If you’re installing a wood stove or upgrading a wall pass-through, a through-the-wall chimney kit is essential for a safe, code-compliant setup. These kits simplify venting through exterior walls and help you manage clearances, brackets, and chimney lengths. This guide highlights five well-suited options for 6″ or 8″ All Fuel and DuraPlus-style systems, focusing on who benefits most and what to watch for during installation. Ideal buyers include homeowners with external walls, DIY installers seeking a straightforward install, and those upgrading to Class-A double-wall piping for extended runs.
| Product | Best For | Key Benefit |
|---|---|---|
| Duravent 6″ DuraPlus Through the Wall Kit | Homes using DuraPlus 6″ pipe | Secure twist-lock design, supports long vertical runs |
| AllFuel HST Through The Wall Kit (6″ & 8″ options) | AllFuel HST Class-A users | Adjustable wall brackets, multiple lengths for through-wall pass |
| AllFuel HST Through The Wall Kit With Spark Guard (8″ Cap) | Heat-sensitive or spark-prone areas | Spark guard chimney cap included |
| AllFuel HST Through The Wall Kit With Spark Guard (18″ Length) | Longer interior-to-exterior runs | Extended length options with adjustable bracket |
| AllFuel HST Through The Wall Kit With Flat Top Cap (6″ Cap) | Compact installations | Flat top cap for broad exterior aesthetics |
Duravent 6″ DuraPlus Through the Wall Kit
- Brand: DuraVent
- Model: Through the Wall Kit for 6″ DuraPlus chimney pipe
- Features: Through-the-wall vertical installation, secure twist-lock design, supports up to 40 feet (pipe not included)
Best for: Homeowners with a straight 6″ DuraPlus run who want a reliable twist-lock connection and high vertical capacity. This kit is chosen for durability and straightforward assembly, making it a solid option where long vent runs are anticipated. Limitation: pipe length beyond what’s included must be purchased separately.
AllFuel HST Through The Wall Kit (6″ Cap)
- Brand: AllFuel HST
- Diameter: 6″ Class-A double-wall pipe compatibility
- Features: Through-wall kit with flat top cap; adjustable wall bracket; wall thickness considerations for proper pass
Best for: Installers using AllFuel HST 6″ class-A piping who need flexibility with wall thickness and a flat-top exterior look. Use this when you plan a standard through-wall pass and want a bracket option that adapts to varying exterior features. Caution: attachment is brand-specific to AllFuel HST class-A systems.
AllFuel HST Through The Wall Kit With Spark Guard (8″ Cap)
- Brand: AllFuel HST
- Diameter: 8″ Class-A double-wall pipe
- Features: Spark guard cap, adjustable wall bracket, lengths sold separately
Best for: Those venting through thicker walls or requiring enhanced spark protection in high-traffic areas. The spark guard cap adds extra safety, and the kit suits longer vertical runs. Limitation: availability tied to AllFuel HST brand components only.
AllFuel HST Through The Wall Kit With Spark Guard (18″ Length)
- Brand: AllFuel HST
- Diameter: 8″ Class-A double-wall pipe
- Features: 18″ length, adjustable wall bracket, spark guard cap option
Best for: Projects needing longer through-wall passes without additional elbows or extensions. This option helps reduce external protrusions while maintaining safety. Caution: longer lengths may require extra wall support and precise measurement of wall thickness.
AllFuel HST Through The Wall Kit With Flat Top Cap (6″ Cap)
- Brand: AllFuel HST
- Diameter: 6″ Class-A double-wall pipe
- Features: Flat top cap, standard wall bracket, 6″ length
Best for: Compact installations or where exterior aesthetics require a flat cap. Choose this for tight spaces and shorter runs while preserving proper clearance. Limitation: shorter length may require adjacent pieces to complete the run.
Buying Guide
Key considerations when choosing a through-the-wall kit:
- Pipe compatibility: Match the kit to your chimney’s diameter and brand for a reliable seal and safe operation.
- Wall thickness and pass-through: Measure wall thickness carefully and choose brackets that provide sufficient clearance both inside and outside.
- Bracket type and vertical rise: Adjustable brackets help accommodate gutters, overhangs, and multiple story installs; plan one per 8 feet of vertical rise.
- Cap style: Flat top caps offer a cleaner exterior look; spark guards provide extra safety in areas with debris or sprinkler concerns.
- Length options: Longer lengths reduce the number of joins but may require more precise alignment and support.
- Safety and codes: Ensure compatibility with local code requirements and the chimney system you’re using (brand-specific kits are common).
FAQ
- Q: Do these kits work with all chimney brands? A: Most are brand-specific, designed for the corresponding Class-A double-wall pipe systems.
- Q: Can I pass a through-the-wall kit through an external chase? A: Yes, but measure external clearance and ensure brackets accommodate any overhangs.
- Q: Is a wall bracket required for every eight feet of vertical rise? A: Yes, one bracket is typically required for each 8 feet of vertical rise above the base wall support.
- Q: Are spark guards essential? A: They offer added protection in areas with debris or where sparks may pose a risk, depending on local codes.
- Q: What length should I choose for a through-wall kit? A: Choose lengths to match the wall thickness, plus extra clearance if the pipe will be exposed outside.
- Q: Do these kits include all pipes needed for a full install? A: Pipes are sold separately in many cases; verify included components before purchase.