13 Best 6-Inch Oval Stainless Chimney Liner Kits for Tight Flues: Our Top Picks of 2025

If you’re looking for the best 6-inch oval stainless chimney liner kits for tight flues in 2025, I recommend checking out options like the chimney liner kits with flexible construction specifically designed for confined spaces, sturdy stainless steel caps, and precise adapters for a secure fit. Long-lasting durability, weather resistance, and ease of installation are key features to contemplate. Keep exploring, and you’ll discover more top picks tailored for your needs.

Key Takeaways

• Ensure the liner kit features high-quality 304 or 316 stainless steel for durability and corrosion resistance in tight flues.
• Confirm compatibility with oval or irregular-shaped flues, and check for flexible or adaptable installation options.
• Look for kits including necessary components like flashing, rain cap, and connectors for a complete, weatherproof setup.
• Prioritize systems rated for high temperatures and long-lasting performance, suitable for gas, wood, or solid fuel appliances.
• Review customer feedback and warranties to gauge ease of installation, reliability, and long-term maintenance in tight chimney spaces.

Chimney Liner Kit, 6 Dia, 25 ft. L

If you need a reliable venting solution for natural gas appliances in tight chimney spaces, the Chimney Liner Kit, 6 Dia, 25 ft. L is an excellent choice. It features a flexible, durable aluminum liner rated for temperatures up to 500°F, making installation easier in confined spaces. The kit includes essential accessories like flashing, rain cap, B-vent connector, and mortar sleeve, ensuring a complete setup. With a 6-inch diameter and 25-foot length, it supports venting up to 45 feet. Designed specifically for natural gas, it offers a safe, efficient, and cost-effective solution for residential or commercial chimney applications.

Best For: homeowners and HVAC professionals needing a flexible, reliable venting solution for natural gas appliances in tight or existing chimney spaces.

Pros:

• Flexible aluminum construction simplifies installation in confined or complex chimney layouts
• Rated for temperatures up to 500°F, ensuring safe venting of natural gas appliances
• Includes all essential components like flashing, rain cap, and mortar sleeve for a complete setup

Cons:

• Not made of stainless steel, which may concern some users regarding long-term durability
• Limited to natural gas applications only, not suitable for other fuels
• Moderate customer ratings (3.6 out of 5 stars), indicating some users experienced installation or material issues

HY-C LC6 Round Stainless Steel Clamp on Single Flue Liner Chimney Cap, 6

The HY-C LC6 Round Stainless Steel Clamp on Single Flue Liner Chimney Cap is an excellent choice for homeowners with metal chimneys, especially when a durable, corrosion-resistant cover is needed. Made from 100% 304 stainless steel, it offers excellent durability and resistance to the elements. Designed specifically for metal chimneys, it fits outside tile diameters from 5.5 to 6.5 inches. Installation is straightforward with a 1.5-inch gear-drawn clamp band. Plus, it’s made in the USA and backed by a lifetime limited warranty, giving you peace of mind that your chimney will stay protected for years to come.

Best For: homeowners with metal chimneys seeking a durable, corrosion-resistant cap that fits outside tile diameters from 5.5 to 6.5 inches.

Pros:

• Made from 100% 304 stainless steel for exceptional durability and corrosion resistance
• Easy to install with a 1.5-inch gear-drawn clamp band, suitable for DIY projects
• Backed by a lifetime limited warranty, ensuring long-term protection and peace of mind

Cons:

• Not suitable for masonry flue applications or non-metal chimneys
• Designed specifically for 6-inch outside diameter chimneys; may not fit other sizes
• May require precise measurement to ensure proper fit on compatible chimneys

Selkirk Metalbestos 6T-CT 6-Inch Stainless Steel Round Top, Pack of 1

Looking for a durable chimney cap that offers easy installation and long-lasting performance? The Selkirk Metalbestos 6T-CT 6-Inch Stainless Steel Round Top is a top choice. Made in the U.S., it features high-quality stainless steel, resisting rust and corrosion. Its flat top design securely clamps onto the chimney, ensuring a weatherproof seal. Easy to install in under 20 minutes, it fits various chimney sizes with minor modifications. Customers praise its durability, simple setup, and excellent fit, with some caps lasting over 20 years. Plus, its customizable options and warranty make it a reliable, cost-effective solution for protecting your chimney.

