11 Best Ventless Gas Fireplace Inserts with Thermostat Control

When it comes to creating a warm, inviting atmosphere without the hassle of a chimney or complicated installation, a Ventless Gas Fireplace Insert is a game-changer.

These modern heating solutions not only deliver efficient warmth but also bring style, convenience, and cost savings to your home.

Perfect for cozy nights and energy-conscious households, ventless gas fireplace inserts with thermostat control allow you to maintain the ideal temperature effortlessly while enjoying the realistic flame ambiance.

In this guide, we’ve rounded up the 11 best ventless gas fireplace inserts that combine sleek design, powerful heat output, and smart features—so you can find the perfect fit for your living room, bedroom, or even a cabin retreat.

Whether you’re upgrading an existing fireplace or adding a new focal point to your space, these options will keep you comfortable, stylish, and in control.

What to Look for in a Ventless Gas Fireplace Insert

  • Match the heating capacity (BTU output) to your room size for efficient warmth without overheating
  • Choose a model with built-in thermostat control for precise temperature regulation and energy efficiency
  • Select between natural gas or propane based on availability and cost-effectiveness in your area
  • Pick a design with realistic flame effects, log sets, and finishes that enhance your home décor
  • Ensure it includes safety features like an oxygen depletion sensor (ODS) and automatic shut-off
  • Look for easy, no-vent installation options to simplify setup in existing fireplaces or wall spaces

2025 Best Ventless Gas Fireplace Insert

  1. Duluth Forge Ventless Gas Fireplace Insert with Remote Control
  2. Duluth Forge Dual Fuel Ventless Gas Fireplace System with Remote Control
  3. Duluth Forge Ventless Stainless Gas Fireplace Insert with Reflective Crystal Glass Media
  4. Duluth Forge Dual Fuel Ventless Gas Fireplace with Thermostat Control
  5. Comfort Glow Ventless Natural Gas and Liquid Propane Fireplace Insert with Adjustable Thermostat
  6. Empire Comfort Systems 36″ Deluxe Vent-Free Firebox with Flush Face Refractory Liner
  7. ProCom 36″ Universal Ventless Firebox Insert with Zero Clearance Design
  8. HearthSense Propane Gas Ventless Gas Fireplace Insert with Remote Control
  9. ProCom Dual Fuel Energy Efficient Ventless Gas Fireplace Insert with Thermostat
  10. ProCom Natural Gas Vent-Free Fireplace Insert with Millivolt Control
  11. Duluth Forge Natural Gas and Liquid Propane Ventless Gas Fireplace Remote Control

1. Duluth Forge Ventless Gas Fireplace Insert with Remote Control

The Duluth Forge Ventless Gas Fireplace Insert with Remote Control is a versatile, energy-efficient heating solution designed to keep your home cozy and stylish all year round.

Delivering an impressive 26,000 BTUs, it can warm up to 1,350 square feet, making it ideal for living rooms, dens, or open-plan areas. Crafted with hand-painted concrete logs molded from real wood, it offers a remarkably realistic and high-end appearance.

