For an outdoor fireplace, choose only a unit specifically approved by its manufacturer for outdoor installation. The products below are ventless gas inserts, a compatible firebox, and ceramic logs, but the supplied descriptions do not confirm that any is outdoor-rated. The Duluth Forge dual-fuel models are best for buyers comparing fuel options; the propane model suits buyers who need a propane-only insert. The ProCom is a firebox rather than a complete heater, and the Skyflame logs are an accessory, not an insert.
| Product | Best suited for | What to know |
|---|---|---|
| Duluth Forge FDI32R | Natural gas or propane flexibility | 32,000 BTU; remote included |
| Duluth Forge propane insert | Propane zone heating | 26,000 BTU; propane only |
| Duluth Forge FDF400RT-ZC | Dual-fuel setup with finished firebox styling | 32,000 BTU; remote included |
| ProCom PC32VFC | Custom firebox projects | Firebox only; gas log set sold separately |
| Skyflame ceramic logs | Replacing or styling compatible gas logs | Accessory set, not a fireplace |
Duluth Forge FDI32R Dual-Fuel Insert
Best for: Buyers comparing natural gas and liquid propane who want a remote-controlled insert. Its listed dual-fuel design supports either fuel, and the manufacturer description gives a maximum output of 32,000 BTU and a stated heating area of up to 1,500 square feet.
The unit includes a remote with an LCD screen for switching the burner on and off. A standing pilot supports remote operation, while a manual control adjusts the flame. Nine hand-painted ceramic-fiber logs and a mesh screen provide the finished-fireplace appearance.
Why it was selected: It combines the higher listed heat output among these complete inserts with fuel flexibility and remote operation. That makes it a useful comparison point for buyers who have access to either gas type.
Limitation: The product information describes an indoor vent-free heater and does not confirm outdoor approval. Do not assume it is suitable for a patio or exposed location; check the manual, local codes, and manufacturer guidance before considering installation.
Duluth Forge 26,000-BTU Propane Insert
Best for: Buyers who specifically want a liquid propane insert for zone heating. The listed output is up to 26,000 BTU, with a stated heating coverage of up to 1,350 square feet. It does not offer the natural-gas option described for the dual-fuel models.
The design can be recessed into a wall or paired with a face mantel, giving buyers more than one way to create a built-in look. The package description lists five hand-painted ceramic-fiber logs and a dual precision-ported burner. It is designed to operate without a chimney or ductwork, according to the product information.
Why it was selected: This is the most directly specified propane-only complete insert in the list. Choose it if propane is the intended fuel and a 26,000-BTU maximum is appropriate for the planned space.
Limitation: It is not described as dual-fuel, and the supplied details do not verify outdoor use. Its listed heating-area figure should not be treated as proof of suitability for an open or partially exposed patio.
Duluth Forge FDF400RT-ZC Dual-Fuel Insert
Best for: Buyers seeking natural-gas or propane flexibility with a more enclosed decorative front. Like the FDI32R, this insert is listed at 32,000 BTU and for heating spaces up to 1,500 square feet. Its description also lists a remote with an LCD screen and manual flame adjustment.
The distinguishing visual features are six hand-painted ceramic-fiber logs, mesh double doors, and a sprayed brick liner. The dual-fuel system lets the buyer select natural gas or liquid propane, according to the product description.
Why it was selected: It offers similar stated output and fuel flexibility to the FDI32R but has different front styling. Compare the appearance and installation requirements rather than assuming the models are interchangeable.
Limitation: The supplied information does not establish outdoor approval or provide installation dimensions. Confirm the required opening, fuel configuration, and location rules from the manufacturer documentation before purchase.
ProCom PC32VFC Universal Ventless Firebox
Best for: Buyers designing a custom fireplace surround who need a firebox, not a complete gas heater. The listing describes a slim-profile firebox approved for zero-clearance installation and suitable for recessing into a wall or pairing with a cabinet mantel.
It includes a draw screen, hood, and decorative sprayed brick liner. The listed airflow design aims to move heat through the firebox and provides an extra-large viewing area. The description says it is compatible with ventless gas log sets, so buyers should confirm the chosen log set and burner are suitable for this specific firebox.
Why it was selected: It is relevant to buyers assembling a ventless fireplace from separate components. Its installation flexibility may help with a custom indoor design, subject to the product instructions and applicable requirements.
Limitation: This is not presented as a complete insert with a burner or a specified BTU output. The listing does not confirm outdoor use, so it should not be treated as an outdoor-rated fireplace.
Skyflame Six-Piece Ceramic Birch Logs
Best for: Buyers who already have a compatible fireplace or fire pit and want decorative ceramic logs. This set contains six pieces in several listed sizes: two 15-by-3-inch logs, two 15-by-4-inch logs, and two 16-by-3.5-inch logs.
