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Round Stainless Steel Insert Boot

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Round Stainless Steel Insert Boot

A round stainless steel insert boot is designed to make the connection from an insert between a square or rectangle flue outlet and a round chimney liner.  Many old style fireplace inserts have a rectangle flue outlet.  This is because at one time they believed it to be OK just to set the stove inside the fireplace and call it good.  This is no longer the case.  Now we know of the dangers caused by this type of install.

What size Insert Boot do I need?

Every stove needs a proper size chimney liner for proper draft.  The square inches of the outlet on the stove needs to be as close as possible to the amount of square inches of the chimney liner.  First, you measure the length and the width of the flue outlet on the stove (as seen in pic).  Once you have your total square inches, you now know what size of insert boot you need.  insert boot

Insert Boot Measurements

A round chimney liner is designed to be mechanically mounted to the insert boot.  The insert boot will also need to be screwed to the top of the insert.  You need to install an insert boot that will accept a chimney liner that can handle the same amount of square inches as the outlet on the stove.  This means for example, if your measurements are 4″ x 9.5″, your total square inches are 38″.  Now it is as simple as finding a chimney liner that will handle 38″ square inches.


In conclusion, you will simply use the above chart to discover what size chimney liner you need and what size round insert boot you may need also.  One possibility that you may encounter is, on some stoves, the flue outlet is extra large.  The average insert boot may not cover the flue outlet.  Do not worry.  Give us a call and we can make one to any size you need.   If you are still confused or have other questions about purchasing and installing a chimney liner and an insert boot, please contact us 1-866-941-5112 or visit us on Facebook.

insert boot

Why do you need a chimney liner?

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Why do you need a chimney liner?

You may ask, “Why do you need a chimney liner?”.  You may think that your chimney has been there for almost a hundred years and as far as you know it is safe.  So why is my chimney sweep telling me I need to install a chimney liner now?

Chimney liners are designed to keep the harmful gases of your furnace or creosote from the stove inside the chimney and keep them from entering your home. Many homes have a chimney with very old technology. They have terra cotta (clay) flue liners. They were designed to work with coal, they still do work for coal. But now very few people burn coal as a main heating source.

Why do you need a chimney liner if you are burning gas, oil or wood?

Today many people burn natural gas and home heating oil. The terra cotta flues were not designed to withstand the acids inside the exhaust. Wood burning stoves create creosote, that when hot, is a flammable liquid. This creosote can be seen in the picture leaking into the home.  This is an extremely dangerous chimney.  As you can see the flammable creosote is now entering into the home and can easily ignite, catching the home on fire.  With gas and oil burning appliances, eventually the terra cotta deteriorates, creating he possibility of the chimney flues falling over inside the chimney.  This will creat a blocked chimney, a very dangerous situation for your family.
Why do you need a chimney liner
You need a stainless steel chimney liner, it is what will stand up to the harsh exhaust from a modern furnace and the dangerous creosote from a wood stove.

Why you need a chimney liner?

Seasoning Firewood

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The importance of Seasoning Firewood

Now that the burning season for most of has finished, we have to start thinking about seasoning firewood for the seasons to come.  Hopefully you already have your firewood split and stacked for the coming burning season.  In a perfect world you would already have 2 years of firewood stacked.  This is because some wood can take around 3 years to be ready to burn.

Dangers of not seasoning firewood

Many dangers can result in burning wet wood.  This will create more creosote in your chimney.  That is a fact, wet wood equals a dirty chimney.  A dirty chimney puts you at a high risk of a chimney fire.  Having unseasoned firewood means you have too much water in the wood.  This also means you will not get as hot of a burn as you would like to in your wood stove, causing o to waste more wood than you would have to to heat your home.  The glass on your stove also gets lots of creosote build up, taking away from the ascetics of a real fire.

One sign that your wood is too wet is that when it burns it is smokey.  The best way to know if your wood is dry enough is to buy a moisture meter.  Moisture content should be 20% or less.  If it is much higher than that, your firewood needs to be dried.  It is necessary to burn dry wood in any type of appliance.