Best For: homeowners and DIY enthusiasts seeking a durable, easy-to-install chimney cap that provides long-lasting protection against weather elements.

Pros:

• Made from high-quality stainless steel, ensuring resistance to rust and corrosion
• Simple, quick installation typically completed in under 20 minutes
• Highly durable with some caps lasting over 20 years, offering excellent value

Cons:

• May require minor modifications, such as trimming the clamp strap, for smaller chimney diameters
• Sharp metal edges can pose a risk of injury if not smoothed prior to installation
• Packaging can sometimes be bent or slightly damaged during shipping

Vent Systems 6 Inch Stainless Steel Chimney Top Plate

For those seeking a reliable and weather-resistant foundation for their chimney components, the Vent Systems 6 Inch Stainless Steel Chimney Top Plate stands out as an excellent choice. It acts as a sturdy base for flue caps or cowls, optimizing draft and airflow in your ventilation system. Its design minimizes downdraft, preventing smoke or fumes from entering your home, while providing protection against rain, snow, and other weather elements. Made from durable stainless steel, it withstands corrosive impacts from condensate and moisture. With precise dimensions, it fits a variety of applications, including chimneys, furnaces, and stoves, ensuring long-lasting performance and enhanced system efficiency.

Best For: homeowners and professionals seeking a durable, weather-resistant base plate to enhance the safety and efficiency of their chimney or ventilation systems.

Pros:

• Constructed from corrosion-resistant stainless steel ensuring long-term durability
• Effectively minimizes downdraft and improves airflow for better system performance
• Provides a secure, weatherproof connection for flue caps and cowls, protecting against elements

Cons:

• May require precise measurements and installation skills for optimal fit
• Not suitable for chimneys with different dimensions or configurations
• Might be more expensive compared to simpler or less durable materials

6 Inch Stainless Steel Chimney Cap with Screen

A 6-inch stainless steel chimney cap with a screen is an excellent choice if you want reliable protection against debris, animals, and weather elements. The SOEKAVIA 6 Round Chimney Cap is crafted from heavy-duty 304 stainless steel, offering superior corrosion resistance and durability. Its oversized conical top and 360° grille block rain, snow, leaves, and small animals, reducing clogging and improving ventilation. Easy to install with pre-drilled holes, it fits chimneys with a 6.30-inch outer diameter. Customers praise its build quality and weatherproofing, though some note minor sizing adjustments might be necessary. Overall, it’s a solid, long-lasting solution for outdoor chimney protection.

Best For: homeowners and DIY enthusiasts seeking durable, weatherproof chimney protection for outdoor fireplaces, stoves, or vents.

Pros:

• Made from heavy-duty 304 stainless steel for superior corrosion resistance and longevity
• Easy to install with pre-drilled holes and a simple tightening process
• Effective in blocking rain, snow, leaves, and small animals, reducing clogging and improving ventilation

Cons:

• Some users report slight size discrepancies requiring gasket adjustments or modifications
• Narrow slits may accumulate soot, necessitating regular cleaning
• Lacks mounting screws included, which must be purchased separately

SELKIRK CORP 206148 6×48 Stainless Steel Pipe/Lock Band

The SELKIRK CORP 206148 6×48 Stainless Steel Pipe/Lock Band stands out as an essential component for those installing or upgrading chimney systems in tight, confined flues. Its 6-inch by 48-inch stainless steel double-wall design offers durability, corrosion resistance, and excellent insulation with solid pack insulation. The included locking band guarantees a secure fit, while the pipe’s UL listing and ability to withstand temperatures up to 2100°F assure safety and performance across various fuels. Weighing just 8 ounces, it’s lightweight yet robust, making installation easier. Overall, it’s a reliable, high-quality option for ensuring a safe and efficient chimney system in restricted spaces.

Best For: Homeowners and professionals seeking durable, high-temperature chimney pipe solutions for tight or confined flues in wood, gas, or solid fuel heating systems.