The product description says the logs are made from ceramic fiber and are intended for use with propane or natural gas. It also describes them as clean-burning, without ash, soot, debris, or residue from wood combustion. Measure the firebox and compare its instructions with the listed log sizes before buying.
Why it was selected: It is relevant as an accessory for a ventless gas fireplace project, particularly when replacing or changing the appearance of logs in a compatible setup.
Limitation: These logs are not a fireplace insert, burner, or standalone heat source. The product information does not establish compatibility with a particular firebox or approval for outdoor installation.
Buying Guide: How To Choose A Ventless Fireplace Insert
Is a ventless insert suitable for an outdoor fireplace?
Do not equate “ventless” with “outdoor-rated.” Ventless describes a product that does not use an outside duct or chimney as described in the listings; it does not, by itself, confirm that the appliance can be installed outdoors. The supplied product information identifies indoor heating uses or does not state an outdoor rating. For an outdoor project, check the exact model’s installation manual and ask the manufacturer whether the specific location is approved.
Consider how exposed the fireplace will be. A covered patio, an open-sided porch, and an uncovered yard are different installation environments. Do not infer suitability for rain, wind, moisture, or outdoor clearances unless the manufacturer expressly addresses those conditions. Local building and fire requirements may also affect what can be installed.
Should you choose propane or a dual-fuel insert?
Start with the fuel supply available at the installation location. The FDI32R and FDF400RT-ZC are listed as dual-fuel models for natural gas or liquid propane. The 26,000-BTU Duluth Forge model is described as propane-only. A dual-fuel description does not mean the insert automatically switches fuels; verify the product’s setup and conversion instructions before planning the installation.
Fuel type is only one part of the decision. Confirm the exact model configuration, required connections, and whether the appliance is approved for the intended location. Do not select a product solely because its fuel matches the home’s existing supply.
How much heat output do you need?
The listed BTU figures provide a comparison, not a guarantee that a unit will heat a particular outdoor area. The two 32,000-BTU models are listed for spaces up to 1,500 square feet, while the 26,000-BTU propane insert is listed for up to 1,350 square feet. These coverage claims are supplied by the product descriptions and should not be treated as a prediction for an open-air space.
Outdoor airflow, the amount of enclosure, and the distance between the heater and people can influence how useful warmth feels. Use the manufacturer’s guidance for the permitted installation and intended heating area rather than extrapolating indoor coverage figures to a patio.
Do you need a complete insert or separate components?
A complete gas insert, such as the listed Duluth Forge models, includes a burner and fireplace presentation in the described product. The ProCom PC32VFC is a firebox; its listing says it can work with a ventless gas log set, but it does not list a burner or BTU output. The Skyflame product is only a set of ceramic logs. Buyers assembling components must verify that every part is compatible and approved to operate together.
What measurements and features should you compare?
- Opening and fit: Measure the planned recess or mantel space, then compare it with the exact installation dimensions in the product manual. Dimensions are not included in the supplied descriptions for every item.
- Controls: The two 32,000-BTU dual-fuel inserts list remote operation and manual flame adjustment. The propane model’s supplied description does not list a remote.
- Appearance: Compare the number and style of ceramic logs, mesh screen or doors, and brick liner. These details distinguish the FDI32R from the FDF400RT-ZC.
- Included components: Determine whether the product is a heater, firebox, or log set. Do not assume accessories or a compatible burner are included unless the listing says so.
- Installation approval: Verify location, clearances, fuel setup, and all instructions for the exact model before purchase or installation.
Frequently Asked Questions
Can these ventless fireplace products be installed outside?
The supplied descriptions do not confirm outdoor approval for any of the five products. Check the exact model’s manual and obtain manufacturer guidance before considering outdoor installation.
Which listed insert offers the highest stated BTU output?
The Duluth Forge FDI32R and FDF400RT-ZC are each listed at 32,000 BTU. Their descriptions also state heating coverage of up to 1,500 square feet.
Which product is propane-only?
The Duluth Forge Liquid Propane Ventless Gas Fireplace Insert is described as propane-powered, with output up to 26,000 BTU. The two other Duluth Forge inserts are listed as dual-fuel.
Does the ProCom firebox include a gas burner?
The supplied description identifies the ProCom PC32VFC as a firebox compatible with ventless gas log sets. It does not list a burner or a BTU output, so confirm what components are included before buying.
Can Skyflame ceramic logs heat a room by themselves?
No. They are decorative ceramic logs intended for a compatible fireplace or fire pit, not a standalone burner or heater. Verify compatibility with the appliance manufacturer and compare the log dimensions with the firebox.
Are the listed square-foot heating figures reliable for a patio?
They are product-description figures for heating spaces and should not be assumed to apply to an open or partially open patio. Ask the manufacturer whether the unit is approved for the planned location and how its heating guidance applies there.