Duluth Forge DLS-30R-1 Dual Fuel Ventless Fireplace Logs Set with Remote Control, Use with Natural Gas or Liquid Propane, 33000 BTU, Split Red Oak, 30 Inches
VFL24T Dual Fuel Ventless Fireplace Logs Set with Thermostat, Use with Natural Gas or Liquid Propane, 32000 BTU, Heats up to 1100 Sq. Ft, Brown, 24 Inches, Brown
Skyflame 8 Small Piece Set of Ceramic Wood Logs and Accessories for All Types of Indoor Gas Inserts, Ventless & Vent Free, Propane, Gel, Ethanol, Electric or Outdoor Fireplaces & Fire Pits
Duluth Forge DLS-30R-1 Dual Fuel Ventless Fireplace Logs Set with Remote Control, Use with Natural Gas or Liquid Propane, 33000 BTU, Split Red Oak, 30 Inches
VFL24T Dual Fuel Ventless Fireplace Logs Set with Thermostat, Use with Natural Gas or Liquid Propane, 32000 BTU, Heats up to 1100 Sq. Ft, Brown, 24 Inches, Brown
Skyflame 8 Small Piece Set of Ceramic Wood Logs and Accessories for All Types of Indoor Gas Inserts, Ventless & Vent Free, Propane, Gel, Ethanol, Electric or Outdoor Fireplaces & Fire Pits
Amazon Prime
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Amazon Prime
Duluth Forge DLS-30R-1 Dual Fuel Ventless Fireplace Logs Set with Remote Control, Use with Natural Gas or Liquid Propane, 33000 BTU, Split Red Oak, 30 Inches
Duluth Forge DLS-30R-1 Dual Fuel Ventless Fireplace Logs Set with Remote Control, Use with Natural Gas or Liquid Propane, 33000 BTU, Split Red Oak, 30 Inches
Amazon Prime
VFL24T Dual Fuel Ventless Fireplace Logs Set with Thermostat, Use with Natural Gas or Liquid Propane, 32000 BTU, Heats up to 1100 Sq. Ft, Brown, 24 Inches, Brown
VFL24T Dual Fuel Ventless Fireplace Logs Set with Thermostat, Use with Natural Gas or Liquid Propane, 32000 BTU, Heats up to 1100 Sq. Ft, Brown, 24 Inches, Brown
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Skyflame 8 Small Piece Set of Ceramic Wood Logs and Accessories for All Types of Indoor Gas Inserts, Ventless & Vent Free, Propane, Gel, Ethanol, Electric or Outdoor Fireplaces & Fire Pits
Skyflame 8 Small Piece Set of Ceramic Wood Logs and Accessories for All Types of Indoor Gas Inserts, Ventless & Vent Free, Propane, Gel, Ethanol, Electric or Outdoor Fireplaces & Fire Pits
Amazon Prime

This zero-clearance, vent-free gas fireplace insert works with either liquid propane or natural gas and features a user-friendly Piezo ignition system for hassle-free startup.

With the included remote control, you can easily adjust the temperature for optimal comfort. Safety is a top priority, thanks to the built-in Oxygen Depletion Sensor (O.D.S.), which automatically shuts the unit off if low oxygen or carbon monoxide levels are detected.

At 99.9% efficiency, this ventless indoor gas fireplace insert delivers warmth without the need for outside ducts, making it both practical and cost-effective.

  • 26,000 BTUs, heats up to 1,350 sq. ft.
  • Works with liquid propane or natural gas
  • Hand-painted logs with realistic detailing
  • Remote control for effortless heat adjustment
  • Oxygen Depletion Sensor for enhanced safety
  • 99.9% energy efficiency with no outside venting required
ProsCons
High heating capacityNot suitable for outdoor use
Realistic, hand-painted log designRequires fuel connection installation
Dual-fuel capability (LP or NG)May not fit all fireplace openings
Remote control convenienceHeat output may be excessive for very small rooms
Built-in safety shut-offProfessional installation recommended

I personally prefer this product because it offers the perfect balance of style, efficiency, and safety. The realistic log design adds a touch of elegance to any room, while the high BTU output ensures dependable warmth during colder months.

I appreciate that it works with both propane and natural gas, giving flexibility for different setups. The remote control makes it easy to fine-tune the temperature without leaving the comfort of the couch, and knowing it has advanced safety features brings peace of mind.

For me, it’s a smart choice for reliable, efficient, and attractive home heating.

2. Duluth Forge Dual Fuel Ventless Gas Fireplace System with Remote Control

The Duluth Forge Dual Fuel Ventless Gas Fireplace System with Remote Control is a premium heating solution that combines elegance, efficiency, and versatility.

Featuring patented dual-fuel technology, it operates with either natural gas or liquid propane, delivering an impressive 32,000 BTUs to warm spaces up to 1,500 square feet.

This vent-free gas fireplace insert eliminates the need for outside ducts or chimneys, ensuring 99.9% heating efficiency. The set includes six hand-painted ceramic fiber logs with realistic detailing, complemented by a furniture-grade mantle with light distressing, burnished edges, and double doors for a classic touch.