Pros:

• High-temperature resistance up to 2100°F ensures safety during brief exposure to extreme heat
• Double-wall stainless steel construction provides excellent durability and corrosion resistance
• Includes locking band for a secure fit and solid pack insulation for efficient performance

Cons:

• Slightly higher price point compared to some local options
• Some customers have reported dents or warping due to shipping mishandling
• Limited to one piece per purchase, requiring multiple units for longer runs

6 Inch Round Chimney Cap with Screen

If you’re looking to protect your chimney from debris, animals, and weather while ensuring proper ventilation, the 6 Inch Round Chimney Cap with Screen is an excellent choice. Made from thickened stainless steel, it’s waterproof, heat-resistant, and durable enough to withstand harsh conditions like rain, snow, and storms. Its tapered top design offers added strength, while the mesh screen allows smoke to escape freely and keeps out leaves, animals, and rain. Easy to install with an adjustable collar that fits chimneys from 5.9 to 6.3 inches, it provides a secure, weatherproof seal. Customers praise its fit, durability, and simple setup, making it a reliable outdoor chimney protection option.

Best For: homeowners and outdoor stove users seeking a durable, weatherproof chimney cap that ensures proper ventilation and protection from debris and animals.

Pros:

• Made from thickened stainless steel, offering waterproof, heat-resistant, and durable protection.
• Adjustable collar fits chimney pipes from 5.9 to 6.3 inches, ensuring a secure and snug fit.
• Easy to install with a tapered top design and included gloves for safe handling.

Cons:

• Customer reviews indicate variable durability, with some caps lasting only one season.
• Not compatible with double chimney pipes; designed for single pipes only.
• Slightly larger or smaller sizes may require precise measurement to ensure proper fit.

SELKIRK CORP 106800 6-Inch Round Top

For those seeking a durable and easy-to-install vent cap for natural gas or LP appliances, the Selkirk Corp 106800 6-Inch Round Top is a reliable choice. Designed for gravity draft venting, it features a round aluminum top and galvanized outer wall, rated for 100 million BTU per hour and up to 500°F. It effectively prevents rain entry and keeps out most birds with an external screen. Users praise its quick installation—simply slipping onto existing pipes—and its weather resistance. While some note the metal’s thinness, overall, it’s a cost-effective, dependable solution for venting outdoor gas appliances, with solid performance in stormy conditions.

Best For: homeowners, DIY enthusiasts, and HVAC professionals seeking an affordable, easy-to-install vent cap for natural gas or LP appliances that offers reliable rain and weather protection.

Pros:

• Easy installation by slipping onto existing pipes without bolts or welding
• Effective rain and bird entry protection with external screen
• Durable enough to withstand storm conditions and high winds

Cons:

• Metal is thin and may dent or bend during shipping or heavy weather
• Fit may be incompatible with larger pipe sizes or different dimensions
• Some users find the gauge lighter than expected, affecting perceived durability

Selkirk Stainless Steel Ceiling Support Kit (6-Inch)

Designed specifically for supporting 6-inch chimney pipes through flat ceilings and attic spaces, the Selkirk Stainless Steel Ceiling Support Kit (6-Inch) offers a reliable solution for those installing or maintaining chimneys in tight or challenging spaces. It includes essential components like a storm collar, flashing, attic insulation shield, and support package, but no pipe. Made of durable, corrosion-resistant stainless steel, it’s suitable for ceilings with pitches between 2/12 and 6/12. While installation can be tricky due to poor instructions, experienced tradespeople find it effective. Overall, it’s a solid choice for safe, professional chimney support when installed correctly.

Best For: experienced tradespeople or professional installers seeking a durable, stainless steel ceiling support kit for 6-inch chimneys passing through flat ceilings and attic spaces.

Pros:

• Made of corrosion-resistant stainless steel for durability and longevity
• Includes essential components like storm collar, flashing, and attic insulation shield for comprehensive support
• Suitable for ceiling pitches between 2/12 and 6/12, accommodating a variety of installations

Cons:

• Installation instructions are often inadequate and difficult to follow, requiring experience or professional help
• Does not include the chimney pipe, so additional components must be purchased separately
• Lacks a built-in chimney brace, which may necessitate fabricating custom support supports for some setups

DuraVent DuraPlus 6 Inch Chimney Cap

The DuraVent DuraPlus 6 Inch Chimney Cap stands out as an excellent choice for homeowners seeking reliable protection and improved efficiency for their stove chimneys. Made from triple-wall stainless steel, it offers durable weather resistance and high-temperature endurance. Its design helps retain more heat, reducing fuel costs, while the spark arrestor and rain shield minimize fire risks and extend chimney lifespan. Installation is straightforward—simply slide, twist, and secure. Rated 4.4 out of 5 stars, users appreciate its quality and ease of use, though some wish for a wider rain cap and more wind stability. Overall, it’s a cost-effective, dependable upgrade for 6-inch stove chimneys.