So basically if you haven’t already started collecting your wood for this coming winter do it now.  Seasoning firewood may take around 3 years for some wood, so start early and save yourself from the risk of a chimney fire.

Check out this video on showing you an interesting way how to stack firewood and start seasoning firewood:

Follow us on Facebook for Chimney Liner Sales

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Do you want chimney liner sales that are not available to everyone?  Would you like free upgrades?  Do you want a chance to win a FREE cleaning kit?  Follow us on Facebook, we will almost always have a sale or an offer of some type only advertised on our Facebook page, Click Here.

Right now we have special chimney liner sales on….well you will have to go check us out.  It is the best sale on internet right now for a stainless steel chimney liner.  Let us know what you would like to have on sale.  Show us pics of your installs.  Show us before and after pics.  Ask for tech help.  Or just tell us how you are doing.  We love hearing from our customers, this way we can know where we can improve and where we are exceeding.

Visit Chimney Liner Depot now on Facebook to check out the latest chimney liner sales.

special offer chimney liner, chimney liner sale

Chimney Restoration with a Chimney Liner


If your chimney flue is deteriorating your chimney may be dangerous. If you have cracked flue tiles or missing flue tiles your venting system may be allowing dangerous gases to enter your home. What can you do about this? How can you repair a deteriorating chimney without a complete chimney re-build?

You’ve come to the right place for solving your chimney flue problems. Chimney Liner Depot manufactures flexible and rigid chimney flue liners which are designed to reline existing masonry chimneys. Basically a stainless steel chimney flue liner is designed to replace the clay flue tiles in your chimney. Keep in mind a chimney liner is not a chimney system. It’s an insert for your chimney.

We carry a full line of UL Listed flexible and rigid chimney flue liners. Call us today for help with your project. 1-866-941-5112

Chimney Liner Metals


If you are considering buying a flexible or rigid chimney liner you should know a few things about the metals used in high quality chimney liners. First off, Chimney Liner Depot only sells liners made from the highest quality stainless steel available.

What you want in a chimney liner

For wood burning appliances/stoves 304L stainless steel is all you need. This is most commonly found in rigid chimney liners. Rigid chimney liners also come in 316L which is used for oil and gas applications. High quality flexible chimney liners should be made from 316TI stainless steel. Make sure to remember this, it’s important. Our liners are made from the highest quality stainless steel. Our pricing is also incredibly competitive because our liners are manufactured in-house. We control the production costs and pass the savings on to you.

Do your homework when buying a chimney liner. Make sure you are getting quality stainless steel. There are a lot of bargain brands available online. Your home and family deserve the best. Call us today at 1-866-941-5112 and let us help you get your chimney liner product underway.

Factory Direct Chimney Liners


When you buy a chimney liner from you are buying factory direct. Our chimney liners are priced low, but the quality is high. We can afford to sell our chimney liners at the prices we do because we control the production costs. We use the highest quality alloys for our chimney liners.

flexible chimney liner


If you need a chimney liner, don’t waste your time and money searching the internet for a ‘Killer Deal’. Rest assured, if you find a stainless steel chimney liner for a better price than we offer you are most likely getting an inferior product. Remember you get what you pay for. At first glance all chimney liners look the same. But when it comes down to it, our liners are made of the highest quality stainless steel. Our chimney liner kit components are of the highest quality as well. We go the extra mile for the sake of quality.

When you buy a chimney liner from you are getting a product designed to last a lifetime. If for any reason you should need to file a warranty claim, you can rest easy knowing that it will be a painless process.

Burning wood in your chimney


Here is a nice video which talks about seasoned firewood. It’s not good to burn wet wood. It will create creosote build-up. Creosote build-up is not good. It can lead to a chimney fire if left unattended. If you have a stainless steel chimney liner in your chimney you still need to clean your wood burning chimney regularly. If you have a corrugated chimney liner the build-up can be more extensive.

