Choosing the best ceiling support box kit chimney can be challenging due to the variety of options available, each offering different features and compatibility. The top pick, the DuraVent Steel Triple Wall Flat Ceiling Support Box, stands out for its durability and easy installation. The Selkirk 6T Support Box offers a reliable choice for standard setups, while the AllFuel HST Through The Attic Kit provides excellent insulation for attic installations. Many options balance affordability with quality, but tradeoffs often include size constraints or installation complexity. Continue reading for a detailed comparison to help you find the perfect fit for your project.
Key Takeaways
- Durability and material quality are critical for long-term chimney support stability.
- Size compatibility with your chimney pipe determines the ease of installation and safety.
- Features like insulation and spark guards add value for specific installation environments.
- Price varies widely; the most expensive options generally offer better build quality and ease of installation.
- Clear compatibility with chimney pipe diameter is essential to prevent leaks and safety issues.
| Cathedral Ceiling Kit with Spark Guard Chimney Cap for 6″ Diameter 304 Stainless Steel Double Wall Chimney Pipe |  | Best Overall Cathedral Ceiling Support Kit | Diameter: 6 inches | Material: 304 Stainless Steel | Supports: Up to 45 feet of chimney pipe | VIEW LATEST PRICE | See Our Full Breakdown |
| 8-Inch Support Box for Chimney Installation |  | Best for Mobile Homes and Narrow Roofs | Part Number: 208424 | Item Weight: 16.06 pounds | Product Dimensions: 15.25 x 15.25 x 24.75 inches | VIEW LATEST PRICE | See Our Full Breakdown |
| Selkirk 6T Support Box |  | Best for Versatile 6-Inch Chimney Installations | Material: Stainless Steel | Dimensions: 30″D x 8″W x 6″H | Capacity: Supports 20 feet of chimney | VIEW LATEST PRICE | See Our Full Breakdown |
| DuraVent Steel Triple Wall Flat Ceiling Support Box |  | Best for Wood Stoves and Long Runs | Material: Galvanized steel | Maximum Pipe Length: 35 feet | Compatible Systems: DuraPlus 2100°F HT | VIEW LATEST PRICE | See Our Full Breakdown |
| AllFuel HST Through The Attic Kit with Spark Guard Chimney Cap for 6″ Diameter 304 Stainless Steel Double Wall Chimney Pipe |  | Best Overall for Single-Story Homes | Manufacturer: AllFuel HST | Size: 11″ Square Ceiling Support Box | Material: 304 Stainless Steel | VIEW LATEST PRICE | See Our Full Breakdown |
| DURAVENT 6″ DURAPLUS Basic Through The Ceiling Kit |  | Best Value for Complete 6-Inch Flue Venting | Material: Stainless Steel | Diameter: 6 inches | Weight: 28 pounds | VIEW LATEST PRICE | See Our Full Breakdown |
| Selkirk 6T-PCK Pitched Ceiling Support Kit |  | Best for Pitched or Cathedral Ceilings | Material: Stainless Steel | Product Dimensions: 17.3 x 17.3 x 19.3 inches | Item Weight: 23.6 pounds | VIEW LATEST PRICE | See Our Full Breakdown |
| Cathedral Ceiling Kit with Spark Guard Chimney Cap for 6″ Diameter 304 Stainless Steel Double Wall Chimney Pipe |  | Best for Cathedral or Vaulted Ceilings | Diameter: 6 inches | Material: 304 stainless steel | Support Length: Up to 45 feet | VIEW LATEST PRICE | See Our Full Breakdown |
| Selkirk 8-Inch Pitched Ceiling Kit |  | Best for Cathedral and Pitched Ceiling Installations | Diameter: 8 inches | Model: 8T-PCK | Application: Cathedral or pitched ceilings | VIEW LATEST PRICE | See Our Full Breakdown |
| 24-inch Tall Square Ceiling Support Box for 6-inch Diameter 304 Stainless Steel AllFuel Class-A Double Wall Insulated Chimney Pipe |  | Best for Heavy-Duty Support in High-Pitched or Vaulted Ceilings | Material: 304 stainless steel and galvanized steel | Dimensions: 24 inches tall | Support Type: Ceiling support box | VIEW LATEST PRICE | See Our Full Breakdown |
More Details on Our Top Picks
Cathedral Ceiling Kit with Spark Guard Chimney Cap for 6″ Diameter 304 Stainless Steel Double Wall Chimney Pipe
This kit stands out for its comprehensive design tailored specifically for cathedral and vaulted ceilings, offering a seamless fit with AllFuel HST Class-A pipes. Unlike the DuraVent 6″ Duraplus Basic Through The Ceiling Kit, it includes a spark guard chimney cap, which adds safety for woodstoves and fireplaces. Its all-in-one approach simplifies installation in high ceilings, but it’s limited to use with AllFuel pipes and doesn’t accommodate other brands without additional parts. The stainless steel construction ensures durability, yet the kit’s specific compatibility means it isn’t a universal solution for every chimney type or brand.
