priorities.
Limitation: It burns natural gas or propane, not bioethanol. Verify fuel availability and installation requirements for your home.
SmartFuel Bioethanol Fuel, 1 L Pack Of 12
This 12-bottle option is a liquid fuel source for compatible ventless bioethanol fireplaces, tabletop fire pits, and burners. Its listed features describe a residue-free formula intended to burn in an appliance’s fuel reservoir without oily deposits.
Best for: People who already own a compatible liquid-bioethanol appliance and want a larger multi-bottle supply. It is a better fit than the six-pack when the buyer specifically prefers the listed 12-bottle quantity.
Limitation: It is fuel only. Do not assume it fits every ventless fireplace; check the appliance manual for approved fuel.
PuraFlame Klaus Electric Fireplace Insert
The Klaus is an electric insert, so it does not use ethanol. It offers three flame settings with adjustable intensity and brightness, which can operate with or without heat. Listed features include 750- and 1,500-watt settings, LED technology, a resin log, a brick-style interior, a glass door, and a mesh screen. The supplied dimensions are 35.04 inches wide, 26.96 inches high, and 8.78 inches deep.
Best for: Buyers who want adjustable flame effects and optional electric heat rather than a real liquid-fuel flame.
Limitation: It is not an ethanol or gas appliance. Check the listed dimensions against the intended opening before choosing it.
Duluth Forge FDF400RT-ZC Dual Fuel Insert
This Duluth Forge model is another ventless gas alternative, not an ethanol insert. It supports natural gas or liquid propane and is listed at 32,000 BTU, with stated heating coverage up to 1,500 square feet. The feature list includes a remote with LCD screen, manual flame adjustment, six hand-painted ceramic fiber logs, mesh double doors, and a sprayed brick liner.
Best for: Buyers who want a gas-powered insert with remote operation and a traditional log-and-brick appearance. Compare its double-door styling with the mesh-screen design of the FDI32R.
Limitation: It requires natural gas or propane rather than bioethanol. Confirm the intended fuel type and installation needs before purchase.
Buying Guide: How To Choose A Ventless Fireplace Product
Do you need an insert or fuel?
Start by identifying the item you are shopping for. The two SmartFuel listings are bottles of bioethanol fuel; neither is a fireplace insert. The Duluth Forge products are gas inserts, while the PuraFlame is electric. If you need an ethanol fireplace, look for an appliance specifically designed for liquid bioethanol, then select fuel that matches its instructions.
Which fuel type fits your home?
Choose bioethanol only for an appliance approved for that fuel. The Duluth Forge models use natural gas or liquid propane, so compare those options with the fuel source available to you. The PuraFlame uses electricity and provides flame effects with optional heat. These categories are not interchangeable.
What should you compare before buying?
- Appliance dimensions: Compare the insert’s stated measurements with the fireplace opening or planned location.
- Controls and appearance: The gas models list remote controls and manual flame adjustment; the FDI32R has nine logs, while the FDF400RT-ZC has six and mesh double doors.
- Fuel quantity: The SmartFuel listings offer six or twelve one-liter bottles. Choose based on your intended supply needs and the appliance’s fuel instructions.
- Heat and flame preferences: The gas inserts list 32,000 BTU; the electric model offers flame settings with or without heat. The fuel listings do not specify insert heat output.
Frequently Asked Questions
Are the SmartFuel products ethanol fireplace inserts?
No. They are bioethanol fuel products for compatible fireplaces, burners, and other listed appliances.
Can SmartFuel bioethanol be used in a Duluth Forge insert?
The listed Duluth Forge models are designed for natural gas or liquid propane, not bioethanol. Use the fuel specified for the appliance.
Which products in this list are ventless gas inserts?
The Duluth Forge FDI32R and FDF400RT-ZC are listed as ventless dual-fuel gas inserts.
Does the PuraFlame Klaus burn ethanol?
No. It is an electric fireplace insert with adjustable flame effects and optional heat.
How do I know whether bioethanol fuel is compatible?
Check the fireplace or burner manual for its approved fuel type and instructions before purchasing or using bioethanol.