Ninja Air Fryer Pro 4-in-1 with 5 QT Capacity, Air Fry, Roast, Reheat, Dehydrate, Air Crisp Technology with 400F for hot, 120 Volts, Nonstick Basket & Crisper Plate, Grey, AF141
Ninja BN701 Professional Plus Blender, 1400 Peak Watts, 3 Functions for Smoothies, Frozen Drinks & Ice Cream with Auto IQ, 72-oz.* Total Crushing Pitcher & Lid, Dark Grey
AROMA Digital Rice Cooker, 4-Cup (Uncooked) / 8-Cup (Cooked), Steamer, Grain Cooker, Multicooker, 2 Qt, Stainless Steel Exterior, ARC-914SBD
Ninja Air Fryer Pro 4-in-1 with 5 QT Capacity, Air Fry, Roast, Reheat, Dehydrate, Air Crisp Technology with 400F for hot, 120 Volts, Nonstick Basket & Crisper Plate, Grey, AF141
Ninja BN701 Professional Plus Blender, 1400 Peak Watts, 3 Functions for Smoothies, Frozen Drinks & Ice Cream with Auto IQ, 72-oz.* Total Crushing Pitcher & Lid, Dark Grey
AROMA Digital Rice Cooker, 4-Cup (Uncooked) / 8-Cup (Cooked), Steamer, Grain Cooker, Multicooker, 2 Qt, Stainless Steel Exterior, ARC-914SBD
Ninja Air Fryer Pro 4-in-1 with 5 QT Capacity, Air Fry, Roast, Reheat, Dehydrate, Air Crisp Technology with 400F for hot, 120 Volts, Nonstick Basket & Crisper Plate, Grey, AF141
Ninja Air Fryer Pro 4-in-1 with 5 QT Capacity, Air Fry, Roast, Reheat, Dehydrate, Air Crisp Technology with 400F for hot, 120 Volts, Nonstick Basket & Crisper Plate, Grey, AF141
Ninja BN701 Professional Plus Blender, 1400 Peak Watts, 3 Functions for Smoothies, Frozen Drinks & Ice Cream with Auto IQ, 72-oz.* Total Crushing Pitcher & Lid, Dark Grey
Ninja BN701 Professional Plus Blender, 1400 Peak Watts, 3 Functions for Smoothies, Frozen Drinks & Ice Cream with Auto IQ, 72-oz.* Total Crushing Pitcher & Lid, Dark Grey
AROMA Digital Rice Cooker, 4-Cup (Uncooked) / 8-Cup (Cooked), Steamer, Grain Cooker, Multicooker, 2 Qt, Stainless Steel Exterior, ARC-914SBD
AROMA Digital Rice Cooker, 4-Cup (Uncooked) / 8-Cup (Cooked), Steamer, Grain Cooker, Multicooker, 2 Qt, Stainless Steel Exterior, ARC-914SBD

The built-in sprayed brick liner enhances the authentic fireplace appearance. With the included remote control, users can switch between manual and thermostat modes for personalized comfort.

Safety is paramount, with a battery-assisted Piezo ignition and an Oxygen Depletion Sensor (ODS) that automatically shuts off the unit if unsafe air quality is detected.

Designed as a zero-clearance gas fireplace insert, it fits seamlessly into indoor living spaces for both warmth and style.

  • Dual-fuel technology: works with natural gas or propane
    32,000 BTUs heats up to 1,500 sq. ft.
    99.9% energy efficiency, no outside venting required
    Six realistic hand-painted ceramic fiber logs
    Remote control with LCD screen and thermostat mode
    Built-in Oxygen Depletion Sensor for safety
ProsCons
Dual-fuel capability for flexibilityRequires fuel source setup
High heating capacityNot designed for small rooms
Stylish mantle and brick liner designProfessional installation recommended
Remote control with thermostat functionMantle adds to overall space requirements
Advanced safety featuresClearance requirements must be met

I personally prefer this product because it combines the charm of a traditional fireplace with the practicality of modern heating technology.