Pros:- All-in-one kit simplifies installation process
- Includes a spark guard chimney cap for added safety
- Compatible with AllFuel HST Class-A chimney pipes
- Supports installations up to 45 feet of chimney pipe
Cons:- Limited to use with specific AllFuel pipes—no cross-brand compatibility
- Additional components needed for extended or offset runs
- Pipes and adapters sold separately, increasing total cost
Best for: Homeowners with single-story vaulted or cathedral ceilings installing AllFuel HST Class-A chimney pipes.
Not ideal for: Buyers with different chimney brands or those needing a more adaptable kit for various pipe types.
- Diameter:6 inches
- Material:304 Stainless Steel
- Supports:Up to 45 feet of chimney pipe
- Ceiling Support Box Size:11 inches square
- Pitch Range:1/12 to 6/12
- UL Certification:UL103HT
Bottom line: This kit is ideal for those installing AllFuel HST class-A pipes in vaulted ceilings who prioritize safety and simplicity.
8-Inch Support Box for Chimney Installation
This support box is designed to handle the unique challenges of installing chimneys in tight spaces like A-frames and mobile homes. Compared to the Selkirk 6T Support Box, which is optimized for narrower applications, this 8-inch model offers greater flexibility for larger or more complex setups. Its included components—support box, joists, and shield—ensure a secure and high-quality installation, though its specific focus on model SSII chimney limits its versatility. The weight of over 16 pounds might require extra help during installation, but its robust construction justifies this tradeoff.
Pros:- Includes all essential components for complete installation
- Heavy-duty, high-quality construction for durable support
- Ideal for mobile homes and A-frame structures
- Supports chimney runs in tight or unusual spaces
Cons:- Limited to SSII chimney models—less versatile for other brands
- Heavy weight may complicate installation without assistance
- No included power tools or batteries
Best for: Buyers installing SSII chimneys in mobile homes or narrow roof sections needing sturdy support.
Not ideal for: Homeowners with different chimney brands or those seeking a universal, lightweight support solution.
- Part Number:208424
- Item Weight:16.06 pounds
- Product Dimensions:15.25 x 15.25 x 24.75 inches
- Included Components:Support box, joists, cylindrical shield, support bucket, ceiling trim, screws
- Color:No Color
- Item Package Quantity:1
Bottom line: Designed for specific applications like mobile homes, this support box provides robust support at the expense of versatility.
Selkirk 6T Support Box
The Selkirk 6T Support Box offers a solid choice for installing 6-inch diameter chimneys in framed structures, mobile homes, or spaces under narrow roofs. Its stainless steel construction ensures durability, and its insulation shielding enhances safety in attic spaces. Compared with the Cathedral Ceiling Kit, which caters specifically to vaulted ceilings and offers more comprehensive components, the 6T is more limited in scope but excels in supporting small to medium runs with insulation needs. Its small weight suggests a lightweight design, but precise installation inside joists is crucial to prevent gaps or leaks.
Pros:- Supports up to 20 feet of 6-inch chimney length
- Provides insulation shielding for attic safety
- Durable stainless steel construction
- Suitable for a range of structures including mobile homes
Cons:- Limited to 6-inch diameter chimneys—no flexibility for other sizes
- Requires precise placement within joists for proper sealing
- Lightweight design may suggest less robustness in extreme conditions
Best for: Homeowners needing a reliable, straightforward support solution for 6-inch chimneys in diverse structures.
