When choosing a gas fireplace insert, the goal is to find a unit that offers reliable heat, ease of use, and a style that complements your home. The Duluth Forge FNF300R stands out as the best overall for its balance of power, remote control, and ease of installation. For those seeking budget-friendly options, the Duluth Forge Liquid Propane Ventless Gas Fireplace provides solid performance at a lower price. Meanwhile, the ProCom Zero Clearance models appeal to buyers focused on flexibility and installation options. Keep reading for a detailed breakdown of these options and how to find the right fit for your needs.
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Key Takeaways
- The most powerful units deliver higher BTU ratings but may require more installation considerations.
- Ventless models offer easier installation and cleaner aesthetics but may have stricter safety and ventilation considerations.
- Dual-fuel options provide flexibility but tend to be more complex and costly to operate.
- Remote and thermostat controls significantly enhance user convenience, especially for larger spaces.
- Price varies widely, with budget models suitable for smaller rooms and premium units ideal for large, high-end living areas.
| gas fireplace insert | Dimensions | Fuel Type | Weight | BTU |
|---|---|---|---|---|
| Duluth Forge Natural Gas Ventl | 29.1" W x 23.9" H x 13.9" D | Natural Gas | 47.6 lbs | 26,000 |
| Duluth Forge Liquid Propane Ve | 29.1" W x 23.9" H x 13.9" D | Liquid Propane | 47.6 lbs | — |
| ProCom 36in. Universal Ventles | 36 inches | — | — | — |
| ProCom 36in. Universal Ventles | 36.8" H x 43" W x 19" D | — | 83.8 lbs | — |
| Duluth Forge Dual Fuel Ventles | 18.38" H x 33.27" W x 36.38" D | Natural Gas or Liquid Propane | 88.2 lbs | 32,000 |
| Duluth Forge Ventless Gas Fire | 29.1"W x 23.9"H x 13.9"D | Natural Gas | 47.6 lbs. | — |
| Duluth Forge Liquid Propane Ve | 29.1"W x 23.9"H x 13.9"D | Liquid Propane | 47.6 lbs | 26,000 |
| Duluth Forge Dual Fuel Ventles | 15.6"H x 29.1"W x 29.5"D | Natural Gas / Liquid Propane | 69.5 lbs | 32,000 |
| Duluth Forge Dual Fuel Ventles | 15.6"H x 29.1"W x 29.5"D | Natural Gas or Liquid Propane | — | 32,000 |
More Details on Our Top Picks
Duluth Forge Natural Gas Ventless Gas Fireplace Insert – 26,000 BTU, Remote Control – Model FNF300R
This model stands out for its flexible installation options, allowing it to be built flush into walls or paired with mantels, making it ideal for custom home designs. Compared with the liquid propane version, it offers a reliable natural gas connection, which many homeowners prefer for convenience and safety. Its high efficiency of 99.9% ensures minimal energy waste, while the realistic ceramic fiber logs and natural flame effect add to its appeal. However, installation requires a natural gas line and the blower is sold separately, which can add to costs. This pick makes the most sense for homeowners seeking a sleek, built-in look with efficient heat delivery. Specs: BTU: 26,000; Heating Area: 1,350 sq. ft.; Fuel Type: Natural Gas; Remote Control: Yes; Dimensions: 29.1″ W x 23.9″ H x 13.9″ D; Weight: 47.6 lbsPros:- Flexible installation options for custom fits
- High efficiency at 99.9%
- Realistic logs and flame effect
Cons:- Requires natural gas line, limiting placement options
- Blower sold separately adds extra cost
Best for: Homeowners wanting a high-customization, wall-inset fireplace that blends seamlessly into their space
Not ideal for: Renters or those with no access to natural gas lines, since it requires a dedicated gas connection
- BTU:26,000
- Heating Area:1,350 sq. ft.