The dual-fuel capability offers flexibility for different home setups, and the high BTU output ensures reliable warmth for larger spaces. I like that the design includes a beautiful mantle, realistic logs, and a brick liner for a genuine fireplace feel.

The remote control with thermostat mode makes it easy to maintain a comfortable temperature, while the built-in safety features provide added peace of mind. For me, it’s an ideal blend of performance, style, and efficiency.

3. Duluth Forge Ventless Stainless Gas Fireplace Insert with Reflective Crystal Glass Media

The Duluth Forge Ventless Stainless Gas Fireplace Insert with Reflective Crystal Glass Media offers a sleek, modern approach to home heating, combining style, efficiency, and durability.

Proudly assembled in the USA using high-quality materials and advanced manufacturing techniques, this zero-clearance vent-free gas fireplace insert delivers 24,000 BTUs of warmth to create a cozy, inviting atmosphere.

Powered by a 304-grade stainless steel H-Burner, it comes factory-configured for natural gas but includes a conversion kit for liquid propane, making it a versatile heating option.

The included premium reflective crystal fire glass enhances the large, captivating flame display, while the slim firebox design saves valuable living space. Easy to operate with a manual on/off control valve and a battery-assisted Piezo ignition, it also features a drain tray to manage moisture beneath the firebox.

Ideal for those who value both performance and aesthetics, this ventless indoor gas fireplace insert is an energy-efficient and stylish addition to any home.

  • 24,000 BTUs heats efficiently in various room sizes
  • 304-grade stainless steel H-Burner for durability
  • Works with natural gas or propane (conversion kit included)
  • Premium reflective crystal fire glass for a striking flame display
  • Slim-profile firebox saves living space
  • Assembled in the USA with quality materials
ProsCons
Stylish modern design with reflective crystal glassManual ignition, no remote control
Durable stainless steel constructionHeat output may be high for very small rooms
Dual-fuel capabilityRequires fuel connection setup
Slim-profile firebox for space efficiencyNo thermostat control feature
High-quality USA assemblyProfessional installation recommended

I personally prefer this product because it combines contemporary elegance with reliable heating performance. The reflective crystal fire glass creates a truly stunning focal point, adding both warmth and ambiance to a room.

I like that it’s built with durable stainless steel and assembled in the USA, which speaks to quality and longevity. The slim firebox design is perfect for maximizing space without sacrificing style, and the ability to switch between natural gas and propane provides flexibility for different setups.

For me, it’s a great choice when both aesthetics and efficiency matter.

4. Duluth Forge Dual Fuel Ventless Gas Fireplace with Thermostat Control

The Duluth Forge Dual Fuel Ventless Gas Fireplace with Thermostat Control is a premium heating solution that combines elegant design with advanced functionality.

Featuring patented dual fuel technology, this zero-clearance gas fireplace insert can operate with either natural gas or liquid propane, delivering up to 26,000 BTUs of warmth to efficiently heat spaces up to 1,350 sq. ft. without the need for a chimney or outside duct.

Its built-in thermostat control automatically adjusts the flame to maintain your desired room temperature, ensuring energy-efficient and consistent heat.

Designed with 5 hand-painted ceramic fiber logs, a furniture-grade mantle with light distressing, and a single mesh screen, it brings a cozy, authentic fireplace ambiance to any indoor space.

Safety is a priority, with a battery-assisted Piezo ignition system and an oxygen depletion sensor that shuts off the unit if unsafe conditions are detected. Measuring 14.5″ H x 40″ W x 40″ D and weighing 125 lbs, this ventless indoor gas fireplace insert blends style, safety, and superior heating performance.