Best For: homeowners seeking a durable, easy-to-install chimney cap that enhances stove efficiency and safety for 6-inch chimney pipes.

Pros:

• Made from high-grade triple-wall stainless steel for durability and weather resistance
• Easy installation with a simple slide, twist, and secure process
• Improves stove performance by retaining heat and reducing fire risks

Cons:

• Some users find the metal to be thinner than expected
• Flat top design may not provide adequate wind stability in all conditions
• Limited rain cap width; some desire a wider rain shield for better protection

DuraVent DVL-ORAD Flue Pipe Adapter for Vermont Casting Appliances

If you own a Vermont Castings appliance, the DuraVent DVL-ORAD Flue Pipe Adapter is a reliable choice for creating a secure connection between your stove’s oval flue collar and round venting pipes. Made of durable stainless steel and galvanized exterior, this double-wall adapter measures 6 inches in diameter with an adjustable length, making installation flexible and straightforward. It reduces clearance from 18 inches to just 6 inches, enhancing safety and efficiency. While it offers a tight, secure fit and improves stove performance by reducing creosote buildup, some users have reported fitment issues, so verifying compatibility before purchase is essential.

Best For: those with Vermont Castings appliances seeking a durable, adjustable flue pipe adapter for safe and efficient venting.

Pros:

• Made of durable stainless steel with galvanized exterior for long-lasting performance
• Adjustable length allows flexible installation without cutting or crimping
• Significantly reduces clearance to combustibles from 18 inches to just 6 inches, enhancing safety

Cons:

• Some users report fitment issues, including mismatched sizes and difficulty fitting on certain stove models
• Compatibility is specific to Vermont Castings appliances, which may limit use with other brands
• Slight discrepancies in dimensions may require bending or additional modifications during installation

United States HDW BM0037 6 Oval Round Adapter, Black

For those working with antique or custom wood stoves, the United States HDW BM0037 6 Oval Round Adapter, Black, offers a reliable way to connect oval and round chimney pipes. This 6-inch adapter is well-made, sturdy, and fits many old and antique stove models, including Sears and Atlanta Stove Works units. While most users find it to be a close or perfect fit, some note fit issues—either too loose or too tight—requiring squeezing or sealing with stove cement. Its NPT threading ensures proper connection, making it a practical choice for shifting between oval and round pipes in vintage stove installations.

Best For: homeowners, antique stove enthusiasts, and DIYers needing a reliable oval-to-round chimney pipe adapter for vintage or custom wood stove installations.

Pros:

• Well-made and sturdy construction suitable for antique and modern wood stoves
• Compatible with a variety of stove models, including Sears and Atlanta Stove Works
• Provides a reliable transition between oval and round pipes, with options for squeezing or sealing for a secure fit

Cons:

• Fit can be slightly loose or tight, requiring adjustments like squeezing or stove cement
• Some users report fit issues with wider or fatter oval shapes in the center
• Not suitable for appliances outside of stove and chimney applications, such as dryers

Chimney Liner Kit, 4 Dia, 25 ft. L

This 4-inch diameter, 25-foot chimney liner kit is ideal for homeowners tackling natural gas appliances in tight flues. It features a flexible aluminum liner with a 24-degree bend angle, making routing easier. The kit includes essential components like flashing, rain cap, B-vent connector, and mortar sleeve, simplifying installation. Suitable for venting natural gas appliances up to 45 feet, it handles temperatures up to 500°F. Though discontinued, it remains popular for DIY projects due to its straightforward setup. Users appreciate its value and ease of use, but some note the length is slightly less than 25 feet, so extra length may be needed for certain setups.

Best For: homeowners with moderate DIY skills seeking a reliable, flexible chimney liner kit for natural gas appliances in tight or existing flues.

Pros:

• Includes all necessary components for straightforward installation, such as flashing, rain cap, and mortar sleeve.
• Flexible aluminum liner with a 24-degree bend angle facilitates easier routing in confined spaces.
• Suitable for venting natural gas appliances up to 45 feet with high-temperature capacity of 500°F.

