Square Stainless Steel Flue Lining Kits
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Square Stainless Steel Flue Lining Kits
Square Chimney Liner Kit
Product Details
Help & Documents
Applications for Stainless Steel Square Chimney Liners
Square flexible chimney liners can be installed inside a masonry chimney for the applications listed below.
Fuel Types:
- Wood and wood pellet fuel
- Gas fuel
- Oil fuel
- Coal
Square Chimney Liner Replacement Examples:
Square chimney liners can be used to vent these examples listed below and include a bottom connector to adapt to a round exhaust outlet. Typically, square chimney liners are used when the properly sized round liner will not fit.
- Fireplace inserts
- Wood stoves
- Traditional masonry fireplaces
- Furnaces
- Boilers
- Water heaters
*Always check the manual for the appliance you are venting regarding venting requirements
Details and Features
The Rock-Flex Square Chimney Liner Kit is fabricated from our original & signature chimney liner for basic installations, you can't go wrong with this choice. With 7 ply seams and 10 corrugations per seam, it is a very durable liner that is air and water tight. As a matter of fact, you can stand on this stainless liner and it will not crease.
Additionally, the 316Ti Stainless Steel Square Chimney Liner is an all-fuel liner including wood, pellet, gas, oil, coal. 316Ti features a unique titanium alloy designed to resist flue acids and the extreme stresses of hot and cold cycles. It can withstand multiple heating cycles up to 2100 degrees (U.L. 1777).
- 316Ti Stainless Steel
- Several square size options - Square Chimney Liner Conversion Chart
- Designed to resist flue acids and extreme temperatures
- Fully customize your chimney liner kit in four easy steps
- UL Tested and Listed
- Category 1 / Residential
- Lifetime Warranty
- Free Shipping
- Complete installation instructions - Most installations will take no more than 2 to 3 hrs. No rivets or clamps required.
- Customer Support from Rockford's Certified Technicians
Do I Need a Square Chimney Liner?
One of the most frequently asked questions, do I actually NEED a square chimney liner? There are a few scenarios where the square chimney liner is the best product to install. We explain a few scenarios below and also have a handy Chimney Liner Size Calculator for you to use.
Firstly, the square chimney liner can be a lifesaver in tight installations that don't have enough room for the properly sized round chimney liner. For example, if you have a furnace that requires a 6" chimney liner, but your current inside flue tile measures 6 1/4" x 6 1/4", you may need to choose a properly sized square chimney liner.
Secondly, if you have a wood stove and need to insulate the chimney liner, but not enough room in your current flue, a square chimney liner may be a good solution. For example, you need a 6" chimney liner with insulation and the O.D. will be ~7 3/4". If the current flue I.D. measures 7 3/4" x 7 3/4", that is too tight for a round liner.
Lastly, you may also consider breaking out the clay tiles to install the properly sized chimney liner (round or square) with insulation. We have a rental tile breaking tool available here.
Please contact us to go over your installation & we'll help you figure out the best option!
Note: Square chimney liners and components are custom made to your specifications, and are not refundable. Even if your chimney flue is not round, in some circumstances a round liner will better meet your needs. Round liners are more cost-effective and easier to install. Please call us if you have any questions in regards to your installation!
Measuring & Installing Your Square Chimney Liner Kit
Measuring for your stainless steel square chimney liner is one of the most important steps. Specifically, measure the exact inside measurements of the chimney flue or brick chimney, this will ensure the chimney liner will fit down your masonry flue.
Be sure the proper size liner, sized to the appliance you are connecting to, will fit down your current masonry chimney.
- Here is a link to our helpful measuring guides
- Here is a link to our Chimney Liner Size Calculator
- Additionally, view our easy-to-follow chimney liner installation video.
How to Order a Square Chimney Liner Kit
Customize your Stainless Steel Square Chimney Liner Kit step by step with our easy ordering menu. Included in your chimney liner kit:
Step 1: Flexible Stainless Steel Chimney Liner
316Ti Stainless Steel Square Chimney Liner - Air and water tight, with 7 ply seams and 10 corrugations per seam for the very best durability and strength on today's market. Additionally, rated number one in the industry for ease of installation and strength. UL Listed and made of the highest quality, hand picked stainless steel made in the United States. Fuels include gas, oil, wood, pellet, and coal.
To begin with, select the proper size square dimensions that will properly vent the appliance you are connecting to. If you need assistance sizing, contact one of Rockford's Certified Technicians and we will be happy to assist. Here is a link to the helpful Square Chimney Liner Conversion Chart.
Note: The sizes give in the menu are outside dimensions.
