Best Ventless Gas Fireplaces of 2020 – Ultimate Guide

| Last Updated: April 19, 2021

Ventless gas fireplaces are a cheaper and more energy-efficient means of keeping your room warm. 

If you are looking for the right one for your home, you should definitely read on. 

In this article, we have rounded up all the best ventless gas fireplaces, so let’s get started!

Our Top Picks for Ventless Gas Fireplaces

  • High heat output
  • High efficiency
  • Safe to use indoors
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  • Dual heating systems
  • High heat output
  • Strong and durable
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  • Best for the Money
  • Dual fuel system
  • better heat distribution
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Comparison of the Best Ventless Gas Fireplaces

  • High heat output of up to 25,000 BTUs
  • Comes with up to 99 percent efficiency
  • Equipped with a built-in pilot Oxygen depletion sensor
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  • Can be used with both Butane and natural gas
  • Up to 26,000 BTU heat output for better heat efficiency
  • Made strong and durable to last
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  • Best for the Money
  • Uses both natural gas as well as butane
  • Dual burners used for better heat distribution
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  • Best Free Standing Ventless Gas Fireplace
  • Will quickly and easily heat a space of up to 1,000 square feet
  • Heat output of up to 30,000 BTUs
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  • Best Corner Ventless Gas Fireplace
  • Quickly heats up to the maximum output capacity
  • Very easy to assemble and install
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  • Best Ventless Natural Gas Fireplace
  • Uses ceramic logs for durability and longevity
  • A heavy-duty burner included for better heat retention
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What is a Ventless Gas Fireplace?

Ventless fireplaces are indoor fireplace pipes fueled by gas, such as propane. They depend on indoor air to burn and warm up. They also tend to exhaust a low level of gases in the room or area, and there is no need for a chimney and/or flue. 

In order to install a ventless gas fireplace, you must hire a professional so that there is no danger to you or your family. They are designed to burn cleanly without the use of an exhaust. The installation and costs of a ventless gas fireplace are relatively cheaper than normal fireplaces.

What is a Ventless Gas Fireplace Insert?

A ventless gas fireplace insert is essentially a firebox where you can add the artificial logs for the fire.

ProCom Dual Fuel Stove QNSD250T

How Does a Ventless Gas Fireplace Work?

Located in a combustive firebox, a ventless gas fireplace comes with its own control panel, which has valves for controlling the pilot line as well as for igniting the flame for warmth, just like the kind of striker that you find on barbecue grills or water heaters. There are also holes in the artificial logs and pins to keep them placed in one position precisely.

Instead of venting the combustible gas outside through the usage of a chimney or flue, a ventless gas fireplace transfers the gases back inside the room. The gas travels in a U-shaped path where the oxygen enters the fireplace's bottom from the room and then eventually vents back inside the room from the top.

What Size Ventless Gas Fireplace Do I Need?

It is extremely necessary to get the right size of the ventless fireplace for the room. For a spacious and large room, there should be a ventless gas fireplace that has an output of about 25,000 BTU or higher, which is similar to the output you would get from a vented gas fireplace.

For rooms that are small in sizes, such as a small bedroom or washroom, ventless gas fireplaces are reduced in output size to 5,000 BTUs. In order to get optimal control over the heat production, these units can be synchronized with the help of remote control or a thermostat fitted to the wall.

Quick Take: Best Ventless Gas Fireplaces

These are our recommendations for the best ventless gas fireplaces:

  1. ProCom Dual Fuel Stove QNSD250T
  2. Duluth Forge FDF300T
  3. Pleasant Hearth VFS2-PH20DT

Review of the Best Ventless Gas Fireplaces

Now that you know what a ventless gas fireplace is and how you can choose one, let’s have a look at some of the best models available. 

ProCom Ventless Dual Fuel Stove-25,000 BTU, Thermostatic Control Model QNSD250T, 25, black


  • Safe and friendly to use
  • Heats up to 1100 square feet
  • Ideal for larger rooms for great airflow
  • 99.9% energy-efficient fireplace which is economical
  • Comes with a built-in thermostat to offer various temperatures


  • Large in size so it might not fit in small homes

What Recent Buyers Report

Most consumers of this fireplace were heavily impressed by how safe and easy it was to use. Not only is it powerful and heavy-duty, but it also aims to reduce costs and save energy by 99.9%, which means that it is super feasible and economical to use all winter long without any worries.

Why it Stands Out to Us

Since the product contains all the features you would want in a ventless gas fireplace, it is coined to be the best overall. It can heat up to 1100 square feet, which means that you can place it in the largest room and still expect it to be warmed within minutes.

Moreover, it has a heat output of about 25,000 BTU, which can either be powered by natural gas or liquid propane, which is super impressive and highly efficient. It also comes equipped with an oxygen depletion sensor or ODS, which helps determine any carbon monoxide traces and keeps you safe.