  • Dual fuel technology supports natural gas or propane use
  • 26,000 BTUs efficiently heat up to 1,350 sq. ft.
  • Built-in thermostat for automatic temperature control
  • Hand-painted ceramic fiber logs for realistic appearance
  • Oxygen depletion sensor for enhanced safety
ProsCons
Dual fuel capability for flexible installationRequires minimum clearance from ceiling
High heating efficiency at 99.9%Heavy unit at 125 lbs
No chimney or duct requiredLimited to indoor use only
Stylish, furniture-grade mantle with realistic logsProfessional installation recommended for safety
Built-in ODS and Piezo ignition for safetyMantle design may not fit all décor styles

I prefer this ventless gas fireplace insert because it offers a perfect blend of style, efficiency, and safety. The dual fuel feature gives flexibility in choosing between propane and natural gas, while the thermostat control ensures consistent comfort without constant adjustments.

The realistic logs and elegant mantle make it a beautiful focal point in any room, and the built-in safety features provide peace of mind. It’s an ideal choice for creating a warm, inviting atmosphere while maximizing heating efficiency.

5. Comfort Glow Ventless Natural Gas and Liquid Propane Fireplace Insert with Adjustable Thermostat

The Comfort Glow Ventless Natural Gas and Liquid Propane Fireplace Insert with Adjustable Thermostat is a versatile and stylish heating solution designed to bring warmth and elegance to any indoor space.

Featuring a powerful 26,000 BTU output, this energy-efficient gas fireplace insert can heat up to 950 sq. ft. with ease.

Its dual fuel capability allows it to operate on either liquid propane or natural gas, offering flexibility for different home setups, while its 99.9% efficient burner system requires no electricity, making it perfect for reliable heating during power outages.

The included Pewter Oak-finished mantel adds a rich, classic touch, complementing the ventless indoor gas fireplace’s realistic appearance. With an adjustable thermostat, users can easily maintain their preferred temperature, while the electric igniter and one-button control ensure simple, hassle-free operation.

Designed for easy assembly and offering the option to add a blower for improved heat circulation, this zero-clearance gas fireplace insert delivers both functionality and refined style to any room.

  • 26,000 BTU heating capacity for up to 950 sq. ft.
  • Dual fuel design for natural gas or propane use
  • Elegant Pewter Oak-finished mantel included
  • Adjustable thermostat for customizable comfort
  • No chimney or electricity required for operation
ProsCons
Dual fuel capability for flexible installationOptional blower sold separately
High 99.9% heating efficiencyLimited to indoor use only
Classic mantel design enhances décorRequires assembly before use
No chimney needed for easy setupNot suitable for extremely large spaces
Simple ignition and one-button controlMantel style may not suit modern interiors

I prefer this ventless gas fireplace insert because it offers the perfect mix of heating efficiency, classic design, and user-friendly features.

The dual fuel option gives flexibility for installation, and the included Pewter Oak mantel makes it an instant centerpiece in any room.

I also appreciate that it operates without electricity, ensuring reliable warmth even during power outages.

The adjustable thermostat adds convenience, making it easy to keep the room at just the right temperature while enjoying a cozy, inviting atmosphere.

6. Empire Comfort Systems 36″ Deluxe Vent-Free Firebox with Flush Face Refractory Liner

The Empire Comfort Systems 36″ Deluxe Vent-Free Firebox with Flush Face Refractory Liner offers a premium foundation for creating a customized, energy-efficient indoor gas fireplace.

Designed for both style and performance, this zero-clearance ventless gas fireplace insert delivers flexibility for installations where traditional venting isn’t possible.

Its fully customizable design allows homeowners to choose from various liners, doors, louvers, frames, and mantels to perfectly match their décor.

The included flush face refractory liner enhances the realistic look of the firebox, while the hem-bent seams provide a superior seal, reducing the need for excessive screws and fasteners for a cleaner, more streamlined finish.

Compatible with certified vent-free burners and log sets (sold separately), this 36-inch vent-free firebox combines efficiency, aesthetics, and versatility for a truly tailored fireplace experience.