Next, select the proper length for the chimney height. We fabricate each liner per foot. You will want to round up to the nearest foot.
Optional Insulation
One of the most frequently asked questions is "Do I Need to Insulate My Chimney Liner?". Most often, for solid fuels, the answer is yes and typically required. On the other hand, for gas and oil, it's recommended, but not always required. Here are a few articles we've written to help you understand chimney liner insulation requirements.
- Is Chimney Liner Insulation Required?
- Should My Chimney Be Relined AND Insulated?
- Benefits of Chimney Liner Insulation
- Features of Chimney Liner Insulation
Step 2: Bottom Connector
Secondly, you will select the Bottom Connector, which will connect the flexible chimney liner to the appliance. Not only is our Quick-Connect system extremely secure, but also easy to install. In general, there are three different styles of Bottom Connectors.
The first option is a Two-Part Tee Connector. Use the Tee Connector to connect horizontally to the appliance or to the connector pipe inside the room. This is a two-part Tee Connector with a removable snout. The Tee Body (vertical part) will be square to fit the flexible chimney liner. The Removable Snout (horizontal part) will be round to fit the appliance. Tee Connector Installation Video
The second option is a Vertical Appliance Connector. Use the Vertical Appliance Connector to connect directly to the top of the appliance. The top (female end) of the connector will be square to fit the flexible chimney liner. The bottom (male end) of the connector will be round to fit into your appliance.
The third option is a Bottom Plate. Use the Bottom Plate to terminate the square chimney liner inside a masonry fireplace. The Bottom Plate should be parged into place using Chamber Safe material, above the smokeshelf, where the flue begins. The Mesh Bottom Plate is suggested for smaller gaps between the flue and the liner. The Standard Bottom Plate is used for filling large gaps between the flue and the new chimney liner.
You will find an application summary for each Bottom Connector in the dropdown menu.
Step 3: Top Plate
Thirdly, you will select a Top Plate size which will terminate and secure the square chimney liner in place at the top of the chimney. Choose the size & style top plate that will fit your chimney flue tile or brick opening. Above all, with our extremely secure Quick-Connect system, installation will be a breeze.
You will find an application summary for each Top Plate in the dropdown menu. See our Top Plate Options Overview Video for additional information.
Step 4: Rain Cap
Lastly, select a Rain Cap to place over the collar on the Top Plate. This will protect & keep critters, debris, and weather out of the chimney flue. Easy to install and extremely secure with our Quick-Connect system. Not only does the Round Rain Cap feature a mesh screen, but it also has a wind guard to protect against downdrafts.
Add to Cart
Add the product to your cart to view pricing and summary of the chimney liner kit build.
Need More Help?
Contact one of Rockford's Certified Technicians today to help answer your questions and assist in planning your installation. Our Technicians are CSIA and NFI Certified; ready to take your call, email, or text.
Why Choose Rockford's Stainless Steel Square Chimney Liner
We offer the best protection for you and your home. Air and water tight chimney liners, seven ply seams that lock moisture and flue gases in the flexible flue liner which keeps them from leaking into the home.
Guards Against Corrosion - Certified Rock-Flex stainless steel chimney liners protect against hostile acids which deteriorate masonry clay tile chimneys.
What About Creosote? - Rockford chimney flue liners do not allow creosote to leach through the liner unlike masonry, clay tile flues, or liners not made of prime stainless. Creosote can catch fire, thanks to Rock Flex this harmful creosote is minimized.
Seals Off Carbon Monoxide - When it comes to safety our flexible chimney liners will protect the structure of your home from moisture damage and the very real potential of carbon monoxide poisoning.
UL Listed in the USA and CANADA - Our stainless steel flue liners and components are UL tested and listed to UL1777 standard, Underwriter Laboratories. UL is the leader and most recognized in the United States, don't settle for less.
Lifetime Transferable Warranty - The best warranty anywhere, transferable to new homeowner if you decide to sell. You're going to feel good about this purchase, plus you're adding value to your home.
316Ti Liners - A unique titanium alloy designed to resist flue acids and the extreme stresses of hot and cold cycles. It can withstand multiple heating cycles up to 2100 degrees.
Rockford carries a complete selection of chimney liner supplies. Our hearth liner kits and components are premium stainless-steel and 100 percent manufactured in the USA. Buy chimney liners online at Rockford Chimney Supply and you are guaranteed to be getting the best chimney liner replacement system available. Our service, price, & quality is unmatched, anywhere.
With attention to Canadian customers, please use our US Border Depots to save on shipping.
Product Details:
Applications for Stainless Steel Square Chimney Liners
Square flexible chimney liners can be installed inside a masonry chimney for the applications listed below.