Not ideal for: Those installing larger diameter pipes or seeking a universal support box for multiple brands and sizes.
- Material:Stainless Steel
- Dimensions:30″D x 8″W x 6″H
- Capacity:Supports 20 feet of chimney
- Finish Type:Stainless Steel
- Installation Type:Ceiling
- Item Weight:8 ounces
Bottom line: This support box offers dependable support for 6-inch chimneys in a variety of structures, with installation precision being key.
DuraVent Steel Triple Wall Flat Ceiling Support Box
The DuraVent Steel Triple Wall Flat Ceiling Support Box is tailored for supporting wood stove vents through the ceiling, supporting up to 35 feet of DuraPlus pipe. Its galvanized steel build offers durability, much like the Selkirk 6T Support Box, but with an emphasis on supporting longer pipe runs, making it ideal for larger heating systems. The built-in trim simplifies installation, yet its specific design for DuraPlus systems limits compatibility with other vent types. For buyers needing a sturdy, long-length support, this model delivers, though professional installation may be necessary for proper sealing.
Pros:- Supports up to 35 feet of vent pipe—ideal for large systems
- Durable galvanized steel construction
- Includes built-in trim for quick, clean installation
- Designed for high-temperature chimney systems
Cons:- Limited to DuraPlus vent systems—less versatile
- May require professional sealing for optimal safety
- Designed specifically for certain configurations, reducing flexibility
Best for: Homeowners with wood-burning stoves or appliances requiring extensive vent runs up to 35 feet.
Not ideal for: Those with non-DuraPlus vent systems or seeking a more universal ceiling support kit.
- Material:Galvanized steel
- Maximum Pipe Length:35 feet
- Compatible Systems:DuraPlus 2100°F HT
- Application:Wood stoves, furnaces, boilers
- Includes:Built-in trim
Bottom line: This support box excels for large, long-length vent systems in wood stove installations, with installation expertise recommended.
AllFuel HST Through The Attic Kit with Spark Guard Chimney Cap for 6″ Diameter 304 Stainless Steel Double Wall Chimney Pipe
This all-in-one kit stands out for its comprehensive setup tailored specifically for single-story homes, supporting up to 45 feet of AllFuel HST Class-A double wall chimney pipe. Unlike the DuraVent 6″ DURAPLUS Basic Through The Ceiling Kit, which requires additional pipe purchase, this kit includes essential components like a chimney cap, storm collars, and roof flashing, streamlining installation. The stainless steel construction ensures durability against the elements, and its support length makes it versatile for various home sizes. The main tradeoff is that it’s designed exclusively for AllFuel HST products and only supports single-story configurations, limiting flexibility. Overall, this kit offers a seamless, all-in-one solution for straightforward installations in single-story homes, saving time and reducing setup complexity.
Pros:- All-in-one kit simplifies installation and reduces parts sourcing
- Supports up to 45 feet of chimney, suitable for many home setups
- Includes essential components like chimney cap, storm collar, and flashing
Cons:- Requires separate purchase of chimney pipe lengths
- Limited to AllFuel HST products and single-story homes
Best for: Homeowners with single-story houses seeking a complete, easy-to-install chimney support solution using AllFuel HST pipe.
Not ideal for: Multi-story home owners or those using non-AllFuel HST chimney pipes, as compatibility is limited and installation scope is narrower.
- Manufacturer:AllFuel HST
- Size:11″ Square Ceiling Support Box
- Material:304 Stainless Steel
- Supports:Up to 45 feet of chimney pipe
- Compatible Pipe:AllFuel HST Class-A double wall chimney pipe
- Roof Flashing:1/12 – 6/12 Pitch Roof
Bottom line: This kit is ideal for homeowners with single-story homes who want a straightforward, comprehensive chimney installation package compatible with AllFuel HST pipes.
DURAVENT 6″ DURAPLUS Basic Through The Ceiling Kit
Compared with the AllFuel kit, the DURAVENT 6″ DURAPLUS Basic Through The Ceiling Kit offers a more budget-friendly option with a triple-wall, insulated design that enhances safety and efficiency. It comes as a complete package with adapters, storm collar, chimney cap, and insulation shield, making it a solid choice for those who want everything in one box. However, the chimney pipe itself must be purchased separately, which could add to overall costs if not already owned. Its design supports up to 35 feet of pipe, slightly less than the AllFuel option, and is limited to 6-inch flues, which means it’s less adaptable for larger setups. This kit makes sense for budget-conscious buyers seeking a safe, insulated solution, especially if they already have or plan to buy compatible pipe.
