Product Benefits

A Harvia steel chimney is sold as a base kit sized for a typical room. Taller rooms, or a roof further away than the kit allows, need extending. These are the parts that do it: the WHP1000500 extension in stainless steel and the WHP1000500M in black, plus the WHP-AS tilted accessory kit and the WHP-ASSYM and WHP-ASSYMM symmetric kits for the roof penetration. Harvia rates the assembled chimney as self-supporting to 3 metres indoors and 2 metres outdoors.

The extensions add length to the run. The accessory kits handle where the chimney leaves the building. The tilted kit suits a pitched roof, the symmetric kits a flat or near-flat penetration, and the M suffix on the WHP-ASSYMM means the black finish rather than stainless. Pick the finish to match the chimney you already have, because the two do not sit well together on a visible run.

Harvia rates the chimney self-supporting to 3 metres indoors and 2 metres outdoors. Past that it needs bracing, and bracing is a structural decision rather than a parts decision. If your run is longer than those figures, tell us before ordering so we can check what the installation needs.

Harvia publishes no pipe diameter and no section length for the WHP1000500 and WHP1000500M on its own product pages. The name and the 1550 mm carton imply a 1.5 metre section, but Harvia states neither the bore nor the length anywhere, so we will not print a figure we cannot source. Confirm the bore of your existing chimney with us before ordering. The three accessory kits, WHP-AS, WHP-ASSYM and WHP-ASSYMM, have no Harvia model page at all, so everything we hold on them comes from the supplier inventory sheet. Chimney work is a job for a certified installer and is usually subject to local permit.

• Extension or accessory kit

• The self-supporting limit

• Benefits and Features

• Extends an existing Harvia steel chimney rather than replacing it

• Stainless steel or black powder coated, so the run stays one finish

• Self-supporting to 3 metres indoors and 2 metres outdoors

• Tilted and symmetric accessory kits for the roof penetration

• Compatible with 31 Harvia wood heater models

• Made in Finland

Specifications

• Harvia Steel Chimney Extensions: adding height to a Harvia steel chimney

• BEFORE YOU ORDER: WHAT HARVIA DOES NOT PUBLISH ON THESE PARTS

Ideal For

Rooms with a ceiling higher than the base chimney kit covers

Runs where the roof penetration needs a tilted or symmetric kit

Replacing a damaged section on an existing Harvia steel chimney

Matching a black chimney rather than mixing finishes

NOT IDEAL FOR

Masonry chimneys. These are for the Harvia steel system only

Runs longer than 3 metres indoors without additional bracing

Anyone who has not confirmed their existing chimney bore

Self-installation. Chimney work needs a certified installer

Swipe to see the full table

Harvia steel chimney extensions and accessory kits. WHP-AS, WHP-ASSYM and WHP-ASSYMM have no Harvia model page, so their data comes from the supplier inventory sheet. Pipe diameter and section length are not published by Harvia for the extensions.

Part

What it is

Finish

Packed length

WHP1000500

Chimney extension, no kit

Stainless steel

1550 mm

WHP1000500M

Chimney extension, no kit

Black

1550 mm

WHP-AS

Chimney tilted accessory kit

Stainless steel

Not published by Harvia

WHP-ASSYM

Chimney symmetric accessory kit

Stainless steel

Not published by Harvia

WHP-ASSYMM

Chimney symmetric accessory kit

Black

Not published by Harvia

Self-supporting, indoors

Maximum unbraced run

3 m

Self-supporting, outdoors

Maximum unbraced run

2 m

Also Consider

For the pipe between the stove and the chimney rather than the chimney itself, see the Harvia smoke pipe and fittings. For a complete chimney rather than an extension, the Harvia WHP1500 chimney kit is the starting point. For the stove, see our wood burning sauna stoves.

Why buy this from GooFitness

Chimney parts are the easiest thing in this catalogue to order wrong, because the finish and the bore both have to match what is already on the building. Send us a photo of the existing run and the stove model and we will tell you which parts fit. We stock the pipe, the dampers and the flanges alongside these. contact us at support@goofitness.com, 9am to 6pm EST, Monday to Friday, or book a call.

Questions buyers ask

What diameter are the extensions?

Harvia does not publish a bore or a section length for the WHP1000500 or the WHP1000500M on its product pages. Confirm your existing chimney bore with us before ordering rather than assuming from the part name.

How high can the chimney go without bracing?

Harvia rates the assembled chimney self-supporting to 3 metres indoors and 2 metres outdoors. A longer run needs bracing, which is a structural decision.

What is the difference between the tilted and symmetric kits?

The tilted kit, WHP-AS, suits a pitched roof penetration. The symmetric kits, WHP-ASSYM in stainless and WHP-ASSYMM in black, suit a flat or near-flat penetration.

Do these fit a masonry chimney?

No. These are parts for the Harvia steel chimney system. A masonry chimney takes the WZ011115 masonry connector instead.

Frequently Asked Questions

What's the difference between the WHP1000500 and WHP1000500M? The WHP1000500 is stainless steel and the WHP1000500M is the same extension in black finish.

How far can the chimney run without extra bracing? Harvia rates the assembled chimney as self-supporting to 3 metres indoors and 2 metres outdoors; beyond that it needs bracing.

Which accessory kit do I need for my roof? The WHP-AS tilted kit suits a pitched roof, while the WHP-ASSYM and WHP-ASSYMM symmetric kits suit a flat or near-flat roof penetration.

What's the pipe diameter or section length of the extension? Harvia doesn't publish a bore or length for the WHP1000500 on its product page, so confirm the bore of your existing chimney with us before ordering.

Can I install this myself? Chimney work is a job for a certified installer and is usually subject to local permit.

Questions? Contact us at support@goofitness.com or visit goofitness.com.