Bottom Line

If you are looking for the best natural gas-fueled ventless fireplace, it doesn’t get any better than this one. With its energy-saving and environment-friendly design, it will outperform any gas fireplace in your home.

Duluth Forge FDF300T Dual Fuel Ventless Gas Fireplace-26,000 BTU, T-Stat Control, Apple Spice (Light)


  • 99.9 percent energy efficient 
  • Features an Oxygen Depletion Sensor (ODS)
  • Comes with five hand-painted fiber ceramic logs
  • Auto-shuts down the fireplace if any traces of harmful gas is exposed
  • Thermostat control which changes temperatures to the desired levels


  • Some users had trouble lighting the pilot

What Recent Buyers Report

While some users had trouble lighting the pilot, others couldn’t deny its impressive performance and high-quality design. The thermostat control feature adds an element of convenience to the product, while the system itself is 99.9% energy-efficient and environment-friendly. Overall, this is a spectacular ventless fireplace.

Why it Stands Out to Us

Designed to fit into any old fireplace area in your home, this ventless fireplace is fit for any kind of house. It’s fueled by either liquid propane or natural gas and is 99.9% energy-efficient. It can exude about 26,000 BTUs of heat, which is more than enough to provide heating for the entire house.

It also comes with a remote control to change the temperature, an oxygen depletion sensor with an automatic shut-off feature, and a piezo ignition which is powered by batteries. This high-quality fireplace allows you to stay warm and toasty during the coldest of nights.

Bottom Line

On the hunt for an aesthetically-pleasing as well as a high-quality ventless fireplace? This one by Duluth is not going to let you down. With its impeccable system and high regard for safety and energy efficiency, it truly is a star.

Best for the Money:
Pleasant Hearth VFS2-PH20DT

Pleasant Hearth VFS2-PH20DT 20,000 BTU 23.5 in. Compact Gas vent free stove


  • Adds a retro and vintage look to your home
  • Flames are thicker and fuller for added heat
  • Minimalistic and simple design allows ease of installation
  • Thermostat control knob maintains the ideal heat level automatically
  • Comes with a two-stage adjustable regulator for temperature control


  • Some users hear sputtering sounds from the fireplace, which can be loud

What Recent Buyers Report

This stove may be small, but it is packed with power and performance. It comes with the highest quality features and produces a thick flame that easily warms up the entire house in a short span of time. It is also super easy to assemble and install because of its simple design and small size.

Why it Stands Out to Us

Affordable and simple to use, this ventless fireplace is fit for a small house and is ideal for those looking for a budget-friendly option. It’s fueled by either liquid propane or natural gas, as it is a dual burner. It can radiate about 20,000 BTUs of heat, which is ideal for a 700 square foot space.

It also comes with a thermostat that automatically controls the temperature, and it can also be paired with a variable-speed blower that is sold separately for even heat distribution across the room. For a simpler and more efficient heating system, this unit by Pleasant Hearth is highly ideal.

Bottom Line

High prices and large sizes can be a cause of concern for smaller spaces and homes, which is why this simple and easy-to-assemble fireplace is here to save the day. For a more budget-friendly option, do check this one out!

Best Free-Standing Ventless Gas Fireplace:
Pleasant Hearth VFS2-PH30DT

Pleasant Hearth VFS2-PH30DT 30,000 BTU 32-Inch Intermediate Gas vent free stove, Black


  • Covers about 1000 square feet
  • Aesthetically pleasing to look at
  • Flames are thicker and fuller for better warmth
  • Designed with cold-rolled steel to protect the hands
  • Built-in thermostat control knob for automatic controlling of the temperature


  • Some users had an issue with lighting the pilot initiator 

What Recent Buyers Report

With its sleek and user-friendly design, this ventless gas fireplace has won the hearts of many users. Its incredible features and amazing heat output make the home warm and cozy in a matter of minutes. The flames are also thicker and fuller, and the exterior is cold to touch for protection.

Why it Stands Out to Us

Looking for a free-standing ventless gas fireplace that is easy to operate? This model by Pleasant Hearth is designed just for you! It is super easy to set up and can heat a large room in very little time. It also looks amazing and performs flawlessly. 

Moreover, it comes equipped with an automatically controlled thermostat that changes the temperature accordingly. Large ventless gas fireplaces can be difficult to assemble and install, especially for a larger room for better heat coverage. However, this one is powerful enough to heat up a spacious room and also assembles easily! 

Bottom Line

If you want more performance for less hassle, then this is the perfect ventless fireplace you should get. You can also purchase a blower separately for even heat distribution across the room. Overall, this one is a great investment for your home.