Fuel Types:
- Wood and wood pellet fuel
- Gas fuel
- Oil fuel
- Coal
Square Chimney Liner Replacement Examples:
Square chimney liners can be used to vent these examples listed below and include a bottom connector to adapt to a round exhaust outlet. Typically, square chimney liners are used when the properly sized round liner will not fit.
- Fireplace inserts
- Wood stoves
- Traditional masonry fireplaces
- Furnaces
- Boilers
- Water heaters
*Always check the manual for the appliance you are venting regarding venting requirements
Details and Features
The Rock-Flex Square Chimney Liner Kit is fabricated from our original & signature chimney liner for basic installations, you can't go wrong with this choice. With 7 ply seams and 10 corrugations per seam, it is a very durable liner that is air and water tight. As a matter of fact, you can stand on this stainless liner and it will not crease.
Additionally, the 316Ti Stainless Steel Square Chimney Liner is an all-fuel liner including wood, pellet, gas, oil, coal. 316Ti features a unique titanium alloy designed to resist flue acids and the extreme stresses of hot and cold cycles. It can withstand multiple heating cycles up to 2100 degrees (U.L. 1777).
- 316Ti Stainless Steel
- Several square size options - Square Chimney Liner Conversion Chart
- Designed to resist flue acids and extreme temperatures
- Fully customize your chimney liner kit in four easy steps
- UL Tested and Listed
- Category 1 / Residential
- Lifetime Warranty
- Free Shipping
- Complete installation instructions - Most installations will take no more than 2 to 3 hrs. No rivets or clamps required.
- Customer Support from Rockford's Certified Technicians
Do I Need a Square Chimney Liner?
One of the most frequently asked questions, do I actually NEED a square chimney liner? There are a few scenarios where the square chimney liner is the best product to install. We explain a few scenarios below and also have a handy Chimney Liner Size Calculator for you to use.
Firstly, the square chimney liner can be a lifesaver in tight installations that don't have enough room for the properly sized round chimney liner. For example, if you have a furnace that requires a 6" chimney liner, but your current inside flue tile measures 6 1/4" x 6 1/4", you may need to choose a properly sized square chimney liner.
Secondly, if you have a wood stove and need to insulate the chimney liner, but not enough room in your current flue, a square chimney liner may be a good solution. For example, you need a 6" chimney liner with insulation and the O.D. will be ~7 3/4". If the current flue I.D. measures 7 3/4" x 7 3/4", that is too tight for a round liner.
Lastly, you may also consider breaking out the clay tiles to install the properly sized chimney liner (round or square) with insulation. We have a rental tile breaking tool available here.
Please contact us to go over your installation & we'll help you figure out the best option!
Note: Square chimney liners and components are custom made to your specifications, and are not refundable. Even if your chimney flue is not round, in some circumstances a round liner will better meet your needs. Round liners are more cost-effective and easier to install. Please call us if you have any questions in regards to your installation!
Measuring & Installing Your Square Chimney Liner Kit
Measuring for your stainless steel square chimney liner is one of the most important steps. Specifically, measure the exact inside measurements of the chimney flue or brick chimney, this will ensure the chimney liner will fit down your masonry flue.
Be sure the proper size liner, sized to the appliance you are connecting to, will fit down your current masonry chimney.
- Here is a link to our helpful measuring guides
- Here is a link to our Chimney Liner Size Calculator
- Additionally, view our easy-to-follow chimney liner installation video.
How to Order a Square Chimney Liner Kit
Customize your Stainless Steel Square Chimney Liner Kit step by step with our easy ordering menu. Included in your chimney liner kit:
Step 1: Flexible Stainless Steel Chimney Liner
316Ti Stainless Steel Square Chimney Liner - Air and water tight, with 7 ply seams and 10 corrugations per seam for the very best durability and strength on today's market. Additionally, rated number one in the industry for ease of installation and strength. UL Listed and made of the highest quality, hand picked stainless steel made in the United States. Fuels include gas, oil, wood, pellet, and coal.
To begin with, select the proper size square dimensions that will properly vent the appliance you are connecting to. If you need assistance sizing, contact one of Rockford's Certified Technicians and we will be happy to assist. Here is a link to the helpful Square Chimney Liner Conversion Chart.
Note: The sizes give in the menu are outside dimensions.
Next, select the proper length for the chimney height. We fabricate each liner per foot. You will want to round up to the nearest foot.
Optional Insulation
One of the most frequently asked questions is "Do I Need to Insulate My Chimney Liner?". Most often, for solid fuels, the answer is yes and typically required. On the other hand, for gas and oil, it's recommended, but not always required. Here are a few articles we've written to help you understand chimney liner insulation requirements.
