Free shipping
Low Price
secure-order
View Cart

Vent Free Fireplace Inserts

Select
Ask & Answer
Ask a Specialist
By Tom from Sedalia, MO on October 22, 2013
I'm looking for a natural gas fireplace insert to use as a backup heat source. I have a fireplace and chimney that I currently have a Kozy Heat model DBL-2000 (Monticello) electric insert with surround. The surround is 8.5 inches on the top, 7 inches on both sides and 1.25 inches on the bottom. The dimensions on the actual fireplace are larger. I'm guessing maybe 36" wide by 25" tall but that is purely a guess as the surround covers the entire area and I cannot get an accurate measure without removing the surround. I will do so if necessary. The gas insert can be either direct vent or vent free. I'd prefer vent free due to costs. Can you suggest some models that might meet my needs?
By Collin C. - NFI Master Hearth Professional on October 23, 2013

Answer:
One of our most popular vent free inserts is the Medium Innsbrook Vent-Free Gas Fireplace Insert with Millivolt Controls. Based on your preliminary estimate, this unit would fit your opening. I will need to know the depth of your fireplace opening to ensure this model will fit. If it does, it can be used to heat up to 800 square feet of area.

By Shawn from Johnstown, PA on October 15, 2013
I have an 18" set of gas logs (vent free). Can I buy just the insert?

By Collin C. - NFI Master Hearth Professional on October 16, 2013

Answer:
Vent free gas logs and burners are mated to each other from the factory, as a dangerous release of soot or carbon monoxide can result if items from different manufacturers are paired together.

There should have been a metal build tag that came with the original burner, if you still have the item. If you no longer have it, I am afraid an entirely new kit will have to be ordered.

By Luis Molina from Atlanta on November 17, 2012
What makes a vent free fireplace "vent free"? Does it need a sensor? Does it need an automatic shut off valve?
By Tyler M. - Fireplace Specialist on November 19, 2012

Answer:
All vent-free appliances are equipped with an oxygen-depletion sensor (ODS) that will automatically shut off if oxygen levels in the room drop. This is built in to the pilot assembly of all of our vent-free fireplaces and stoves and is not an extra item.
By Collin C. - NFI Master Hearth Professional on November 19, 2012

Answer:
Vent free fireplaces are completely self contained. By using a lower output burner system, they are able to be used with no exhaust vent. These units will also have an oxygen depletion sensor that will close the gas valve, should oxygen levels in the room reach unsafe levels. These units make excellent supplemental heat sources when installed in large areas with plenty of circulation.

By Russell from Fincastle, VA on June 19, 2014
I presently have vent free propane gas logs. I am dissatisfied with the smoke damage to fireplace, mantel and ceiling. Does a vent free fireplace insert have less smoke to deal with?
By eFireplaceStore on June 19, 2014

Answer:
The amount of byproduct released generally has to do with the BTU output of the vent free set, rather than the type of vent free appliance. It is likely that swapping to a vent free insert will not cure the issue, especially because propane tends to have a greater amount of odorant that accelerates the creation of soot.

You may consider switching to a direct vent insert. While they are not as efficient as a vent free version, they still radiate a good deal of supplemental heat and do not use air from the room for combustion.

By Sandra from KY on July 9, 2013
Do you have a ventless fireplace insert set that can be used outdoors under a covered porch?
By Tyler M. - NFI Certified Specialist on July 9, 2013

Answer:
We have several models that you can use for your application. Please see our full selection of patio fireplaces below, then use the search options on the left-hand side of the page to select "Vent-Free" in the "Vent Type" category:

Patio Fireplaces

By Ron from Kingsville, MD on November 13, 2013
I need a set of ventless Peterson propane logs with an on/off remote that is about 20" wide, and a ventless insert around which I will build a mantle. What are my options?
By Tyler M. - NFI Certified Specialist on November 14, 2013

Answer:
We recommend one of our 32" vent-free fireboxes with an 18" Real Fyre log set, or a 36" firebox with a 24" Real Fyre ventless log set. Please see some options for each below:

Fireboxes

Ventless Gas Logs

By Larry from Hemet, CA on November 12, 2012
Are vent-free fireplaces contraindicated for people with asthma?
By Tyler M. - Fireplace Specialist on November 12, 2012

Answer:
Vent-free appliances are not recommended for homeowners with any respiratory issues, particularly asthma. For more information on this and other factors to consider, please see the "Vent-Free" section of our Gas Fireplace and Stove Buying Guide.

By rande from Idaho Falls, Idaho on February 10, 2013
Are there elevation restrictions? Can vent free be operated as a primary heat source?
By Collin C. - NFI Master Hearth Professional on February 11, 2013

Answer:
Vent free appliances have an elevation restriction of 4,500 feet. Due to the lack of oxygen, they suffer from frequent pilot outages at any higher elevation.