Cons:

• The length may be slightly less than 25 feet, often around 23 feet, requiring extra length for some installations.
• The product has been discontinued by the manufacturer, which may affect availability and support.
• Some users reported the liner sheared slightly during pulling, and the cap quality is average.

Factors to Consider When Choosing 6 Inch Oval Stainless Chimney Liner Kits for Tight Flues

When selecting a 6-inch oval stainless chimney liner kit for tight flues, I focus on compatibility with your flue size to guarantee a proper fit. I also consider the material’s durability and ease of installation, especially in confined spaces. Finally, I look at insulation, heat resistance, and flexibility to make sure the liner performs well and fits smoothly into your chimney.

Compatibility With Flue Size

Choosing the right 6-inch oval stainless chimney liner kit starts with ensuring it matches your flue’s size accurately. I always recommend measuring both the width and height of your flue to get the precise oval dimensions needed. Don’t forget to check if the liner’s adapter or transition fitting is compatible with your flue’s shape and size, which helps prevent leaks or gaps. It’s important to measure the flue opening carefully, including any tapering or irregularities, to select a liner with the right clearance. Make sure the liner kit’s diameter specifications fall within your flue’s size range for a secure fit. Ultimately, verify that the liner’s compatibility details specify suitability for your flue’s material and configuration, especially in tight or non-standard flues.

Material Durability and Quality

Selecting a high-quality stainless steel liner is essential for ensuring durability and reliable performance, especially in tight flues where space constraints can amplify potential issues. I look for liners made from 304 or 316 stainless steel, as they offer excellent corrosion resistance and long-lasting performance. Thicker gauge stainless steel, like 0.05 inches or more, improves resistance to denting, warping, and physical damage. Proper manufacturing, such as welded seams and seamless construction, enhances structural integrity and reduces leaks. Coatings or treatments that resist moisture and corrosive elements can further extend the liner’s lifespan. Consistent quality and adherence to industry standards are vital, ensuring the liner withstands high temperatures and thermal cycling without compromising safety or performance over time.

Ease of Installation Process

Installing a 6-inch oval stainless steel chimney liner kit in tight flues can be straightforward, but it requires careful attention to the fitting process. Most kits include components like flashing, rain caps, and connectors that make assembly easier, but proper alignment and securing are essential to prevent leaks. The oval-to-round adapters or transition fittings often need precise measurement and adjustment to guarantee a tight seal, which can be tricky. Some kits lack detailed instructions, so prior experience or professional help can be a big advantage. Additionally, customizing parts, such as squeezing or bending the liner or adapters, may add complexity and extend installation time. Overall, choosing a kit with clear instructions and minimal modification needs makes the process smoother, especially for DIYers.

Insulation and Heat Resistance

Since heat resistance is essential for ensuring safety and efficiency, I always look for chimney liner kits made from high-grade stainless steel that can withstand temperatures up to 2100°F without warping or degrading. Insulation in 6-inch oval stainless liners helps maintain high temperatures, boosting draft and venting efficiency. Proper insulation reduces heat loss, which increases energy efficiency and lowers fuel costs. It also prevents heat transfer to surrounding combustible materials, enhancing safety. Materials like ceramic blankets are critical, as they protect the liner and nearby structures in high-temperature environments. A well-insulated liner not only performs better but also adds an extra layer of safety, giving me confidence that my venting system is reliable and durable over time.

Flexibility for Tight Spaces

When dealing with tight spaces, the flexibility of a 6-inch oval stainless steel chimney liner becomes essential for a smooth installation. These liners are designed to navigate narrow and irregular flue openings, making it easier to fit into constrained areas. The oval shape offers better adaptability compared to round liners, reducing the need for extensive modifications or custom fittings. High-quality stainless steel liners are often pliable enough to bend and shape around bends and corners without losing strength or integrity. This flexibility allows for seamless transitions through complex vent routes, minimizing gaps or leaks. Plus, their maneuverability saves time and effort during installation, especially in confined spaces. Choosing a liner that’s flexible enough ensures a secure, professional fit, even in the most challenging, tight flues.