- Fuel Type:Natural Gas
- Remote Control:Yes
- Dimensions:29.1″ W x 23.9″ H x 13.9″ D
- Weight:47.6 lbs
Our verdict“This insert is perfect for those seeking a customizable, built-in gas fireplace with realistic visuals and efficient operation.”
Duluth Forge Liquid Propane Ventless Gas Fireplace Insert
This ventless propane insert offers a high heat output of 26,000 BTUs, matching the natural gas model but with the advantage of not requiring a gas line, making it suitable for more flexible placement. Its realistic, hand-painted logs and flame effects deliver a cozy aesthetic comparable to the natural gas version, yet it depends entirely on propane refills, which could be less convenient over time. The advanced safety features and 99.9% efficiency make it a practical choice for large spaces. Unlike ventless logs that require a specific fuel, propane offers easy refillability but may involve ongoing costs. This makes it ideal for those who lack natural gas access but want a seamless, ventless setup. Specs: Maximum BTU: 26,000; Heating Area: 1,350 sq. ft.; Fuel Type: Liquid Propane; Dimensions: 29.1″ W x 23.9″ H x 13.9″ D; Weight: 47.6 lbs; Efficiency: 99.9%Pros:- No venting needed, flexible placement
- Realistic flame effects with hand-painted logs
- High heat output suitable for large rooms
Cons:- Propane refilling can be inconvenient and costly
- Blower sold separately, increasing total expense
Best for: Homeowners without natural gas lines who want a ventless, propane-powered fireplace
Not ideal for: Users looking for a permanent, natural gas solution, or those who prefer propane-free operation due to ongoing refill costs
- Maximum BTU:26,000
- Heating Area:1,350 sq. ft.
- Fuel Type:Liquid Propane
- Dimensions:29.1″ W x 23.9″ H x 13.9″ D
- Weight:47.6 lbs
- Efficiency:99.9%
Our verdict“This propane insert offers a versatile, ventless fireplace experience for those lacking natural gas infrastructure.”
ProCom 36in. Universal Ventless Firebox Insert – Zero Clearance Design
The ProCom 36-inch firebox is designed with a decorative sprayed brick liner and an expansive viewing window, making it ideal for those who want a stylish centerpiece. Its high-quality build and American assembly give confidence in durability. Compared to smaller inserts, its larger size provides more substantial heat output and visual impact, but it requires a gas line connection and only supports ventless gas logs, limiting fuel options. Its straightforward installation makes it suitable for custom wall setups, but the need for a dedicated gas supply could be a barrier. This product suits homeowners prioritizing a large, decorative gas fireplace in a fixed location. Specs: Model: PC36VFC; Size: 36 inches; Material: High-quality; Assembly: Assembled in USA; Features: Airflow Technology, Zero Clearance, Recessed or Wall-Mounted, includes Draw Screen and HoodPros:- Large viewing window for dramatic visual impact
- Decorative sprayed brick liner enhances style
- High-quality materials and American assembly
Cons:- Requires a gas line, limiting placement options
- Only supports ventless gas logs
Best for: Homeowners seeking a large, stylish fireplace with a substantial viewing area in a fixed space
Not ideal for: People needing a lightweight, portable option or those without a dedicated gas line
- Model:PC36VFC
- Size:36 inches
- Material:High-quality
- Assembly:Assembled in USA
- Features:Airflow Technology, Zero Clearance
- Dimensions:36 inches
Our verdict“This firebox is a great choice for those wanting a sizable, stylish insert with a decorative flair and ample heat output.”