These units must also only be used as a supplemental heat source. Because of oxygen depletion, the unit will eventually shut down if used as a primary heat source. I highly recommend the use of a direct vent appliance as a primary heat source and at higher elevations.

By Nick from New Orleans, LA on January 2, 2014
I need to find a firebox that has a clear opening of at least 30"H. The width is less important. My client has tall andirons that she wants to place in the firebox. Whether the box is vented is not important, as a third party bio-ethanol burning device will likely be chosen to place in the box (any advice on this would also be helpful). I see a few models that are 34-36" high (overall dimension), but it looks like the actual opening would be too small to accommodate the andirons. Can you tell me if you have such a model?
By Tyler M. - NFI Certified Specialist on January 2, 2014

Answer:
Yes, we have a vent-free firebox with an opening height of right at 30", please see it here:

LCUF Universal Low Rider Vent Free Firebox with Firebrick Installed - 36"

That box has an opening of 32 1/2" wide and 30" tall.

By Dave from Virginia Beach, VA on November 13, 2012
I have an old pre-fab woodburning fireplace that needs replacing. I got an estimate of $6500 for the whole job. Can I seal off the chimney and install a vent-free gas insert in its place for cheaper?
By Tyler M. - Fireplace Specialist on November 13, 2012

Answer:
Yes, the cost to replace your manufactured fireplace with a vent-free unit should be considerably cheaper, even when factoring in the cost to run a gas line to the fireplace and removal of the original.

We offer several vent-free fireplaces that may interest you.

By Vipul from Chicago, IL on April 29, 2013
Do you have a vent free natural gas fireplace insert that will fit in a firebox that's 36 wide, 32 high and 24 deep? I'd like an insert with gas logs, blowers and is remote ready.
By Tyler M. - NFI Certified Specialist on April 30, 2013

Answer:
Thank you for this information. We recommend the Medium Innsbrook Vent-Free Gas Fireplace Insert with Millivolt Controls, which comes standard with the burner, log set, decorative brick panels, blower and remote-ready millivolt pilot assembly. You will need to add the remote control itself separately; options can be found in the "Accessories" tab on that item page. Please also note that your opening height of 32" will not be completely covered by the three surround options for that insert. You may want to consider adding the Empire SH1BL Fireplace Insert Shroud, which would fit behind one of the three surrounds and cover an area of 48" W x 37 7/8" H.

By Ken from Augusta, GA on October 23, 2012
I'm looking for a vent-free double-sided insert.
By Kevin E. - Fireplace Specialist on October 24, 2012

Answer:
We have a limited selection of see-through vent-free appliances, and fewer still that can be framed into a wall.

If you are searching for a zero-clearance, two-sided, vent free fireplace, please check out our Vail 36".

By Sheila from Bloomfield Hills, MI on March 7, 2013
I am looking for an insert that can be used with gel fuel cans - not the ethanol. I want the natural flame and crackling sound that the gel fuel offers. The gel fuel styles does are not quite what I want so I've decided to use a surround of my choice but I need the insert. Does your company offer that type of insert?
By Collin C. - NFI Master Hearth Professional on March 7, 2013

Answer:
Unfortunately, the company that we used to procure the inserts from, Classic Flame/Jensen, will no longer sell the insert by itself. All of their products will come with a surround or entertainment center as part of the package.

While I have looked, I have yet to find a supplier that will offer an insert by itself. I believe this is due to potentially liability issues that could arise if the unit was not installed properly into a listed surround. I apologize that I do not have a source that can provide just the insert.

By Jerry from New Jersey on October 24, 2012
Can you put vent-less gas logs in an electric fireplace?
By Tyler M. - Fireplace Specialist on October 24, 2012

Answer:
No. Ventless (or vent-free) gas logs are only meant to be installed in existing wood-burning fireplaces (brick/masonry or manufactured fireplaces that are listed to accept gas logs) or universal, vent-free fireboxes.

By Tim from MI on April 10, 2013
Are there advantages of having a ventless propane fireplace insert over a vented? Can a ventless propane fireplace be turned on by an external thermostat and run when the power goes off?
By Collin C. - NFI Master Hearth Professional on April 10, 2013

Answer:
Ventless and vented fireplace inserts both have their own set of advantages and drawbacks. Vented fireplaces use no room air for combustion and give a realistic flame pattern, but are not as efficient as a vent free insert and individual exhaust and intake liners must be used. Ventless appliances require no vent pipe to be run, are very efficient, and simple to install. However, they use room air for combustion and must be serviced on a yearly basis to prevent the release of harmful materials.

Both of these categories of insert can be equipped with a remote or wall thermostat. Millivolt (standing pilot) inserts can indeed be used in the event of a power outage as well.

