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InsightHorizon Digest

Is a flue liner necessary

Author

Isabella Browning

Updated on April 08, 2026

Secondly, while not mandatory, flue liners are highly recommended by most stove installers, and for good reason. Along with offering improved safety, cleanliness and efficiency, one of the main benefits of fitting your stove with a flue liner is also better performance.

Do you really need a chimney liner?

A chimney liner might not seem like an important part of your chimney, but in reality, it’s extremely important and improves the safety of your fireplace and home. Additionally, a chimney liner is required to be present to pass inspection for property transfer.

Why would I need a chimney liner?

A chimney liner protects the chimney liners masonry and joints from the heat of the fire. It also protects the chimney from the corrosion that can be inflicted by the acidic flue gases that emanate from the fire. By preventing overheating and corrosion, a chimney liner ensures a longer life for your chimney.

Do I need a flue liner for a gas stove?

For balanced flue, the answer is a simple no. These types of flue don’t require any type of liner. If you have a regular gas stove though, then you might want to consider a flue liner. … A flue liner does not mean that you can forgo having a safely working chimney.

Does a brick chimney need a liner?

Many older homes have unlined brick chimneys. They were built during a period when most building codes didn’t require them. Today, most building and fire codes require chimney liners, even if you have a brick chimney. And the Chimney Safety Institute of America (CSIA) also recommends them.

Do all chimneys have a flue?

Technically, a flue is any open vertical space in a chimney that allows smoke to escape the home from the firebox. But because every chimney’s flue must be lined, a chimney liner is usually referred to as the flue, as well. Every wood-burning or gas fireplace has a flue.

How much is a chimney liner cost?

Chimney Liner Installation Cost For the average homeowner, having a chimney liner installed costs about $2,500. For more expensive materials, prices tend to average at $5,000 and could climb to $7,000. With an easy-to-install material like aluminum, the DIY cost of materials and equipment could be as low as $625.

How do you install a gas fireplace without a chimney?

Flueless Gas Fire With a flueless gas fire, you don’t need to have a chimney at all to enjoy a fireplace. You don’t need to carry out as much building work to install one, either. You will just need to fit a 100cm2 ventilation brick on any exterior wall and connect your fire to a gas pipe.

Why do gas fires need a flue?

Why do gas fires require a flue but gas cookers normally vent their combustion products inside the building? ALL gas-burning appliances need an adequate supply of fresh air to burn properly, and all produce a small amount of the toxic carbon monoxide gas in the combustion products.

Can I reline my chimney myself?

Yes it can – and will! While having your chimney liner professionally installed can be more convenient but ends up being costly, averaging anywhere from $2,500 to $5,000. With our DIY Chimney Liner Kits you will have all the components needed to reline your chimney and you wont break the bank!

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How long does a flue liner last?

The average lifespan of a chimney liner is 15 to 20 years. After two decades you will probably need to get the entire liner replaced to make sure it’s still up to code and not a serious fire risk.

How much does a stainless steel chimney liner cost?

The average cost of a stainless steel chimney liner is around $1,980 when installed by a local chimney professional. For do-it-yourself homeowners, expect to pay around $625 for a ready to install, 6″ x 25′ foot flue liner kit and DIY installation.

Should chimney be cleaned before installing liner?

If you have determined that you will need to install a new chimney liner, you will need to clean your chimney, fireplace or woodstove thoroughly before the new installation begins. … The liner should reach from the top of your chimney to the damper throat or other connection at the bottom of your flue.

What's the difference between a chimney and a flue?

A flue is the channel, pipe, or tube through which gases and smoke travel from a source of combustion (fireplace, furnace, boiler) to the outside environment. … A chimney is, on the other hand, in its simplest definition, the housing that encases the flue. It is usually made of masonry, brick, or stone.

What is purpose of flue?

A flue is a duct, pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors.

What is the difference between a flue and a vent?

Vents are always factory built. They are not chimneys, as they cannot handle the high temperature of wood combustion. Some vents, however, may run through a chimney, given that anything else venting through the chimney is contained in a separate flue.

Why does a gas oven not need to be vented?

Gas ranges do not necessarily require venting as much as electric ranges because they burn relatively clean. However, keep in mind that ventilation is used to remove heat, smoke, steam, and grease – plus the byproducts of burning gas.

Do you need a flue for an electric fire?

Electric fireplaces do not need a vent, chimney, or flue. They do not emit smoke or toxins from combustion since they don’t burn fuel.

Do gas heaters need a flue?

An unflued gas heater has no flue and releases the combustion pollutants and water vapour directly into the room. Some unflued gas heaters can be moved around and these have a flexible hose to plug them into a wall or floor socket.

Can you put a fireplace in a house with no chimney?

Yes, it is possible to add a wood burning stove or a fireplace without an existing chimney, but you do need to install a chimney in the process. All wood burning fireplaces have to have a way to allow smoke and dangerous gases to exit your home.

Do all gas fireplaces need to be vented?

Do Gas Fireplaces Need Venting? Not all gas fireplaces need venting. Both natural vent and direct vent gas fireplaces need venting, which exhaust air up a chimney and through the wall to the outside respectively. Ventless gas fireplaces don’t need venting.

Do vented gas fireplaces require a chimney?

A Direct Vent Gas Fireplace does not require a chimney and can vent horizontally out a sidewall or vertically through a roof. Direct Vent Fireplaces have a completely enclosed chamber that is extremely efficient, drawing in air for combustion from the outside and expelling gases to the outside as well.

How long does it take to install a chimney liner?

Chimney liner installation takes 4 to 8 hours on average. Fire codes require most solid-fuel chimneys to have a liner.

Do I need a chimney liner if I don't have a fireplace?

However, if you’re not using your fireplace and your chimney acts solely as a vent for your furnace or water heater, you may not need to have a liner installed. … Homeowners with gas or electric inserts most likely do not need a new liner because those types of fuel don’t produce enough heat to damage a masonry chimney.

Do you need to clean a stainless steel chimney liner?

Chimneys with a stainless steel liner require cleaning as frequently as other types of lined, and unlined, chimneys. … If there is creosote build-up at any point on the stainless steel liner, the chimney should be cleaned to reduce the risk of a chimney fire.

How often should a chimney be swept?

Q. How often should I have my chimney swept? This a tougher question than it sounds. The simple answer is: The National Fire Protection Association Standard 211 says, “Chimneys, fireplaces, and vents shall be inspected at least once a year for soundness, freedom from deposits, and correct clearances.

Does chimney sweeping remove creosote?

Not only can a chimney sweep get rid of stage one creosote, but a pro can clean up stages two and three as well. While a chimney sweeping log loosens creosote buildup, it won’t get rid of it. A professional chimney sweep can dispose of the creosote so that you don’t risk it catching on fire.

Do chimney sweep logs work?

Do Chimney Sweep Logs Work. … Many homeowners wonder if the chimney sweep logs or creosote sweeping logs really work to clean out fireplace flues and get rid of creosote residue so that the fireplaces are safe to use. The short answer is no, they don’t work.

Is a damper and flue the same thing?

A damper is located in the flue of your chimney. The flue is where the smoke escapes when the fire is going. Dampers are placed inside of the flue to help control ventilation. Your damper should have a chain or handle that you can access in order to open and close it.