  • Vent-free design for flexible installation without chimney
  • Fully customizable with liner, door, louver, frame, and mantel options
  • Hem-bent seams for a cleaner, stronger seal
  • Includes flush face refractory liner for realistic fireplace appearance
  • Compatible with certified vent-free burners and log sets (sold separately)
ProsCons
Vent-free design allows installation in more locationsBurner and log set sold separately
Fully customizable for a personalized lookRequires additional purchases for complete setup
Energy-efficient operationNo built-in thermostat or remote included
Hem-bent seams reduce hardware and improve appearanceProfessional installation recommended
Flush face refractory liner adds realismNo heat output without compatible burner system

I prefer this ventless gas fireplace insert because it offers unmatched customization, letting me choose the exact look and style I want for my indoor space.

The vent-free design makes installation much more flexible, and the flush face refractory liner gives it a polished, realistic appearance. I also appreciate the quality of the hem-bent seams, which create a clean finish without excessive hardware.

It’s an excellent choice for building a tailored, efficient, and stylish fireplace centerpiece.

7. ProCom 36″ Universal Ventless Firebox Insert with Zero Clearance Design

The ProCom 36″ Universal Ventless Firebox Insert with Zero Clearance Design is a versatile and stylish heating solution built for efficiency, safety, and ease of installation.

Proudly assembled in the USA using high-quality materials and advanced manufacturing processes, this vent-free gas fireplace insert is designed with a unique Airflow Technology System that delivers superior heat distribution.

Compatible with most 18”, 24”, or 30” ventless gas log sets, it offers flexibility to suit different styles and heating needs. Its zero-clearance design allows it to be installed directly against or recessed into any wall with gas line access, making it ideal for both new construction and remodels.

The decorative sprayed brick liner and extra-large viewing area create a warm, inviting focal point in any living space. Complete with a draw screen and hood, this energy-efficient gas fireplace insert blends performance with timeless design.

  • Zero-clearance design for flexible installation
  • Works with most 18”, 24”, or 30” ventless gas log sets
  • Unique Airflow Technology System for optimal heat flow
  • Decorative sprayed brick liner with large viewing area
  • Assembled in the USA with high-quality materials
  • Includes draw screen and hood for added style and function
ProsCons
Flexible compatibility with multiple log set sizesRequires separate purchase of gas log set
Zero-clearance design for easy placementNo built-in remote or thermostat control
Decorative brick liner enhances aestheticsProfessional installation recommended
Extra-large viewing area for better flame visibilityLimited to indoor installation
Assembled in the USA for quality assuranceRequires access to a gas line

I personally prefer this product because it offers exceptional flexibility and design appeal. The zero-clearance construction makes it adaptable for a variety of spaces, while the large viewing area and brick liner add warmth and charm to a room’s atmosphere.

I like that it’s compatible with different sizes of ventless gas log sets, allowing for customization based on personal style. The fact that it’s assembled in the USA using quality materials gives confidence in its durability and performance.

For me, it’s an ideal choice for creating a beautiful, efficient, and adaptable fireplace setup.

8. HearthSense Propane Gas Ventless Gas Fireplace Insert with Remote Control

The HearthSense Propane Gas Ventless Gas Fireplace Insert combines elegant design, powerful heating, and modern convenience to create a cozy atmosphere in any home.

With its efficient ventless technology, this zero-clearance gas fireplace insert delivers 20,000 BTUs of warmth, heating spaces up to 950 sq. ft. without the need for a chimney or ductwork.

The stylish arch design, mesh screen, and six hand-painted ceramic fiber logs give it a realistic and timeless appeal, perfect for enhancing any décor.

Its user-friendly remote control allows you to adjust heat settings and power on or off with ease, while built-in safety features like the oxygen depletion sensor ensure safe indoor use.

Designed for both propane and natural gas setups, this energy-efficient gas fireplace insert offers the perfect blend of comfort, style, and reliability.

  • 20,000 BTU output for spaces up to 950 sq. ft.
  • 99.9% energy-efficient vent-free heating
  • Zero-clearance design for custom installations
  • Six realistic hand-painted ceramic fiber logs
  • Remote control with temperature adjustment
  • Built-in oxygen depletion sensor for safety
ProsCons
High heat output for medium to large roomsRequires minimum clearance from ceiling
99.9% energy efficiency, saving on fuel costsWeighs 77.2 lbs., making installation heavier
Stylish design with realistic ceramic logsRemote control battery requires replacement over time
No chimney or ductwork neededLimited to indoor use only
Easy operation via remote controlMust meet clearance safety requirements

I prefer this ventless gas fireplace insert because it delivers the perfect combination of style, efficiency, and convenience.

