Are Ventless Fireplaces Safe? | Woodlanddirect.com (2024)

Adding aVentless,or Vent-Free, fireplace isa popular solution forhomeowners who want the look andfeel of awoodburningfireplacewithoutcommitting to thecostly renovationsrequiredto add achimney.

Ventless fireplacesarespecificallydesignedto burn at nearly 100% efficiency,leavingno smoke and little to no fumes behind.Plus, you canputone in practically any roomofthe house.

When installed correctly,Ventless appliances serve as excellent secondary heating solutions and are considered very safe.They’re also equipped with safety systems thatprevent poor air quality and reduce health risks.

We’ve outlined the mostimportantthingsyou needto know about Ventlessfireplaces to help youdetermine if it’s safe to install one in yourhome.

HOW VENTLESS FIREPLACES WORK

Ventless gas fireplacesdon’t require a chimney or venting system of any kind, allowingallthe heatthat’sproducedtostay inside your home.

Theyfunction on a closed-loop systemand rely on natural convection. Coolindoorroom air is drawn into the firebox for combustion,then hot exhaust is expelled into the room.

Are Ventless Fireplaces Safe? | Woodlanddirect.com (1)

Equipped with special burners that use a small amount ofNatural Gas or Liquid Propane,Ventless units emit little tono gases after combustion. What remains will typically be made up of water vapor and carbon dioxide.

Thoughany dangerous gases left will be minimaland within safe limits, Ventless fireplacesincludebuilt-in sensors that monitortheoxygen levelin the room. This important feature allows them to operate safely without a chimney.

SAFETY CONCERNS OF VENTLESS FIREPLACE

Certain states, like California, have outlawed indoor installations of Ventless fireplaces altogether, while others have strict installation requirements.

If you’re installing a Ventless appliance in your homeor commercial space, always take the safe route and check your local building, city, state, and fire codes,along withthe minimum room size requirementto ensure your product is compliant.

Are Ventless Fireplaces Safe? | Woodlanddirect.com (2)

Lung Irritation

Ventless appliances can intensify odors that are already present inside your home.

Impurities, such as pet hair, scented candles, fresh paint, and cleaning chemicals, are drawn into the firebox, along with thefreshindoor room air used for combustion.

When these scentsareemitted back intothe room,they often become strongerandcanpotentiallycauselung irritation in sensitive individuals.

For this reason, it’s not recommended to install a Ventless fireplace if you or someone in your household has asthma, allergies, or chronic bronchitis.

Increased Humidity Levels

As oxygen burns for combustion in a Ventless fireplace, water vapor is produced, which increases humidity levels in your home. This can be a great source of extra moisture in the dry winter months, especially if you live in a cold climate.

However, if you plan on letting your Ventless fireplace burn for an extended amount of time, it’s recommended to leave a window cracked near the fireplace to preventexcess condensation, which could lead to mold or mildew growth.

REQUIRED SAFETYCRITERIA

Oxygen Depletion Sensors

Without enough oxygen, Ventless fireplaceswon’tburn cleanly. For this reason,each fireplace isequipped withanOxygen Depletion Sensor(ODS), which continuouslymonitorsthe oxygen levels in the room and automatically shuts the fireplace off if oxygen levels drop below the safe threshold of 18%.

You will also need to install a carbon monoxide detectornear your fireplaceas a secondary precaution.

BTU Limits

While Ventless fireplaces make great secondary heating sources, they are limited to a maximum of 40,000 BTUs per hour to ensure there is enough oxygen left in the room.

For bedroom and bathroom installations, the maximum BTU output is even more limited, allowing only 6,000 to 10,000 BTUs, no matter the size of the space.

APPROPRIATE BURNING MEDIA

Ventless fireplaces come witha variety ofmedia options, like fire glass, gas logs,andfirestones.

If youchoosegas logs for your media bed, they must be installed to the manufacturer’s specifications and cannot be modified in any way. Ventless gas logs are designed to fit together in a specific pattern to prevent the flames from impinging on the logs.