ProCom 36in. Universal Ventless Firebox Insert – Zero Clearance Design
This ProCom firebox emphasizes a slim profile (36.8” H x 43” W x 19” D), perfect for installations in narrower or space-constrained areas. Its airflow system enhances heat circulation, making it more effective in delivering warmth compared to bulkier units like the larger firebox. With compatibility for ventless gas logs, it offers flexible aesthetic options. The weight of nearly 84 pounds means installation may require assistance, and its large size still demands a dedicated gas connection. The lighter profile and better heat flow make this suitable for tight spots, but the absence of included logs and its weight could be drawbacks for DIYers. It’s ideal for those needing a sleek, space-efficient fireplace. Specs: Dimensions: 36.8” H x 43” W x 19” D; Weight: 83.8 lbs; Material: High-quality; Assembly: USA; Features: Unique airflow system, Compatible with ventless gas logsPros:- Slim profile for tight spaces
- Enhanced heat flow due to airflow system
- Compatible with ventless gas logs
Cons:- Heavy and may require help for installation
- Logs not included, additional costs for aesthetic options
Best for: Homeowners with limited space needing a slim, recessed fireplace that still heats effectively
Not ideal for: Those seeking a lightweight or portable option, or who want included logs or decorative features
- Dimensions:36.8″ H x 43″ W x 19″ D
- Weight:83.8 lbs
- Material:High-quality
- Assembly:USA
Our verdict“This slim, efficient firebox is best for tight spaces where effective heating and space-saving design matter most.”
Duluth Forge Dual Fuel Ventless Gas Fireplace Insert – 32,000 BTU, Remote Control
This dual fuel insert combines the convenience of natural gas or propane, offering 32,000 BTUs to heat up to 1,500 sq. ft., making it suitable for larger rooms. Compared to single-fuel models like the natural gas or propane-only inserts, it provides greater versatility, especially for households with changing fuel availability. Its remote with LCD control simplifies operation, and the realistic ceramic logs enhance visual authenticity. However, its size at nearly 88 pounds demands sturdy installation support, and it requires a minimum clearance of 42 inches from the ceiling, which could limit placement options. This model makes the most sense for those needing maximum heating flexibility in larger spaces. Specs: BTU: 32,000; Fuel Type: Natural Gas or Propane; Efficiency: 99.9%; Dimensions: 18.38″ H x 33.27″ W x 36.38″ D; Weight: 88.2 lbsPros:- Dual fuel capability for maximum flexibility
- High BTU output for large spaces
- Remote control with LCD for easy operation
Cons:- Heavy and requires sturdy support
- Minimum ceiling clearance of 42 inches
Best for: Larger homes or spaces where fuel options may vary, and flexible operation is desired
Not ideal for: Small apartments or spaces with ceiling clearance restrictions under 42 inches
- BTU:32,000
- Fuel Type:Natural Gas or Liquid Propane
- Efficiency:99.9%
- Dimensions:18.38″ H x 33.27″ W x 36.38″ D
- Weight:88.2 lbs
Our verdict“This dual fuel insert offers maximum versatility and heating power for sizable areas with flexible fuel needs.”
Duluth Forge Ventless Gas Fireplace Insert – 26,000 BTU, T-Stat Control, Model FNF300T
This ventless insert stands out for its powerful 26,000 BTU output, making it suitable for heating spaces up to 1,350 sq. ft., which surpasses the capacity of smaller models like the Duluth Forge Liquid Propane Ventless Insert. The zero clearance design offers flexible installation options—recessed or wall-mounted—and the smart thermostat provides automatic temperature adjustments that improve comfort and efficiency. Compared with the dual-fuel models, it eliminates the need to switch fuel types but requires a fixed natural gas connection, limiting flexibility. The realistic flame effects and hand-painted logs add a cozy ambiance, yet the need for a natural gas line and the separate blower (sold separately) are notable tradeoffs. Overall, this insert suits homeowners who prioritize heating large rooms with minimal fuss but have access to natural gas supply.
Pros:- High heating capacity suitable for large spaces
- Flexible zero-clearance installation options
- Smart thermostat for automatic temperature control
- Realistic flame and hand-painted logs
Cons:- Requires natural gas connection, not electric or propane
- Blower sold separately, adding to total cost
Best for: Homeowners with access to natural gas who want a robust, large-area heating solution with customizable aesthetics.
Not ideal for: Renters or those without a natural gas line, since it cannot operate on propane or electricity alone.