Pros:- Complete all-in-one kit for easier installation
- Triple-wall insulation improves safety and heat retention
- Includes essential components like chimney cap and storm collar
Cons:- Chimney pipe sold separately, increasing total cost
- Limited to 6-inch flues and 35 ft. support length
Best for: Budget-conscious homeowners installing or replacing 6-inch chimney systems for wood stoves or fireplaces, prioritizing safety and simplicity.
Not ideal for: Those requiring longer chimney runs over 35 feet or needing compatibility with larger or different brand pipes, as the kit is specifically designed for 6-inch systems and does not include pipe.
- Material:Stainless Steel
- Diameter:6 inches
- Weight:28 pounds
- Supports:Up to 35 ft.
- Dimensions:6 x 6 x 18 inches
- Supports:Long pipe runs up to 35 ft
Bottom line: This kit offers a cost-effective, insulated solution for 6-inch chimney setups, ideal for homeowners prioritizing safety and simplicity on a budget.
Selkirk 6T-PCK Pitched Ceiling Support Kit
This support kit is tailored for installations in pitched or cathedral ceilings, making it the best choice for homes with vaulted spaces. Its stainless steel construction supports high-efficiency appliances burning wood, oil, or gas, with a maximum continuous flue temperature of 1,000°F. Compared to the AllFuel or DuraVent kits, it doesn’t include all components but excels in high-temperature tolerance and durability. Installing this kit can be complex for DIY users because it requires additional insulated pipe lengths and flashing, which aren’t included. It’s best suited for those comfortable with custom setups or professionals. If your home has a flat ceiling, this product may not be the right fit, but it offers peace of mind for high-heat applications in pitched ceilings.
Pros:- High-temperature stainless steel supports up to 1,000°F
- Suitable for high-efficiency wood, oil, or gas appliances
- Includes all necessary components for secure installation
Cons:- Requires extra insulated pipe lengths and flashing, complicating installation
- Installation may be challenging for DIY users
Best for: Homeowners with vaulted or cathedral ceilings seeking a durable, high-temperature rated support solution for high-efficiency appliances.
Not ideal for: DIYers with flat ceilings or those seeking an all-in-one package, as additional components and installation complexity are involved.
- Material:Stainless Steel
- Product Dimensions:17.3 x 17.3 x 19.3 inches
- Item Weight:23.6 pounds
- Max Flue Temp:1,000°F
- Supports:High-temp, high-efficiency appliances
- Application:Pitched or cathedral ceilings
Bottom line: This kit is best for those with vaulted ceilings who need a robust, high-temp rated support system for their high-efficiency heating appliances.
Cathedral Ceiling Kit with Spark Guard Chimney Cap for 6″ Diameter 304 Stainless Steel Double Wall Chimney Pipe
This kit simplifies installation in homes with vaulted ceilings, supporting up to 45 feet of AllFuel HST double wall chimney pipe. It offers an all-in-one package with a ceiling support box, roof flashing, chimney cap, and adapters, similar to the AllFuel HST kit but tailored for cathedral spaces. Compared to the DuraVent 6″ DURAPLUS, which is more budget-oriented, this kit’s compatibility is limited to AllFuel HST pipes, and additional pipe sections and accessories must be purchased separately. Its support for longer chimney heights makes it ideal for larger or custom homes with vaulted ceilings. The main limitation is that it’s not compatible with other brands, so buyers committed to AllFuel HST will find this package particularly convenient.
Pros:- All-in-one kit simplifies cathedral ceiling installations
- Supports up to 45 feet of chimney height
- Includes essential components like roof flashing and chimney cap
Cons:- Limited to AllFuel HST pipes, reducing flexibility
- Additional pipe and accessories are sold separately
Best for: Homeowners installing or upgrading chimneys in vaulted or cathedral ceiling homes using AllFuel HST pipes, seeking an all-in-one solution.