- Is Chimney Liner Insulation Required?
- Should My Chimney Be Relined AND Insulated?
- Benefits of Chimney Liner Insulation
- Features of Chimney Liner Insulation
Step 2: Bottom Connector
Secondly, you will select the Bottom Connector, which will connect the flexible chimney liner to the appliance. Not only is our Quick-Connect system extremely secure, but also easy to install. In general, there are three different styles of Bottom Connectors.
The first option is a Two-Part Tee Connector. Use the Tee Connector to connect horizontally to the appliance or to the connector pipe inside the room. This is a two-part Tee Connector with a removable snout. The Tee Body (vertical part) will be square to fit the flexible chimney liner. The Removable Snout (horizontal part) will be round to fit the appliance. Tee Connector Installation Video
The second option is a Vertical Appliance Connector. Use the Vertical Appliance Connector to connect directly to the top of the appliance. The top (female end) of the connector will be square to fit the flexible chimney liner. The bottom (male end) of the connector will be round to fit into your appliance.
The third option is a Bottom Plate. Use the Bottom Plate to terminate the square chimney liner inside a masonry fireplace. The Bottom Plate should be parged into place using Chamber Safe material, above the smokeshelf, where the flue begins. The Mesh Bottom Plate is suggested for smaller gaps between the flue and the liner. The Standard Bottom Plate is used for filling large gaps between the flue and the new chimney liner.
You will find an application summary for each Bottom Connector in the dropdown menu.
Step 3: Top Plate
Thirdly, you will select a Top Plate size which will terminate and secure the square chimney liner in place at the top of the chimney. Choose the size & style top plate that will fit your chimney flue tile or brick opening. Above all, with our extremely secure Quick-Connect system, installation will be a breeze.
You will find an application summary for each Top Plate in the dropdown menu. See our Top Plate Options Overview Video for additional information.
Step 4: Rain Cap
Lastly, select a Rain Cap to place over the collar on the Top Plate. This will protect & keep critters, debris, and weather out of the chimney flue. Easy to install and extremely secure with our Quick-Connect system. Not only does the Round Rain Cap feature a mesh screen, but it also has a wind guard to protect against downdrafts.
Add to Cart
Add the product to your cart to view pricing and summary of the chimney liner kit build.
Need More Help?
Contact one of Rockford's Certified Technicians today to help answer your questions and assist in planning your installation. Our Technicians are CSIA and NFI Certified; ready to take your call, email, or text.
Why Choose Rockford's Stainless Steel Square Chimney Liner
We offer the best protection for you and your home. Air and water tight chimney liners, seven ply seams that lock moisture and flue gases in the flexible flue liner which keeps them from leaking into the home.
Guards Against Corrosion - Certified Rock-Flex stainless steel chimney liners protect against hostile acids which deteriorate masonry clay tile chimneys.
What About Creosote? - Rockford chimney flue liners do not allow creosote to leach through the liner unlike masonry, clay tile flues, or liners not made of prime stainless. Creosote can catch fire, thanks to Rock Flex this harmful creosote is minimized.
Seals Off Carbon Monoxide - When it comes to safety our flexible chimney liners will protect the structure of your home from moisture damage and the very real potential of carbon monoxide poisoning.
UL Listed in the USA and CANADA - Our stainless steel flue liners and components are UL tested and listed to UL1777 standard, Underwriter Laboratories. UL is the leader and most recognized in the United States, don't settle for less.
Lifetime Transferable Warranty - The best warranty anywhere, transferable to new homeowner if you decide to sell. You're going to feel good about this purchase, plus you're adding value to your home.
316Ti Liners - A unique titanium alloy designed to resist flue acids and the extreme stresses of hot and cold cycles. It can withstand multiple heating cycles up to 2100 degrees.
Rockford carries a complete selection of chimney liner supplies. Our hearth liner kits and components are premium stainless-steel and 100 percent manufactured in the USA. Buy chimney liners online at Rockford Chimney Supply and you are guaranteed to be getting the best chimney liner replacement system available. Our service, price, & quality is unmatched, anywhere.
With attention to Canadian customers, please use our US Border Depots to save on shipping.
Help & Documents:
DIY Center
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From video tutorials to product walkthroughs, we have a variety of DIY resources just for you! Click the button below to view our entire library.
Our 316Ti flexible chimney liner and chimney liner components have passed the rigorous testing at the Underwriters Laboratories with best in class status and are UL Listed. So if you are looking for UL listed chimney liner sold directly to homeowners, then look no further than Rockford Chimney