The realistic ceramic logs and elegant arch design give any room a warm, inviting look, while the powerful heat output ensures comfort during colder months.

The remote control adds modern ease, and knowing it has built-in safety features offers extra peace of mind. It’s a great choice for anyone wanting an energy-efficient, low-maintenance heating solution without sacrificing aesthetics.

9. ProCom Dual Fuel Energy Efficient Ventless Gas Fireplace Insert with Thermostat

The ProCom Dual Fuel Energy Efficient Ventless Gas Fireplace Insert delivers the perfect balance of versatility, performance, and style. Featuring patented dual fuel technology, this zero-clearance gas fireplace insert can operate on either natural gas or liquid propane, making it adaptable to various home setups.

With a 10,000 BTU output and 99.9% energy efficiency, it efficiently heats spaces up to 500 sq. ft. without requiring a chimney or ductwork. The thermostat control ensures consistent comfort by automatically cycling the heat on and off to maintain your desired temperature.

Four hand-painted ceramic fiber logs paired with a mesh screen create a realistic and inviting fireplace look, enhancing any living space. Built-in safety features like the oxygen depletion sensor provide peace of mind, while the compact dimensions make it an excellent choice for smaller to mid-sized rooms.

  • Dual fuel technology for natural gas or propane use
  • 10,000 BTU heating capacity for up to 500 sq. ft.
  • 99.9% energy-efficient vent-free operation
  • Thermostat control for automatic temperature regulation
  • Four realistic ceramic fiber logs with mesh screen
  • Safety oxygen depletion sensor for indoor protection
ProsCons
Dual fuel capability for flexibilityLower BTU output compared to larger models
High energy efficiency saves fuel costsLimited heating area (500 sq. ft.)
Compact zero-clearance design fits smaller spacesRequires minimum clearance from ceiling
Realistic ceramic logs enhance visual appealNo remote control included
Built-in thermostat for automatic comfortIndoor use only

I prefer this ventless gas fireplace insert because it offers exceptional versatility with its dual fuel technology, allowing it to work seamlessly with either propane or natural gas.

The thermostat control makes it easy to maintain a comfortable temperature without constant adjustments, and its compact design fits perfectly in smaller rooms while still delivering efficient, cozy warmth.

The combination of realistic ceramic logs, stylish mesh screen, and energy-saving performance makes it a smart and attractive heating solution.

10. ProCom Natural Gas Vent-Free Fireplace Insert with Millivolt Control

The ProCom Natural Gas Vent-Free Fireplace Insert offers a powerful and stylish heating solution for any indoor space.

Featuring advanced ventless technology, this zero-clearance gas fireplace insert delivers an impressive 20,000 BTUs of heat—enough to warm up to 950 sq. ft.—without requiring a chimney or ductwork.

With 99.9% energy efficiency, it maximizes warmth while minimizing fuel usage. The included remote control with LCD screen allows for easy operation, letting users adjust temperature settings or switch the unit on and off from across the room.

Its elegant arch design, mesh screen, and six hand-painted ceramic fiber logs create a realistic, inviting fireplace ambiance. Designed for custom built-in installations, it combines function, beauty, and safety with features like an oxygen depletion sensor and Piezo ignition for worry-free use.

  • 20,000 BTU output heats up to 950 sq. ft.
  • 99.9% energy-efficient ventless operation
  • Remote control with LCD screen for easy adjustments
  • Six hand-painted ceramic fiber logs with mesh screen
  • Zero-clearance design for custom installations
  • Built-in oxygen depletion sensor for safety
ProsCons
High heat capacity for larger roomsRequires minimum clearance from ceiling
Remote control with temperature settingsHeavier unit at 77.2 lbs.
Elegant design with realistic logsLimited to natural gas only
99.9% energy efficiency for cost savingsIndoor use only
No chimney or ductwork neededRemote control battery replacement needed over time

I prefer this ventless gas fireplace insert because it delivers both high performance and timeless style. Its powerful 20,000 BTU heat output can warm a large space efficiently, while the realistic ceramic logs and decorative arch design add charm to any room.