- Maximum BTU:26,000
- Heating Area:1,350 sq. ft.
- Fuel Type:Natural Gas
- Dimensions:29.1″W x 23.9″H x 13.9″D
- Weight:47.6 lbs.
- Safety Features:Oxygen Depletion Sensor, automatic shut-off
Our verdict“This model is ideal for those seeking a powerful, large-area ventless fireplace with customizable installation options and natural gas access.”
Duluth Forge Liquid Propane Ventless Gas Fireplace Insert – 26,000 BTU, Remote Control
Compared with the natural gas version, this propane model offers the convenience of remote control operation and flexible placement, making it a better fit for homeowners without a gas line. The zero clearance design allows flush wall installation, and the realistic ceramic logs create authentic visual appeal. Its 26,000 BTU output heats up to 1,350 sq. ft., matching the power of larger units like the dual-fuel models but with the added benefit of propane portability. The ventless operation simplifies installation, yet it requires proper ventilation and safety measures—an important consideration compared with vented models like the Duluth Forge Dual Fuel Insert. The blower is sold separately, which can increase overall costs. This pick makes the most sense for those seeking an easy-to-operate, space-saving heating solution that doesn’t rely on natural gas lines.
Pros:- Remote control for convenient operation
- Zero clearance design for flush wall installation
- Authentic ceramic fiber logs for realism
- Flexible propane fuel option
Cons:- Blower sold separately, increasing total cost
- Requires careful safety precautions due to ventless operation
Best for: Homeowners seeking a portable, easy-to-install insert that runs on propane and includes remote control.
Not ideal for: Homeowners who prefer electric or vented systems, or those who want an integrated blower included with purchase.
- BTU:26,000
- Heating Area:1,350 sq. ft.
- Fuel Type:Liquid Propane
- Dimensions:29.1″W x 23.9″H x 13.9″D
- Weight:47.6 lbs
- Safety Features:Oxygen Depletion Sensor with automatic shut-off
Our verdict“This propane ventless insert is best for those wanting easy installation and remote operation without the need for a gas line.”
Duluth Forge Dual Fuel Ventless Gas Fireplace Insert – 32,000 BTU, Remote Control
This dual-fuel insert stands out for its 32,000 BTU heating capacity, making it suitable for rooms up to 1,500 sq. ft., which exceeds the power of the single-fuel models and offers unmatched flexibility. Its dual fuel capability allows switching between natural gas and propane, providing adaptability to different homes and fuel availability. The inclusion of a remote control with an LCD screen simplifies operation, and the realistic ceramic fiber logs contribute to a compelling visual. Compared to the other models, this unit’s higher BTU output makes it better suited for larger or more variable spaces, but it requires a minimum ceiling clearance of 42 inches and is heavier, complicating installation. This choice is ideal for homeowners who want maximum fuel flexibility and higher heating capacity in a ventless format.
Pros:- Dual fuel capability for maximum flexibility
- High 32,000 BTU output suitable for larger rooms
- Remote control with LCD for ease of use
- Realistic logs enhance aesthetic appeal
Cons:- Requires a minimum ceiling clearance of 42 inches
- Heavy weight may require assistance during installation
Best for: Homeowners needing a versatile, high-capacity insert that can operate on either natural gas or propane.
Not ideal for: Those with limited ceiling height or seeking a lightweight, easy-to-install option.
- BTU:32,000
- Fuel Type:Natural Gas / Liquid Propane
- Efficiency:99.9%
- Dimensions:15.6″H x 29.1″W x 29.5″D
- Weight:69.5 lbs
Our verdict“This dual-fuel model offers the greatest flexibility and power for larger spaces, perfect for those who want options in fuel source.”
