Oval Stainless Steel Chimney Liner Kits - Flexible Oval Flue Lining Kit

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Applications for Stainless Steel Oval Chimney Liners

Oval 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

Oval Chimney Liner Replacement Examples:

Oval chimney liners can be used to vent these examples listed below and include a bottom connector to adapt to a round exhaust outlet. Typically, oval 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 Oval 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 Oval 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 oval size options - Oval 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 an Oval Chimney Liner?

One of the most frequently asked questions, do I actually NEED an oval chimney liner? There are a few scenarios where the oval 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 oval 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 an 8" chimney liner, but your current inside flue tile measures 7 3/4" x 10 3/4", you may need to choose a properly sized oval chimney liner.

Secondly, if you have a wood stove and need to insulate the chimney liner, but not enough room in your current flue, an oval 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 10 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 oval) 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: Oval 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 Oval Chimney Liner Kit

Measuring for your stainless steel oval 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 an Oval Chimney Liner Kit

Customize your Stainless Steel Oval 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 Oval 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 oval 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 Oval Chimeny 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.

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 oval 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 oval 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 oval 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 oval 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 extemely 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. Lead time 1-4 weeks.

Why Choose Rockford's Stainless Steel Oval 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.

Complete Installation Instructions

Videos & Calculators: How to Install a Chimney Liner

"DIY chimney liners installed the easy way." Most installations will take no more than 2 to 3 hrs. No rivets or screws required. Chimney liner installation instructions.

Lifetime Forever transferable chimney liner warranty.

316Ti Stainless steel fireplace liners are used with fuel types such as wood, pellet, gas, oil, and coal.

Each Rockford Oval Chimney Liner Kit Includes:

316Ti Stainless Steel Oval Chimney Liners - Air and water tight, with 7 ply seams and 10 corrugations per seam for the very best flexibility and strength on today's market. Rated number one in the industry for strength and flexibility. UL Listed and made of the highest quality, hand picked, prime stainless steel made in the United States.
Oval Rain Cap - Quick connect rain cap with a screen enclosure to keep critters and debris out. The rain cap has a wind guard to protect against downdrafts.
Connectors - Quick connecting tee with a removable horizontal snout for easy installation through your chimney thimble. Or a quick connecting liner to stove vertical appliance connector. (If you're connecting vertically to the top of your appliance you will most likely need the liner to stove connector. If you're connecting or exiting the chimney horizontally you will most likely need the tee and tee clean out.) Also available among the options is a bottom plate if you are transitioning the liner to a traditional masonry fireplace without an appliance. Simply make your choice using the drop down window in Step 2.
Top Plate - Choose from a perfect fitting Quick Connect terra-cotta top plate or flat top plate. The terra-cotta top plate features pressure fitting screws for a secure and easy installation. Simply make your choice using the drop down window in Step 3.
Complete installation instructions - DIY stainless steel metal chimney liners installed the easy way! Most installations will take no more than 2 to 3 hrs. No rivets or clamps required.
Warranty - Lifetime Forever transferable chimney liners warranty.
Support - Free 6 days a week toll free phone support.
Looking for Insulation size? View our Oval Liner Insulation Sizing Chart.

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