By Terri from Kettering, Ohio on December 17, 2012
I'm new to this whole idea. I have a house built in 1962 with a large 48" by 24" wood fireplace. The pre-sale inspection came back as needing a chimney liner before it could be safely used. If I bought a vent-free insert, would I need to seal off the chimney? What other work would be required? When looking at insert costs, is there the insert AND the coals or logs?
By Collin C. - NFI Master Hearth Professional on December 18, 2012

Answer:
Generally, an insert is sold as a complete unit and will include the logs as part of the assembly. The insert will be a completely sealed system and would not require any connection to the existing chimney.

However, due to the wide and short dimensions of the fireplace, we do not have an insert that would completely cover the full width of the opening. Even with a surround, there would be some exposed space on either side. As such, a customer surround or backer plate would need to be custom-fabricated to take up the extra width.

Another option would be to use vent-free logs in the fireplace and have the chimney relined.

By Dosia from Goldsboro, NC on February 13, 2014
My fireplace opening is 44 1/2" wide by 28" high by 28 1/2" deep. What do you have to fit this opening?
By Collin C. - NFI Master Hearth Professional on February 13, 2014

Answer:
One of our most popular and reliable units that would fit your fireplace opening is the Medium Innsbrook Vent-Free Gas Fireplace Insert with Millivolt Controls. This model has the capability to be wired to a remote or wall switch for control of operation. It is important to note that the surround for this unit is slightly narrower than your fireplace opening. As such, the opening would need to be narrowed with additional trim sections.

By Debbie from Cape May, NJ on July 18, 2014
What size gas logs do I need for a 36" gas insert?
By eFireplaceStore on July 18, 2014

Answer:
Typically, a 24 inch set would be the correct size to use in a 36 inch box. However, if you would like to provide the front width, back width, and the depth of the fireplace opening, I will be happy to verify sizing.

By David from Glen Rose, TX on December 9, 2013
We have an existing insert that needs to be replaced. The available space is 38 3/4" W x 26 3/4" H x 15-16" D. It is propane, vent free, and has a blower. What do you suggest?
By Collin C. - NFI Master Hearth Professional on December 10, 2013

Answer:
One of our most popular inserts that will fit your criteria is the Medium Innsbrook Vent-Free Gas Fireplace Insert with Millivolt Controls. This unit offers excellent reliability and build quality, with an output that can effectively heat 900 square feet.

By Lavene from Ozark, MO on March 9, 2013
If I am replacing vented gas logs with ventless ones do I need to have a plumber do this for insurance purposes? The gas lines are already there and functioning, simply turned off at the gas logs this time.


By Collin C. - NFI Master Hearth Professional on March 11, 2013

Answer:
When making any gas connections, I highly recommend have a licensed plumber do the work. They will be equipped with the tools to properly seal and leak test their connections.

By Lavene from Ozark, WV on March 9, 2013
I am considering replacing my existing seven year old vented gas logs with ventless in increase the efficiency. I was told that I could just shut the damper, replace the existing log/burner unit with the ventless one and enjoy it. This sounds too easy. Is there a safety issue, or an insurance coverage issue with just doing this?
By Collin C. - NFI Master Hearth Professional on March 11, 2013

Answer:
Replacing a vented log set with a vent free version is indeed a fairly simple conversion. The only thing to consider is the amount of space the unit is heating. Vent free heaters have a tendency to add moisture to any room they are operating in. They also draw all of their combustion air from within the room. As such, they work best when installed into a large space with good air circulation. Other than this stipulation, they are a great way to add supplemental heat to a room.

By Pat from Columbus, Ohio on September 18, 2013
What is required to use "wellhead" natural gas in a vent free fireplace insert?
By Collin C. - NFI Master Hearth Professional on September 18, 2013

Answer:
There is technically nothing separate that is required to operate an appliance on wellhead gas, however every manufacturer that I know of advises against it. Lack of odorants, possible impurities, and variation in BTU content are all concerns. To ensure safe operation, it is best to use only city supplied or treated and stabilized gas.

By Joel from Buffalo, NY on May 21, 2014
I have a pretty nice electric fireplace and I would like to keep the unit, but replace the box with a natural gas vent less unit. Can I do this?
By eFireplaceStore on May 21, 2014

Answer:
Usually, a gas fireplace and an electric fireplace are self contained assemblies that operate using their respective systems. There is not a way to use an electric fireplace inside a vent free gas unit, as the vent free system will have its own burner and log set.