Weatherproof and Corrosion Resistance

Choosing a weatherproof and corrosion-resistant 6-inch oval stainless steel chimney liner is vital for guaranteeing long-lasting performance, especially in harsh outdoor conditions. Liners rated for 2100°F provide superior resistance against corrosion and rust, even in extreme weather. Using heavy-duty stainless steel with thick gauges and welded construction further enhances durability and prevents moisture ingress. Properly designed oval-to-round adapters and fittings create a tight seal, reducing water leaks and environmental damage. Applying protective coatings or additional layers can boost resistance against rain, snow, salt, and other corrosive elements. Regular maintenance and inspections are essential to preserve the liner’s weatherproof qualities over time. Investing in these features ensures your chimney liner remains reliable, safe, and durable regardless of the climate.

Venting System Compatibility

Selecting a compatible venting system is essential to guarantee your 6-inch oval stainless chimney liner fits properly and functions efficiently. First, verify all components—connectors, caps, and adapters—are compatible with oval liners to avoid fitting issues. It’s also important to check that the liner’s dimensions and bend angles match your existing vent system, maintaining proper airflow and preventing leaks. If you’re using adapters for oval-to-round transitions, confirm they’re secure and airtight. Additionally, check the liner’s maximum supported length and bend angles to match your setup, avoiding restrictions or insufficient venting. Ultimately, review manufacturer guidelines to ensure compatibility with your specific appliances and venting configurations, promoting safe and efficient operation. Proper venting system compatibility is key to optimal performance and safety.

Price and Warranty Options

Are you getting the best value for your money when shopping for a 6-inch oval stainless chimney liner kit? It’s crucial to compare prices across both online and offline retailers to ensure you’re not overpaying. Don’t forget to check the warranty duration and coverage—some kits come with limited warranties, while others offer extended protection for parts and labor, reflecting better durability. A manufacturer’s satisfaction guarantee or straightforward return policy can add peace of mind, especially if issues arise later. Higher-priced kits often include longer or more comprehensive warranties, indicating better support and product quality. Before buying, review customer feedback related to warranty claims and support responsiveness to gauge how reliable the warranty service truly is. Balancing cost with warranty coverage helps you make an informed, valuable investment.

Frequently Asked Questions

How Do I Measure My Flue Accurately for an Oval Liner?

To measure my flue accurately for an oval liner, I use a flexible tape measure to take the widest and narrowest points inside the flue. I note these dimensions carefully, making certain I measure both horizontally and vertically. For precise results, I might also use a ruler or caliper for depth. Double-checking my measurements before purchasing helps ensure I get the perfect fit for my chimney.

Are Oval Liners Compatible With Round Chimney Caps?

Yes, oval liners can be compatible with round chimney caps, but it’s essential to verify the cap’s specifications. I recommend measuring your chimney opening carefully and consulting with the cap manufacturer to ensure proper fit. Sometimes, adapters are needed to connect an oval liner to a round cap securely. Always prioritize compatibility to prevent leaks and ensure safe, efficient venting.

What Is the Maximum Length for Oval Stainless Steel Chimney Liners?

A chimney liner’s length is like a river’s stretch; it depends on your needs. For oval stainless steel liners, I find the maximum length typically around 25 to 30 feet, but it varies by manufacturer. Always check the specific product’s guidelines, since longer runs may require additional support or thicker gauge steel to maintain durability. Planning carefully guarantees your chimney stays safe and efficient over its entire length.

How Does Installation Differ Between Oval and Round Liners?

Installation of oval liners differs from round ones mainly because of their shape. Oval liners need precise measurements and sometimes custom fittings to guarantee a snug fit in tight or irregular flues. I recommend checking for proper clearance and using the right adapters. Unlike round liners, oval ones may require extra sealing to prevent leaks. Always follow manufacturer instructions carefully to ensure a safe, efficient installation.

Can Oval Liners Be Used With Existing Chimney Support Systems?

Yes, oval liners can be used with existing chimney support systems, but you should check compatibility first. I recommend measuring your chimney carefully and consulting support system specifications to guarantee a proper fit. Sometimes, adjustments might be needed to secure the liner properly. Always follow manufacturer guidelines and consider professional installation to guarantee safety and peak performance. I’ve found that proper support prevents issues like sagging or damage over time.

Conclusion

Choosing the right 6-inch oval stainless chimney liner kit is like finding the perfect fit for a puzzle piece—once it clicks, everything flows smoothly. I remember struggling with a tight flue until I finally installed a kit that matched perfectly, and suddenly, my fireplace heated efficiently again. Just like that puzzle, selecting the right liner makes all the difference—ensuring your chimney runs safe and effective, no matter how tight the space.