If the flamesbrush against thelog setinside your Ventlessfireplace, the finishing materialwillburn offand create harmful byproducts that infiltrate your home.

Alwaysbe sure tofollow the diagram inthe installation manual to ensure you’ve achieved the proper placementfor yourVentlessgas logs.

Are Ventless Fireplaces Safe? | Woodlanddirect.com (3)

INSTALLATION GUIDELINES

Since they don’t require a chimney or venting of any kind,Ventlessappliancesoffer youmorefreedom andflexibility toadd ambiancetoa variety ofspaces.They’re ideal for condos, apartments, offices, and high-rise penthouses due to their straightforward installation.

However,Ventless fireplaces will require a hard-piped gas line for installation. If you don’t have a gas line inside of your home already, you’ll need to hire a licensed professional in your area to install one for you.

Are Ventless Fireplaces Safe? | Woodlanddirect.com (4)

To make sure you’re selecting an appropriate and safe locationforyour Ventless fireplace, we recommend choosing a few models that you like, thenchecking theirinstallationmanualsfor specific installation requirements.

Be sure to measure the cubic footage ofyourspace to make sure it’scompliantwith the room size requirementsnoted in each manual.

From there, you’ll need toensure the fireplace and location you’ve chosensatisfyyourlocal, city, and state codes.

Once you’ve purchased your Ventless fireplace, you’ll need to hire a license professional to installit.

If an individual who isn’t adequately trained and certified in gas products installs the fireplace, the warranty will be void on your product and you may encounter technical issues, or severe health and safety concerns.

Are Ventless Fireplaces Safe? | Woodlanddirect.com (5) Pro Tip:

We highly recommend choosing a gas professional certified by the National Fireplace Institute (NFI).

Your certified installer willsimplyfollow the instructions in the installation manualthat comes with your Ventless fireplace.

If youor your installer havequestionsaboutfirecodes,the instruction manual,or installation requirements,pleasecall our team of NFI certified expertsat800.919.1904 andwe’llwalkyouthrough the process.

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WE’RE HERE TO HELP

Have more questions about Ventless gas fireplaces? We’d love to help! Call our team of NFI certified experts todayat800.919.1904.

SHOP VENTLESS FIREPLACES

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Learn the differences between Ventless and Vented gas fireplacesto find the perfect model for your home!

Stillstumped on theright Ventlessfireplacestyle foryourspace?Check out our top5 modelsto gain some inspiration.

Discover severalgreatadvantagesVentless gas fireplaces have overtheir woodburning counterparts.

Are Ventless Fireplaces Safe? | Woodlanddirect.com (2024)

FAQs

Are Ventless Fireplaces Safe? | Woodlanddirect.com? ›

What remains will typically be made up of water vapor and carbon dioxide. Though any dangerous gases left will be minimal and within safe limits, Ventless fireplaces include built-in sensors that monitor the oxygen level in the room. This important feature allows them to operate safely without a chimney.

Is it safe to sleep with a ventless gas fireplace on? ›

Though ventless fireplaces have been tested and are deemed to be safe it is still not recommended that they be used for more than a few hours at a time.

Which is safer vented or ventless fireplace? ›

Vented fireplaces offer the traditional look and feel of a wood-burning fireplace with safer emissions, while ventless options provide superior efficiency and flexibility in installation.

How long does a ventless fireplace last? ›

A well-maintained vented gas fireplace log can last up to 10 years while a well-maintained ventless fireplace log can last anywhere from 3-5 years. So be sure to keep up with your yearly fireplace inspections and cleanings.

What to know about ventless gas fireplaces? ›

Each ventless model has a regulator that mixes gas and air, eliminating exhaust fumes to work similarly to a kitchen gas range. Ventless models burn so cleanly that you won't need a chimney flue at all. Smart Design: A ventless fireplace pulls air from the room and channels it through the regulator to create the flame.

What are the hazards of a ventless fireplace? ›

The two primary concerns with ventless fireplaces are carbon monoxide and oxygen depletion. Buy the right size ventless fireplace; this will prevent issues with oxygen depletion and carbon monoxide build-up. Measure the square footage of your room prior to shopping for a ventless fireplace.