Wet wood will burn. It will just burn poorly. It will produce a lot of smoke, and won’t produce as much heat as it should. Many people like to turn dampers down at night so that the fire doesn’t go out while they sleep. This is really a bad idea if you want to keep creosote build-up down.



Did your heating season start late?


This year across much of the North East the cold weather/heating season started a little late. Last years heating season was also relatively mild. This caused many homeowners to use their heating systems a lot less. This meant them believing that they did not need to have their chimneys serviced.

Despite how much you use your chimney during a season, you should have it inspected/cleaned yearly. Over the summer months many different things can happen.

You may have decided this year to install a wood burning insert or pellet stove as many homeowners have. Did you know that you are required by the manufactures and national codes to install a chimney liner with each wood burning insert, no matter what condition your chimney is in.

Chimney Liner Depot has the best selection of chimney liners on the market. Call us today to speak with a technician who can help you with your chimney liner installation.

Chimney Liner Depot End of Year Sale


Chimney Liner Depot is running a huge sale to reduce inventory before the end of the year. 20% off all flexible liner kits. Now is the time to get the bests prices anywhere on a high quality chimney liner. Don’t wait because the sale is over once our inventory is reduced. Liners are going fast, so give us a call today.

Chimney liners, everywhere online, which one should you buy


We are obviously going to say you should buy a liner from Why do we say that? Well to make it simple, you are getting manufacturer direct chimney liners when you go with It’s really simple, you are getting top of the line quality chimney liners and chimney liner components. You are getting these high quality chimney liners at factory direct pricing.

Why deal with a distributor when buying a chimney liner when you can buy direct

It’s like buying a car directly from the Ford factory. If you could buy directly from Ford you would be getting the same prices dealers get. It would be a no brainer, you would save thousands right off the bat.

Buying a chimney liner directly from the factory is a no brainer. Give us a call today and save big, and get the highest quality liners you will find anywhere, made 100% in the USA.

Black Friday Chimney Liner Deals


Make sure to check out Chimney Liner Depot on Black Friday. We are going to have a great sale. Now is the time to buy a chimney liner. Don’t wait any longer. Before you know it the snow will be here. The weather is perfect for installing a chimney liner. Our stainless steel chimney liners are the best in the industry. Our chimney liners are made from the best materials and made right here in the United States.

Rigid Chimney Liner for wood stove


If you are thinking about relining your chimney with a stainless steel chimney liner, you should seriously consider lining it with a rigid chimney liner. A rigid chimney liner is nothing more than a stainless steel pipe. It is not flexible and comes in sections that you connect during installation. It provides a glass smooth chimney liner that will make it very difficult for creosote to build up if you are burning wood. Creosote build-up is bad, but unavoidable. If you reline your chimney, you can keep the creosote build-up to a minimum. Call us today to find out how affordable a diy rigid chimney liner installation is.

Chimney Liners Love Cold Weather


It’s starting to get cold again. That means firing up the furnace or stove. You may not have used your chimney a whole lot last year, but that doesn’t mean you shouldn’t have it inspected and or cleaned. You may find that you are in need of a metal chimney liner. There are various reasons why you may need a chimney liner installed in your chimney. Check out our site for more information as to why this may be so. We have the best prices on the highest quality chimney liners. Remember that quality is very important when dealing with a chimney. Make sure to do your homework. When you are done you will see that Chimney Liner Depot is the best place to buy a flexible or rigid stainless steel chimney liner system.

Fireplace chimney liner


Here is a great article on relining a fireplace chimney. Relining a fireplace chimney is a common chimney relining project.

Why buy a chimney liner from us?


-We have the highest quality chimney liners and components in the business
-Highest Grade Stainless Steel – 316 TI (ti stands for titanium)
-Factory Direct Pricing
-Factory-Backed Warranty
-Expert Support
-Made in the USA
-Large Selection
-Fast Shipping


These are just a few reasons why you should buy a chimney liner from Chimney Liner Depot. We manufacture our chimney liners on state of the art equipment. We only use the best stainless steel on all our chimney liners and chimney liner components. This includes all models of our chimney liners. We make two kinds of flexible chimney liners, as well as rigid chimney liner. It’s the season for installing chimney liners. Do yourself a favor and buy a chimney liner from chimney liner depot.