Not ideal for: Those with flat ceilings or using different chimney brands, since this kit only supports AllFuel HST pipes and requires additional components for full installation.
- Diameter:6 inches
- Material:304 stainless steel
- Support Length:Up to 45 feet
- Includes:Ceiling support, roof flashing, chimney cap
- UL Certification:UL103HT
Bottom line: This kit is perfect for vaulted ceiling homes using AllFuel HST pipes, offering a streamlined installation for longer chimney runs.
Selkirk 8-Inch Pitched Ceiling Kit
This kit stands out for its comprehensive design tailored specifically for cathedral or pitched ceilings, such as A-frame structures. Compared to the Support Box for Chimney Installation, which is more generic, the Selkirk 8-Inch Pitched Ceiling Kit offers targeted components that simplify installation in angled ceilings. However, it does require an additional purchase for insulated pipe lengths and flashing, adding to the overall cost. Its all-in-one approach makes it ideal for homeowners planning a complete setup within pitched spaces, but those needing insulated components upfront might find it less convenient. The included parts are straightforward to assemble, saving time during installation.
Pros:- Complete kit with all necessary components for pitched ceiling installation
- Designed specifically for cathedral or pitched structures
- Easy to assemble with included parts
Cons:- Does not include insulated pipe lengths, requiring additional purchase
- Limited to pitched ceiling applications, not suitable for flat ceilings
Best for: Homeowners installing chimneys in cathedral or steeply pitched ceilings who want a tailored, ready-to-install kit.
Not ideal for: Buyers with flat or standard ceilings, since this kit isn’t designed for non-pitched applications and lacks insulated pipe segments.
- Diameter:8 inches
- Model:8T-PCK
- Application:Cathedral or pitched ceilings
Bottom line: This kit is perfect for those seeking a dedicated solution for cathedral or pitched ceilings with straightforward installation, provided they can source insulated pipes separately.
24-inch Tall Square Ceiling Support Box for 6-inch Diameter 304 Stainless Steel AllFuel Class-A Double Wall Insulated Chimney Pipe
This support box excels for installations using AllFuel HST Class-A chimney pipes, especially in vaulted or high-pitched ceilings up to 8/12, offering a sturdy, heavy-duty solution. Unlike more generic options like the DuraVent Steel Triple Wall Flat Ceiling Support Box, it’s specifically engineered for AllFuel pipes, ensuring a secure fit and UL certification, which is critical for safety and compliance. Its stainless steel components and galvanized steel construction provide durability, but this narrow compatibility means it isn’t a versatile choice for other brands or pipe types. The included trim and twist-lock connection streamline setup, making it suitable for DIY projects requiring robust support in complex ceiling geometries.
Pros:- Heavy-duty construction with stainless steel components
- Compatible exclusively with AllFuel HST Class-A pipes for a secure fit
- Suitable for vaulted ceilings up to 8/12 pitch
Cons:- Limited to AllFuel HST pipes, not compatible with other brands
- Requires separate purchase of stove pipe adaptor
Best for: Homeowners or professionals installing AllFuel HST Class-A chimney pipes in vaulted or cathedral ceilings up to 8/12 pitch who prioritize durability and safety.
Not ideal for: Buyers using different chimney brands or seeking a universal solution, since this support box is exclusive to AllFuel HST pipes and requires a separate stove pipe adaptor.
- Material:304 stainless steel and galvanized steel
- Dimensions:24 inches tall
- Support Type:Ceiling support box
- Compatibility:AllFuel HST Class-A pipes
- UL Certification:UL103HT
Bottom line: This support box is ideal for those installing AllFuel HST chimney pipes in high, vaulted ceilings who need a robust, UL-certified support system, accepting some additional parts for installation.