Best Corner Ventless Gas Fireplace:
Pleasant Hearth 36" VFF-PH20NG-2T1

Pleasant Hearth 36 Compact Tobacco Natural Gas Vent Free Fireplace System 20,000 BTU


  • Heats up to 700 square feet
  • Can be installed on the wall or in a corner
  • Comes in a fine, superior tobacco finishing
  • Heat output is up to 20000 BTUs, which is quite powerful
  • Thermostat knob automatically controls and maintains the ideal level of heat


  • Only functions on natural gas and not propane

What Recent Buyers Report

The minimalistic and classy design of this fireplace can jazz up any home. In addition to having a superior exterior, users were thoroughly impressed with the performance of this fireplace. It is not only high in quality but is also super easy to assemble or install anywhere in the home.

Why it Stands Out to Us

Having up to 20000 BTUs of heat output, this powerful ventless fireplace is designed for immaculate performance. It is designed with the highest quality materials, and its minimalistic design allows for its easy installation on the wall or any corner of your home.

Along with that, the unit has many positive reviews, which all point to how effectively the fireplace brings warmth and coziness to the room. It is also very easy to use, as it comes with a thermostat equipped to change the temperature settings accordingly. 

Bottom Line

For an effective and efficient heating system in your home, this model by Pleasant Hearth will leave you pleasantly surprised. It is easy to use, easy to install, and looks really aesthetically-pleasing in your lounge or dining area.

Best Ventless Natural Gas Fireplace:
Duluth Forge DF300L

Duluth Forge Ventless Linear Wall Gas Fireplace - 26,000 BTU, T-STAT, Model DF300L


  • Slim and stylish outlook
  • High heat output of 26000 BTUs
  • Can be fueled by natural gas and liquid propane
  • 99.9% energy-efficient and environment-friendly
  • Comes with safety features to protect you from harmful gases


  • Customers had an issue with getting aid from the customer service representatives at Duluth

What Recent Buyers Report

With an elegant, sleek design and numerous impressive features, many users found the fireplace attractive and useful. It is also extremely powerful and can radiate up to 26000 BTUs of heat. It is also easy to install and warms up the room in a matter of minutes.

Why it Stands Out to Us

This slim and stylish fireplace is designed with patented dual-fuel technology for efficient heat output. The flames also light up in a beautiful way as they are enhanced with the help of a ceramic hand-painted log, which produces a glowing effect. It can also heat up around 1400 square feet of space.

Furthermore, there is an automatic thermostat included in the unit so that the temperature is controlled according to the room, and the energy is saved. This lowers your electricity costs and makes the unit more economical as well. It is also equipped with five different heat settings for your comfort.

Bottom Line

The best kind of ventless fireplace system that you can find, which is powered by natural gas, is this one. With its slim design and highly innovative technology, it is bound to leave you impressed.

Pros and Cons of Ventless Gas Fireplaces

Ventless fireplaces do not require a chimney or flue to release harmful gases. There are several benefits as well as disadvantages of installing one in your home. Let’s take a look at their pros and cons:


First, let’s discuss some of the benefits of owning a ventless gas fireplace:


Ventless gas fireplaces are more energy-efficient, with an efficiency rating of up to 99.9%. You will enjoy a warm and comfortable space without putting a lot of burden on your pocket. 

Environmentally Friendly

Since the logs in these fireplaces are artificial, they are more environment-friendly. This is because the logs are not made from chopping wood, but are synthetic.

No Debris

Unlike the fireplaces that power on wood, ventless fireplaces produce no ash or debris when the fire is put out, so you do not have to take care or maintain it as frequently.


These units also come in a varying range of sizes and colors so you can easily choose one that matches your house and its aesthetics.


Let’s take a look at the downside of owning a ventless gas fireplace:

Water Vapor

One of the main disadvantages of owning such units is that the by-product of combustion is water vapor. This may be a good thing for dry weather, but it can also create mold issues.

Ventless Gas Fireplace Safety

Having improper installation, improper usage, incorrect sizing of the fireplace, and the appliance's failure to work properly can cause safety hazards for you and your family. You must contact professionals and product manufacturers to make sure that the product is well installed and ensure safety.

For the assurance of your and your family’s safety, be sure to read these following questions and answers to get a better insight on how to handle ventless gas fireplaces.

Are Ventless Gas Fireplaces Safe?

Ventless fireplaces may reduce the toxic fumes and gases to some extent, but there is still a risk of being exposed to harmful gases such as carbon monoxide. This is especially true for models that lack an ODS or an oxygen detecting sensor that can pick up on the harmful fumes.

Why Are Ventless Fireplaces Illegal in Some Places?

These units are illegal in some parts of the US because they carry risk and are a hazard to your health if left on for too long. The person can inhale carbon monoxide without knowing, which can damage the respiratory system and be fatal in a matter of a few minutes. 

Can a Ventless Fireplace Make You Sick?

Yes, there is sulfur dioxide in these units, which can irritate, such as difficulty in breathing, coughing, wheezing, and other issues. It is also problematic and dangerous for elderly people who suffer from asthma or young children who are exposed to this gas for a long time.