The convenience of a remote control and the peace of mind provided by built-in safety features make it a practical yet attractive choice for anyone wanting a low-maintenance, energy-efficient heating solution.

11. Duluth Forge Natural Gas and Liquid Propane Ventless Gas Fireplace Remote Control

The Duluth Forge Natural Gas and Liquid Propane Ventless Gas Fireplace combines exceptional heating power, versatile fuel options, and refined design for the ultimate indoor comfort.

Using patented dual fuel technology, this zero-clearance gas fireplace insert can operate on either natural gas or liquid propane, producing an impressive 32,000 BTUs of heat—enough to warm spaces up to 1,500 sq. ft. with 99.9% energy efficiency.

Its remote control with LCD screen allows for both manual and thermostat operation, ensuring personalized comfort at the touch of a button.

The elegant furniture-grade mantle with light distressing, double doors, and a sprayed brick liner enhances any living space, while six hand-painted ceramic fiber logs deliver a realistic flame presentation.

Built-in safety features like the oxygen depletion sensor provide peace of mind, making this vent-free gas fireplace insert as safe as it is stylish.

  • Dual fuel technology for natural gas or propane use
  • 32,000 BTU output heats up to 1,500 sq. ft.
  • 99.9% energy-efficient ventless operation
  • Remote control with manual and thermostat settings
  • Six realistic ceramic fiber logs with furniture-grade mantle
  • Built-in oxygen depletion sensor for added safety
ProsCons
High BTU capacity for large spacesRequires minimum clearance from ceiling
Dual fuel capability for flexibilityLarge dimensions require more floor space
Elegant mantle and realistic logs for visual appealHeavier unit, making installation more involved
Remote control with thermostat modeIndoor use only
No chimney or ductwork neededRemote control battery replacement needed over time

I prefer this ventless gas fireplace insert because it combines impressive heating power with a refined, furniture-like appearance that becomes the focal point of any room.

The dual fuel technology offers flexibility for different home setups, while the thermostat function ensures consistent comfort without constant adjustments.

The combination of high efficiency, elegant design, and built-in safety features makes it a perfect choice for anyone looking to add both warmth and style to their living space.

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FAQs

How does a ventless gas fireplace insert work?

It works by burning gas cleanly enough that the byproducts are minimal and safe for indoor use when installed correctly. Heat and combustion gases stay inside the room, making it highly energy-efficient.

Are ventless gas fireplace inserts safe?

Yes, when installed and used according to manufacturer guidelines. Most models include an oxygen depletion sensor (ODS) that automatically shuts the unit off if oxygen levels drop too low.

Do ventless gas fireplace inserts need a chimney?

No, ventless gas fireplace inserts are designed for indoor use without a chimney or ductwork, making installation simpler and more affordable.

What size room can a ventless gas fireplace insert heat?

Depending on the BTU rating, a ventless gas fireplace insert can heat spaces from about 300 sq. ft. to over 1,500 sq. ft. Always check the product’s heating capacity to match your room size.

Can a ventless gas fireplace insert use both propane and natural gas?

Some models feature dual fuel technology, allowing them to run on either propane or natural gas. Others are designed for one specific fuel type only.

How energy-efficient is a ventless gas fireplace insert?

Most ventless gas fireplace inserts are 99% or more energy efficient because they release nearly all the heat they produce directly into the room instead of venting it outside.

Do ventless gas fireplace inserts require electricity?

Many models operate without electricity, making them ideal for heating during power outages. Some units may use batteries or an adapter for features like remote control.

How do you maintain a ventless gas fireplace insert?

Regular maintenance includes cleaning the logs, checking for dust in the burner ports, ensuring the ODS is functioning, and having periodic professional inspections for safe operation.

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