Duluth Forge Dual Fuel Ventless Gas Fireplace Insert – 32,000 BTU, Thermostat Control
Compared to the remote-controlled dual-fuel option, this model emphasizes automatic temperature regulation through its built-in thermostat, making it an excellent choice for those who prioritize consistent comfort. With 32,000 BTU, it heats up to 1,500 sq. ft., matching the power of the other dual-fuel insert but including an automatic thermostat that maintains room temperature automatically, reducing the need for manual adjustments. Its realistic ceramic logs and high efficiency of 99.9% ensure both aesthetic appeal and effective heating. The heavy weight and a ceiling clearance requirement of at least 42 inches are tradeoffs that could complicate installation. This pick suits homeowners wanting a set-and-forget system that maintains a steady temperature, especially in larger spaces.
Pros:- Automatic thermostat for consistent room temperature
- High 32,000 BTU output for large spaces
- Dual fuel flexibility for natural gas or propane
- Realistic ceramic fiber logs
Cons:- Requires minimum ceiling clearance of 42 inches
- Heavy weight may require extra help during installation
Best for: Homeowners who prefer automatic temperature control over manual operation and need consistent heat in sizable rooms.
Not ideal for: Those seeking a lightweight, easy-to-install insert or who prefer remote control-based operation.
- BTU:32,000
- Fuel Type:Natural Gas or Liquid Propane
- Efficiency:99.9%
- Dimensions:15.6″H x 29.1″W x 29.5″D
- Includes:6 ceramic logs, iron grate, 1 AAA battery
Our verdict“This model is best for those who want reliable, automatic temperature control in a powerful dual-fuel insert.”
How We Picked
I evaluated each gas fireplace insert based on performance, ease of installation, safety features, control options, and value for money. Performance was measured primarily through BTU output and heat distribution, ensuring the units can effectively warm different space sizes. Ease of installation and maintenance were also key factors, favoring models with zero-clearance designs or ventless operation. Safety features like automatic shutoff and reliable controls were critical, as was user convenience provided by remote or thermostat controls. The ranking reflects a balance of these factors, with a focus on models that offer reliable performance without excessive complexity or cost.| gas fireplace insert | Fuel Type |
|---|---|
| Duluth Forge Natural Gas Ventl | Natural Gas |
| Duluth Forge Liquid Propane Ve | Liquid Propane |
| ProCom 36in. Universal Ventles | — |
| ProCom 36in. Universal Ventles | — |
| Duluth Forge Dual Fuel Ventles | Natural Gas or Liquid Propane |
| Duluth Forge Ventless Gas Fire | Natural Gas |
| Duluth Forge Liquid Propane Ve | Liquid Propane |
| Duluth Forge Dual Fuel Ventles | Natural Gas / Liquid Propane |
| Duluth Forge Dual Fuel Ventles | Natural Gas or Liquid Propane |
Factors to Consider When Choosing Gas Fireplace Insert
Choosing the right gas fireplace insert involves more than just selecting the most powerful unit. It’s important to consider your room size, ventilation requirements, and whether you prefer ventless or vented models. Safety features and ease of operation can significantly impact daily use, especially in homes with children or pets. Budget constraints also play a role, but investing a bit more can enhance durability and user experience. Understanding these factors helps you avoid common pitfalls like overestimating heating needs or selecting incompatible installation options.Room Size and Heating Capacity
Matching the BTU rating of your gas insert to your room size ensures effective heating without wasting energy. A unit with too much power can lead to overheating and higher operational costs, while one that’s underpowered won’t warm the space adequately. As a rule of thumb, a 20 BTU per square foot estimate guides your choice, but factors like insulation and ceiling height also matter. Carefully assess your space to select a model that balances efficiency and comfort, rather than just focusing on maximum output.
Vented vs. Ventless Models
Vented inserts require proper chimney or venting, making installation more involved but often resulting in more authentic flames and better air quality. Ventless models, on the other hand, are easier to install and ideal for retrofit situations, but they emit combustion byproducts directly into the room. Safety regulations vary by location, so verify local codes before choosing ventless units. Consider your home’s ventilation system and your comfort level with emissions when making this decision.
