Harvia Chimney Extension Package
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Harvia Chimney Extension Package
Extend your Harvia wood stove chimney with the WHP1000 + WHP500M Chimney Extension Package. This stainless-steel, double-wall insulated kit adds 1.5 meters of vertical chimney and locks securely in place—perfect for achieving proper draft and code compliance in detached saunas or high-ceiling installations.
Key Features
- Modular stainless steel chimney extensions (1000 mm + 500 mm)
- Double-wall construction with mineral wool insulation
- Joint grooves lock sections securely against thermal movement
- CE-marked, freeze-thaw and soot-fire tested
- Vertical-only installation; stackable and self-supporting up to 2 m outdoors
- Designed, engineered, and made in Finland
- 2-Year Consumer Warranty
Required Components
The following items are required for proper installation and safe operation (sold separately):
- Base chimney kit—e.g., Harvia WHP1500 or WHP1500M
- Roof flashing and rain/water protection matched to your slope or roofing material
- Support brackets or guy wires if the extended chimney is exposed or exceeds self-support limits
What’s Included
- 1 × 1000 mm stainless steel chimney extension
- 1 × 500 mm stainless steel chimney extension
- 2 × locking bands for secure connection
- Installation and Operation Instructions
Specifications
| Specification | Details |
|---|---|
| Models | WHP1000 + WHP500M (Extension Sections) |
| Total Extension Length | 1500 mm (59 in) |
| Material / Finish | Stainless Steel, double-wall with mineral wool insulation |
| Self-Supporting Height (Outdoors) | Up to 2 m above last support |
| Max Unsupported Height (Indoors) | Up to 3 m total (supports required above) |
| Wind Load (Max Support Gap) | Supports spaced no more than 3 m (9.8 ft) apart; up to 6.5 ft (2 m) above last support |
| Diameter | 220 mm (8.66 in) |
| Certification / Origin | CE-marked, Finland |
Pro Tip: Follow the "3-2-10" chimney rule for safe operation—chimney should be 3 feet above roof penetration and 2 feet higher than anything within a 10 foot radius. If more height is needed, stack additional Harvia extension modules.