By Shenna on November 9, 2012
I am trying to find a modern gas fireplace, linear (not square), to put on an internal wall with venting out the top to the roof, no logs but with crystals/stones/rocks, with zero clearance. Can you help me find that?
on November 9, 2012

Answer:
We have a few options to help you in your quest for a linear top-vented fireplace. Please see a few of our available units below: Top-vented Fireplace 1 Top-vented Fireplace 2 Top-vented Fireplace 3 Top-vented Fireplace 4 Please see each of those pages for more information on each unit, including a link to a downloadable owner's manual for each, located below the item description and features. We also have vent kits available for each of these units. Please let us know if you have any additional questions.

By Martin on November 9, 2012
What is a millivolt control? Does the pilot light stay on all the time with a natural gas fireplace? Can you manually turn your fireplace off and on? Do you have to have a remote control or a thermostat?
on November 9, 2012

Answer:
A millivolt system has a small flame that generates power for the unit's gas valve to operate. As a result, they do not require outside power to operate and can be used in the event of a power outage. The only thing that would be rendered inoperable would be the blower, if applicable. Because of the amount of power the fan needs to operate, it cannot be used during a power outage. With a millivolt system, yes, the pilot will stay lit all the time with natural gas (or propane). You can indeed manually turn it off and on with the control knob. You can even turn it all the way off (extinguishing the pilot) if you wish, but you will have to re-light the pilot every time you want to operate the fireplace. Otherwise, it will go from fully operational back down to just the pilot light. The knob will have three options - "OFF", "PILOT", and "ON", indicating these three options. On almost all of our millivolt units, you can indeed purchase an optional hand-held remote control or a wall-mount thermostat. We also have hand-held remotes that feature thermostatic control. If you want, please advise on any specific unit or units that you are interested in, and we will be happy to help you explore all of your options regarding remote controls. Please let us know if you have any additional questions.

By Kris on November 9, 2012
I currently have a gas burning fireplace that vents up an external chimney. The fireplace is not the type that can burn real wood. It burns gas only. The front is a solid piece of glass that does not open. Can I remove that insert, plug off the chimney pipe and make a direct replacement with a vent free fireplace insert? With the current fireplace, way too much of the heat goes up the chimney so I would like to put in a direct venting unit so that all of the head stays in the house.
on November 9, 2012

Answer:
While you would not be able to pull the burner assembly and log set from your direct vent fireplace and replace it with a vent-free burner, you should be able to remove the entire direct vent fireplace and replace the entire appliance with a vent-free alternative. Please follow the below link to view some of our vent-free appliances. Vent-Free Fireplaces We're happy to discuss this renovation with your further. Please let us know if you have any additional questions.

By Boykin on November 9, 2012
I work for a developer and trying to find modern styled vent free fireplaces that run on natural gas. Do they exist or do I need to buy a contemporary box and then find an insert (river rock, glass, etc.)?
on November 9, 2012


By Kurt from San Diego, CA on May 21, 2014
I have a precast fireplace that has some cracks in it and it was deemed unsafe to use as a wood burning fire place. Can I use a vent free fireplace insert and not worry about heat transfer ?
By eFireplaceStore on May 22, 2014

Answer:
Generally, it is not an issue to use a vent free insert in a fireplace that has been deemed unsafe for use as a wood burning model. However, vent free appliances are not legal for use in California. Would you consider using a direct vent insert instead? Like a vent free insert, a direct vent model will use a self contained, slide in chassis. However, it will utilize a pair of 3 inch flexible aluminum liners that will run up the existing chimney to a termination. One liner draws outside combustion air and the other vents exhaust gases.

By Tracy Marks from Ardmore, OK on December 10, 2012
My house is heated by a heat pump. When it gets cold, it is not too efficient. I have a functioning fireplace but we never use it. I would like to get something to insert in the fireplace that would burn LP and would blow out some hot air to supplement our heat pump. What would you recommend?
By Collin C. - NFI Master Hearth Professional on December 10, 2012

Answer:
For supplemental heat, you would be best off to use a set of vent-free gas logs. Traditional vented gas logs are largely for looks and do not add much heat to the immediate area, while vent-free logs are classified as room heaters and can supply enough heat to warm a 800-square foot area on average.

Vent-free fireplace inserts have several advantages over vented models. Since they don't require any venting or external equipment, you can place them in both free-standing mantel cabinets and masonry fireplaces that are no longer functional. In terms of efficiency, vent-free inserts are also superior to vented ones. Vented units can lose a significant amount of the warm air they produce up their chimneys, but ventless fireplace inserts are entirely self-contained, allowing all of the heat to remain inside the home.
Refine by
Shipping Options
Brand
Specific Use
Size
Vent Type
Fuel Type
Fireplace Type
Max BTU Output
Price
Rating
Categories
Testimonials
Sign Up for our Newsletter
Home About Us Contact Us Customer Service Order Status View Cart Fireplaces Fireplace Inserts Wood Stoves Gas Logs Mantels Fireplace Accessories Chimney Products Outdoor Fireplaces