What is a chimney liner?


A chimney liner is design to be installed in an existing chimney. Prefab chimneys and masonry chimneys are existing chimneys that can have chimney liner installed in them. A chimney liner is not to be confused with an actual chimney. Masonry chimneys usually have clay flue tiles. These flue tiles can break down over time. Different factors can contribute to this break down. A rigid or flexible stainless steel chimney liner is designed to be inserted in the chimney replacing the function of the clay flue liner.

It’s fall, it’s time to look at your chimney


Every year during the fall season there is a sudden increase in chimney liner sales. Most people start thinking about chimneys during the fall months. It certainly is the season to inspect your chimney and if needed, install a chimney liner. There are two types of stainless steel chimney liners that can be installed. A rigid chimney liner is by the best stainless steel chimney liner that you can install in your chimney. For more information about stainless steel rigid chimney liners click here. Rigid chimney liners are good in situations where the masonry chimney does not have any bends in it. If the masonry chimney does have bends then a flexible stainless steel chimney liner is the next best option. Click here for more information about flexible stainless steel chimney liners.

Why Insulate your chimney liner


Here is a link that talks about chimney liner insulation. Why it is important to insulate your chimney liner. Is insulating a chimney required to maintain a UL Listing?

Class A Stainless Steel Chimney System


Check out this great information on a class a chimney system.

Chimney Chase Cover


What is a chase cover? A chase cover is a metal covering of a chimney chase. The chimney chase can be made of wood which would house a Class A Chimney system or it can be considered a masonry structure. Most masonry chimneys are protected on top by a masonry crown. This deflects water and protects the actual brick or block of the chimney.

Stainless steel chimney chase covers are a good way to protect a wood chase. A lot of chimney chases were built over the years with a galvanized or painted steel chase cover on top for protection. Over time these chase covers started to rust out. The best way to solve this problem or eliminate it on new construction is to install a stainless steel chimney chase cover.

Chimney Liner Depot has an in-house chase cover department that can custom manufacture any chimney chase cover that you may need. We can make them out of a variety of materials, but the most cost efficient and long lasting solution is a stainless steel chimney chase cover.

Give us a call today at 1-866-286-1062 to order your chimney chase cover. It’s is a simple process. We will ask you for a few dimensions and get to work on your custom chimney chase cover. Shipping is fast, and the warranty is forever. Your chase cover is guaranteed never to rust.

Click here for a quick price quote on your custom chimney chase cover.

Flexible Chimney Flue Pipe can Bring New Life to Your Chimney


The chimney liner is the ultimate solution to the problems that plague most chimneys. Modern stainless steel provides air tight and water tight barrier that seals in gases and creosote. Underwriters Laboratory declared that flex systems excel standards for chimney safety and can even withstand a chimney fire and still maintain structural integrity.

This system is to be installed in all new or existing masonry chimneys that are used for the natural draft venting of gas, liquid, and solid fuel fired residential type appliances and masonry fireplaces. While extreme care has been taken to make the system as safe as possible, proper installation, operation and maintenance should be followed.

316TI Stainless Steel is the Best Stainless Steel for Chimney Liners
316TI is a stainless steel alloy with a small amount of titanium added. It’s make-up allows it to resist acids and the stresses of hot and cold cycles. It can be used with solid fuels (wood, coal and pellet), gas and oil. It can withstand temperatures up to 2100 degrees.

If your masonry chimney is suffering from problems due to a newer appliance, the solution is to install a stainless steel chimney liner.