How We Picked
I evaluated each product based on build quality, compatibility, ease of installation, safety features, and value for money. Products had to support common chimney pipe sizes and meet safety standards for supporting chimney weight and heat. I prioritized options that offer straightforward installation and durable materials, as these factors influence long-term performance and safety. Our ranking reflects a balance of these criteria, emphasizing reliability and user-friendliness for a range of budgets and skill levels.Factors to Consider When Choosing Best Ceiling Support Box Kit Chimney
Selecting the best ceiling support box kit chimney involves understanding several key factors that influence safety, compatibility, and ease of installation. It’s vital to match the support box size with your chimney pipe, consider the installation environment (attic or ceiling space), and evaluate safety features like spark guards. Balancing cost with durability ensures you get a product that lasts without overspending. Recognizing common pitfalls, such as choosing a support box that’s too small or incompatible, helps avoid costly mistakes.Size Compatibility
The support box must precisely match the diameter of your chimney pipe, typically 6 or 8 inches. An undersized box can compromise safety and stability, while an oversized one may be difficult to install or create gaps that allow leaks. Always verify your pipe diameter and check the support box specifications before purchasing. Proper sizing ensures a secure fit, reduces installation time, and maintains system integrity.
Material and Durability
Most support boxes are made from galvanized steel or stainless steel, with stainless offering superior corrosion resistance, especially in moist environments. Investing in high-quality materials pays off through increased longevity and reduced maintenance. Cheaper options might be prone to rust or warping over time, which could jeopardize safety. Consider your installation environment and choose a material that withstands heat and moisture for lasting performance.
Ease of Installation
User-friendly designs with clear mounting instructions and adjustable components can significantly reduce installation time. Features like pre-drilled holes, quick-connect fittings, and standardized sizes help streamline the process. Beware of overly complex designs that require specialized tools or additional modifications, which can lead to mistakes or delays. A well-designed support box minimizes errors and ensures a secure, safe setup.
Safety Features
Look for support boxes with integrated safety features such as spark guards, insulation, and fire-resistant materials. Spark guards prevent embers from escaping into the ceiling cavity, reducing fire risk. Insulation helps maintain energy efficiency and prevents heat transfer to surrounding materials. Fire-resistant components provide additional safety margins, especially in attic or enclosed spaces. Prioritizing these features enhances overall safety and peace of mind.
Cost and Value
While higher-priced options often deliver better materials and features, they are not always necessary for every project. Balance your budget with the specific needs of your installation, such as size, safety, and durability. Cheaper models might suffice for temporary or low-use setups but could require replacement sooner. Investing in a slightly more expensive, well-reviewed product can save money and effort long-term, especially for critical safety components.
Frequently Asked Questions
How do I know if a ceiling support box kit is compatible with my chimney pipe?
Compatibility hinges on matching the diameter of your chimney pipe with the support box’s specifications. Most support boxes specify the pipe size they support, commonly 6 or 8 inches. It’s essential to measure your pipe accurately and verify that the support box’s internal diameter aligns perfectly. Additionally, check if the support box is designed for your type of installation environment, such as attic or ceiling mount, to ensure a secure fit and safe operation.
Can I install a ceiling support box myself or should I hire a professional?
Installing a ceiling support box can be straightforward for those with basic DIY skills, especially with models that include clear instructions and adjustable features. However, because chimney safety and safety standards are involved, many homeowners prefer professional installation to ensure compliance and peace of mind. Professionals can also identify potential issues like structural weaknesses or ventilation concerns that might be overlooked otherwise.
What safety features should I look for in a support box kit?
Key safety features include spark guards to prevent embers from escaping, heat-resistant and fireproof materials, and insulation options to prevent heat transfer. These features help minimize fire risks and improve the longevity of your chimney system. Support boxes with reinforced mounting points and secure fasteners also contribute to overall stability, especially in high-vibration or windy environments. Prioritizing safety features is vital for long-term peace of mind in your installation.
Is it worth paying more for a stainless steel support box?
Stainless steel offers superior corrosion resistance and durability compared to galvanized steel, especially in humid or attic environments. Paying more upfront for stainless steel support boxes can extend the lifespan of your chimney support system, reducing maintenance and replacement costs over time. For critical or long-term installations, the investment in stainless steel is often justified by its enhanced safety and reliability, making it a worthwhile choice for many homeowners.
How important is insulation in a ceiling support box kit?
Insulation in a support box helps prevent heat transfer to surrounding materials, reducing fire hazards and improving energy efficiency. In attic or enclosed ceiling environments, insulation minimizes heat loss and condensation, protecting your home and extending the life of the chimney system. While not all support boxes include insulation, adding it can be a smart safety upgrade, especially in warmer or more humid climates. Prioritize models that incorporate or allow easy addition of insulation for comprehensive safety.