Where do the fumes go on a ventless fireplace? ›

Ventless fireplaces release the emissions of their burn, including noxious gases such as nitrous dioxide and carbon monoxide, inside the home instead of outside the home like a direct vent fireplace.

What is the safest fireplace option? ›

“To date, electric fireplaces are the safest option for families with children or pets,” says Jen Stark, who runs the home improvement blog Happy DIY Home. Electric fireplaces don't create real flames. Instead, they light up to give the impression of fire while putting out heat.

What is the safest type of gas fireplace? ›

Answer: Direct-vent gas fireplaces are considered the safest kind of gas fireplace. They eliminate heat loss by drawing air from the outside of a home and then directing the air to the outside through a venting system.

Are direct vent fireplaces worth it? ›

Benefits of a Direct-Vent Fireplace

Direct-vent fireplaces are also highly efficient, converting most of the fuel they burn into usable heat, reducing energy waste, and lowering your utility bills.

What states ban ventless fireplaces? ›

Massachusetts, California, and a number of other states in the U.S., as well as Canada and other countries, have outlawed ventless gas fireplaces due to the aforementioned safety concerns. Many individual municipalities, too, have outlawed these appliances in states where they are otherwise legal.

Why does my ventless fireplace smell so bad? ›

In a gas ventless fireplace, oxygen is provided by the air in your home. If that air contains impurities, those impurities are drawn in with the oxygen and can produce odors which are amplified by the flame.

Can you run a ventless gas fireplace all day? ›

Vent-Free Gas Log Fireplaces

Many units have a built-in oxygen sensor that will automatically shut off the fireplace when low indoor oxygen levels are detected. Most gas fireplace safety experts recommend not running a vent-free gas log fireplace for more than three hours.

Is it safe to sleep with ventless gas fireplace on? ›

Model for periodic fireplace use

The reason is that the carbon monoxide produced during combustion will remain in the home and could harm those who live there. This isn't to say vent-free fireplaces are dangerous, rather they aren't designed to be on all the time like their vented counterparts.

What are the pros and cons of a ventless gas fireplace? ›

Finally, with a ventless fireplace, all the heat is released into the room, and no air drafts through a vent. That makes them highly energy efficient. However, running them for long periods is not advisable unless you crack a window to draw in fresh (cold) air, which immediately reduces their energy efficiency.

What is the best brand of ventless gas logs? ›

Top 5 Vent Free Gas Log Sets for 2023 | Customer's Pick!
  • #1 - Empire Flint Hill Ceramic Vent Free Gas Logs.
  • #2 - Evening Fyre Charred Vent Free Gas Logs.
  • #4 - Foothill Oak Vent Free Gas Logs.
  • #5 - Charred Alpine Birch Vent Free Gas Logs.

How long can you safely run a ventless gas fireplace? ›

Vent-Free Gas Log Fireplaces

Many units have a built-in oxygen sensor that will automatically shut off the fireplace when low indoor oxygen levels are detected. Most gas fireplace safety experts recommend not running a vent-free gas log fireplace for more than three hours.

Can you leave a gas fireplace on while sleeping? ›

Answer: Flammable objects should be kept away from a gas fireplace whether it is on or off. Furniture, decor, and other objects should be at least three feet clear from the front of the fireplace. Answer: It is not safe to leave a gas fireplace on overnight or while sleeping.

Can you put a ventless gas heater in a bedroom? ›

The SC-10 (rated at 9,500 Btu's) can be installed in bedrooms. All other models are too big. The National Fuel Gas Code (NFPA 54) permits wall mounted installation of vent-free gas heaters of 10,000 Btu's or less in bedrooms and 6,000 Btu's or less in bathrooms.

Can you leave a ventless heater on all the time? ›

They can heat a room up in just a few minutes, but they are not meant for long-term heating or heating more than one room. They were designed to only be used when necessary and under constant adult supervision.

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