Stainless Steel Chimney Liner Pipe


What is stainless steel chimney pipe? Most masonry chimneys have a terra-cotta chimney flue liner inside the brick or block exterior of the chimney. Todays appliances can cause serious problems for masonry chimneys. Because of this, stainless steel chimney pipe is used to reline the masonry chimney. This stainless steel chimney pipe provides a protection to the masonry chimney.

Without the stainless steel chimney pipe inside the masonry chimney, there are usually problems. Acidic residue and excessive moisture break down masonry. When this happens cracks can form which can allow toxic gases to enter the home. When deterioration starts taking place in a masonry chimney blockages can form in the chimney. Blockages in a chimney can spell disaster for a home and those who live inside it.

On of the best solutions for a deteriorating chimney flue liner is a stainless steel chimney pipe. Chimney Liner Depot sells the best stainless steel chimney pipes on the market today. Give us a call for assistance with your next chimney relining project. Call now – 1-866-286-1062

Pellet Stove Chimney Liner


Do pellet stoves need chimney liners? If you have an existing chimney that you would like to vent a pellet stove into you should install a stainless steel chimney liner. Why? In order for an appliance to run correctly it should vent into a chimney or pipe that is sized correctly. Most pellet stoves have 3 inch vent sizes. When installing a chimney liner for a pellet stove there is one thing to remember. If the chimney length is greater than 15 feet you should just up to a 4 inch chimney liner. In this case you will need to go from the 4 inch chimney liner tee down to 3 inch.

Click here to purchase a chimney liner for a pellet stove.

Oil Furnace Chimney Liner


The incomplete by-product of combustion of fuel oil is unburned carbon & sulfur dioxide simply known as “oil soot”… Oil soot accumulates on the walls and at the base of the chimney, which warrants it be inspected and cleaned annually as suggested in the National Fire Protection Association’s 211-CODE.  All though this is not a law, and the code has not been adopted in some states, the code was designated to help homeowners safeguard their home heating unit and contents from “puff-back” which can create an oil mist that settles throughout the home resulting costly professional cleanup.

A big misconception on many homeowners’ part is that the oil service company takes care of the chimney. The oil burner company may shovel out the base of a brick chimney and brush out the connector pipes, but they will not clean the chimney. Most furnace technicians fail to mention anything about the chimney leading homeowners to believe everything is fine. Some oil furnaces service men even tell the homeowner that the chimney is OK without inspecting the entire chimney, which includes going to the roof and inspecting the interior as well as the exterior masonry (if applicable), flashing, chimney cap, etc.

The National Fire Protection Assoc. 211 codes state that “chimneys must be inspected and cleaned as necessary annually” – just like the oil service man services the furnace annually, so should the chimney system be serviced annually. Many homeowners also may not be aware that the chimney’s interior, when not maintained, will decay and break down. For example – just like neglecting your teeth and not having them checked annually may result in cavities. (Or if you don’t change the motor oil in your car for 50,000 miles, you can be sure something in the motor will breakdown.) It’s the same theory with your chimney. As stated earlier, the incomplete by product of combustion is soot, which contains carbon and sulphur. Sulphur, when mixed with rain water (from a missing rain cap) or moisture from the flue gases themselves is absorbed into the flue tile and starts a deteriorating process called flaking or spalling. Just like tartar on your teeth, annual brushing will remove these soot deposits and keep the deterioration process to a minimum.

In metal chimneys the interior lining is made from single-ply or 2-ply stainless steel, which will not rust, but will corrode from the oil soot’s sulfuric acid reaction over time if not cleaned annualy. This corrosion makes small pinholes, which will ruin the integrity of the liner, which will not be able to hold the by-products of combustion. When a clay lining in a masonry chimney flakes or a metal chimney’s insides corrode, they are unable to contain the heat and the flue gases, thus creating a potential fire and health hazard.

Reline your oil furnace chimney flue with the best chimney liner available today. Reline your chimney with a Flex King Chimney Liner. Remember that once a chimney liner is installed in an oil furnace chimney flue, that you must maintain it annually. It still needs to be cleaned even though there is a stainless steel chimney liner installed.