Control Options and User Convenience
Remote controls and thermostats can transform the user experience, especially for larger or frequently used units. These features allow you to adjust heat and flame settings from across the room or via smartphone, reducing the need for manual operation. Keep in mind that more advanced controls may add to the initial cost and complexity, but they often improve overall satisfaction and safety. Consider your tech preferences and daily routines when prioritizing control features.
Safety and Maintenance
Safety features such as automatic shutoff, oxygen depletion sensors, and reliable controls are vital for secure operation. Regular maintenance, including cleaning and inspecting vents or burners, extends the lifespan of your insert and maintains efficiency. Ventless models typically require more frequent checks to ensure air quality, while vented units demand proper venting maintenance. Choosing a model with accessible components can make routine upkeep easier and safer over time.
Budget and Long-Term Costs
While cheaper models may seem attractive initially, they can incur higher operational or maintenance costs later. Premium inserts often feature better materials, more efficient burners, and longer warranties, which can save money over their lifespan. Consider the fuel type—natural gas or propane—and the associated cost differences. Investing in a slightly more expensive, high-quality unit can lead to greater comfort and fewer repairs, making it a smarter choice for long-term satisfaction.
Frequently Asked Questions
Are ventless gas fireplace inserts safe to use indoors?
Ventless gas fireplace inserts are designed with safety features like oxygen depletion sensors and automatic shutoff systems. However, they do emit combustion byproducts directly into the living space, which can affect indoor air quality if not properly maintained or used in poorly ventilated rooms. It’s important to adhere to local safety codes and consider installing carbon monoxide detectors when using ventless models. Regular maintenance is essential to ensure safe, efficient operation over time.
How much space can a typical gas fireplace insert heat?
The heating capacity of a gas fireplace insert is primarily measured in BTUs, with most units suitable for rooms ranging from 300 to 1,500 square feet. For larger spaces, higher BTU units or multiple inserts may be necessary. Always match the BTU output to your room size, factoring in insulation and ceiling height, to avoid over- or under-heating. Proper sizing ensures comfort and efficient energy use, preventing unnecessary operational costs.
Do I need professional installation for a gas fireplace insert?
Yes, professional installation is highly recommended for gas fireplace inserts to ensure safety, proper venting, and compliance with local building codes. Incorrect installation can lead to safety hazards, inefficient operation, or damage to your home. Licensed technicians have the expertise to connect gas lines, install vents or ventless systems, and calibrate controls properly. While it may add to your upfront cost, professional installation provides peace of mind and long-term reliability.
Can I install a gas fireplace insert in an existing wood fireplace?
Many gas fireplace inserts are designed for retrofit into existing masonry or prefabricated wood fireplaces. However, compatibility depends on the size, venting options, and local safety regulations. Some inserts require modifications to the existing structure or venting system. Consulting with a professional ensures the insert fits correctly and operates safely, avoiding potential issues like improper venting or insufficient clearance.
What maintenance is required for a gas fireplace insert?
Routine maintenance involves inspecting and cleaning burners, vents, and glass to keep the unit operating efficiently. For vented models, regular chimney or vent cleaning prevents blockages and ensures proper airflow. Ventless units need frequent air quality checks and filter replacements if applicable. Periodic professional service can identify potential problems early, prolong the lifespan of your insert, and maintain safe operation. Following the manufacturer’s maintenance instructions is key to avoiding costly repairs.
Conclusion
Choosing the right gas fireplace insert depends on your specific needs. The best overall pick, the Duluth Forge FNF300R, offers a balanced combination of power, control, and affordability, making it suitable for most homeowners. For those prioritizing budget, the Duluth Forge Liquid Propane Ventless model provides reliable heat at a lower price point. If you’re seeking a premium experience with advanced features, the Duluth Forge Dual Fuel models justify the investment with their versatility and higher BTU ratings. Beginners or those installing in existing fireplaces might favor simple, ventless models, while larger homes benefit from higher BTU units. Tailoring your choice to these factors will ensure a satisfying and safe heating solution.
