If you need a true double-sided gas fireplace that shares one flame between indoor and outdoor rooms, none of the five products below is identified as a pass-through or see-through fireplace. They are related alternatives, including indoor gas inserts, an outdoor fire table, and a portable propane log heater. The Duluth Forge inserts are best for indoor heating, the Meilocar table is suited to outdoor entertaining, and the Flame King is the closest match for portable indoor-and-outdoor ambiance, subject to its instructions and local rules.
| Product | Best suited for | Key distinction |
|---|---|---|
| Duluth Forge QSL250T stove | Propane room heating | 25,000 BTU; thermostat |
| Duluth Forge FDI32R insert | Flexible indoor fuel choice | Natural gas or propane; remote |
| Duluth Forge FDF400RT-ZC insert | Indoor fireplace-style insert | Dual fuel; double doors |
| Meilocar fire table | Outdoor patio gatherings | 50,000 BTU; table format |
| Flame King ALOGFIRE | Portable flame ambiance | Indoor/outdoor use stated |
Duluth Forge QSL250T Propane Stove
This ventless liquid propane stove is best for someone who wants supplemental indoor heat with a freestanding stove format. Its listed output is 25,000 BTU, with heating coverage stated as up to 1,100 square feet. A thermostat control cycles the stove to maintain the selected room temperature.
The dual burner produces two rows of flames around five hand-painted ceramic fiber logs, making this a decorative heating option rather than a shared indoor-outdoor fireplace. It was selected for buyers prioritizing thermostat control and propane operation. It is not described as double-sided or rated for outdoor use; check local requirements and the product instructions before choosing a ventless appliance.
Duluth Forge FDI32R Dual-Fuel Insert
This insert is best for an indoor buyer who wants a choice between natural gas and liquid propane. The manufacturer lists 32,000 BTU output and heating coverage up to 1,500 square feet. Its remote with an LCD screen can turn the burner on and off, while manual flame adjustment provides another control option.
Nine hand-painted ceramic fiber logs and a mesh screen give it a traditional fireplace appearance. The listing describes vent-free operation without an outside duct or chimney, but this is not a two-sided indoor/outdoor unit. Choose it for indoor heating flexibility; avoid choosing it if a pass-through flame or outdoor installation is essential.
Duluth Forge FDF400RT-ZC Insert
The FDF400RT-ZC is best for buyers seeking an indoor ventless insert with dual-fuel capability and a more enclosed, finished appearance. Like the FDI32R, it is listed at 32,000 BTU, with coverage up to 1,500 square feet and operation on either natural gas or propane. Its remote includes an LCD screen, and the flame can also be adjusted manually.
This version has six hand-painted faux logs, mesh double doors, and a sprayed brick liner. Those details distinguish it from the FDI32R, which lists nine logs and a mesh screen. It remains an indoor insert, not a documented double-sided fireplace, and the product details do not establish outdoor suitability.
Meilocar 45-Inch Propane Fire Table
This fire table is best for outdoor patios, yards, terraces, and similar gathering areas where people want a flame beside a usable table surface. It provides 50,000 BTU according to the listing and measures 44.9 by 22.8 by 24.4 inches. Included items are a removable lid, glass wind guard, protective cover, glass stones, and instructions.
Its rectangular table design makes it a better fit for outdoor entertaining than the indoor fireplace inserts. However, it is an outdoor fire table, not a built-in indoor/outdoor pass-through fireplace. The listing specifically says to let the flames go out and the unit cool naturally before covering it.
Flame King ALOGFIRE Portable Log Heater
This is the closest listed match for someone seeking portable indoor-and-outdoor flame ambiance: the product description explicitly says it is for both settings and names patios, campers, and workshops. It reaches up to 8,200 BTU and is listed for spaces up to 300 square feet. The adjustable flame, easy-grip handle, and stated compatibility with 1-pound and standard 20-pound propane tanks support portable use.
The listed safety features include flameout protection, tip-over shut-off, and low-oxygen shut-off. Choose it for portability rather than for heating two rooms from one fireplace. Its compact log-style design is not described as double-sided; follow the product directions for where and how it may be operated.
Buying Guide: Choosing An Indoor/Outdoor Gas Fireplace
Do you need a true double-sided fireplace?
Look specifically for terms such as “see-through,” “two-sided,” or “pass-through,” and confirm that the model is designed for the exact wall or installation location. A portable heater, insert, or outdoor fire table does not become double-sided simply because it displays flames or can be placed near an opening. None of the five products here is presented as a shared-flame indoor/outdoor fireplace.
Where will the unit operate?
Match the product to its stated setting. The Duluth Forge options are described as ventless indoor appliances, while the Meilocar table is an outdoor product. Flame King states indoor and outdoor use, but buyers should verify the operating directions and any restrictions for their intended space. Local building and fire rules may also affect what can be installed.
Which fuel and heat output fit your needs?
Choose among the listings based on fuel access and the manufacturer’s stated output: the QSL250T uses propane at 25,000 BTU; the two Duluth Forge inserts accept natural gas or propane at 32,000 BTU; the Meilocar table lists 50,000 BTU; and the Flame King reaches 8,200 BTU. These figures describe different product types and do not make the units interchangeable.
What installation details should you confirm?
Before purchasing a built-in or ventless unit, confirm dimensions, clearances, fuel connection requirements, and whether local codes permit the appliance in the planned location. For outdoor products, consider the available surface and the included weather-related accessories. Do not assume a product’s indoor/outdoor wording means it can be permanently installed in either location.
Frequently Asked Questions
Are any of these products a true double-sided gas fireplace?
No. The supplied product descriptions do not identify any as a see-through or pass-through indoor/outdoor fireplace.
Which listed product is designed for outdoor gatherings?
The Meilocar 45-inch propane fire table is described for outdoor spaces such as patios, yards, terraces, and balconies.
Which options can use natural gas or propane?
The Duluth Forge FDI32R and FDF400RT-ZC inserts are listed as dual-fuel models for natural gas or liquid propane.
Which product explicitly states indoor and outdoor use?
The Flame King ALOGFIRE description states indoor and outdoor use. Check its instructions and local requirements for the intended setting.
Can an outdoor fire table be installed indoors?
The Meilocar listing describes it as an outdoor fire table, so do not assume it is suitable for indoor installation. Follow the manufacturer’s directions and applicable local rules.