How Long Can You Run a Ventless Gas Fireplace?

A ventless gas fireplace should run no more than three hours, and it should have a proper venting system as the gases can penetrate in your home. It is not safe to leave it on overnight when you are sleeping, as this can cause detrimental damage to your health and lungs.

Do Ventless Gas Fireplaces Give Off Carbon Monoxide?

Even though ventless fireplaces reduce the toxic and harmful gases to a great extent, there is still a risk of being exposed to carbon monoxide or other harmful toxins. This usually occurs when water vapor is exposed in the air in large quantities. 

Is it OK to Leave a Gas Fireplace On All Night?

As mentioned previously, a ventless gas fireplace should run no more than three hours as harmful gases can penetrate your home and your body. It is not safe to leave it on overnight when you are sleeping as this can cause permanent damage to your health and lungs, and even be fatal.

Vented vs. Ventless Gas Fireplace - Comparison Overview

Gas fireplaces usually come in two forms: vented and ventless configurations. Both have a lot of differences between them, but there are similarities too. Let’s delve deeper to discuss more about them:


Let’s take a look at some of the differences between the two types of fireplaces:


Vented fireplaces emit harmful gases through a chimney or a flue, as they produce high amounts of carbon monoxide. Ventless gas fireplaces do not require a chimney or flue as the heat stays in the room, and it reduces a large amount of harmful and toxic gases.


Vented fireplaces are not as efficient or fast in warming up a room, and are used more for ambiance and aesthetic purposes rather than heating. A gas-fueled ventless fireplace system produces heat in greater output in much lesser time.


There are a few similarities as well between the two models:


Even though ventless fireplaces reduce harmful gases, there are still chances of carbon monoxide seeping in the air from some place as the longer the fireplace is on, the more dangerous it can get. This is also the case with vented fireplaces, especially if the fireplace hasn’t been serviced by a professional in a while.

How to Install a Ventless Gas Fireplace 

Installing a ventless gas fireplace is not that difficult. Let’s take a look at how you can safely install one at home:

  1. Find or locate a spot where you want to install the gas fireplace.

  2. Screw and install the wooden parts in order to get a perfect fit for the fireplace. This is in case you don’t have a fireplace spot already and need to create one of your own.

  3. Place the ventless fireplace onto the fixed position you have chosen and install it with the screws based on the type of model you have.

How to Vent a Ventless Gas Fireplace

Unfortunately, there is no method which you can use to vent a ventless gas fireplace as they are not intended or built that way. The only way you can get ventilation is to purchase a direct vented fireplace and replace it.

How to Light a Ventless Gas Fireplace

The thermostat in the fireplace needs to be shifted from the off to the “Pilot” position so that the gas is manually sent in the system. Press the igniter button so that the flames are formed inside the fireplace.

Here is a video for a better visual guide on installing a ventless fireplace:


We hope that this article was useful in determining which ventless fireplace model is good for your home and your needs. You should make several considerations before you get one, so be sure of your requirements before you go shopping. Good luck!

People Also Ask

If there are still some concerns regarding how ventless fireplace systems operate, you can go through this portion. Here you will find the answers to all the frequently asked questions that consumers have. These will provide you a better insight into these machines and their process:

Can You Put a TV Above a Ventless Gas Fireplace?

Yes, you can put a television above the ventless gas fireplace, but you must ensure that the heat does not get too much. This can be avoided by installing a mantel on top of the fireplace so that the heat does not come near the television and damage it.

How Much Does it Cost to Install a Ventless Gas Fireplace?

The price of a ventless fireplace system installation depends on the model which you are buying. The range for the installation is anywhere between $2300-$10000, depending on the extra plumbing work, aesthetics and ductwork included. 

How to Clean a Ventless Gas Fireplace

In order to clean out a ventless gas fireplace, you should get yourself a vacuum with a hose and a brush on its end. You can use this vacuum to brush and take in all the dust and debris from the burner. Make sure the logs are placed on the burner correctly as they could produce soot.

How Do I Go About Installing Ventless Gas Logs in an Existing Fireplace?

You need to check whether the model of the fireplace that you’re using allows the logs to be installed or not. You can add steel reinforcement bars to ensure strength and protect them from falling. Ventless gas logs produce a smokeless flame, so they do not require a chimney.

Can You Vent a Ventless Gas Fireplace?

Unfortunately, as mentioned before, there is no method to vent a ventless gas fireplace as they are not intended or built that way. 

My name is Bob Wells and I am a retired HVAC tech from Washington state. I am currently retired and no longer do much with HVAC, however, I feel like I have a lot of knowledge in the subject and I wanted to create a website where I could talk about what I've learned and help upcoming HVAC techs. Find more info about me and HVAC Training 101.