Harvia WHP500 Chimney Extension

The Harvia WHP500 is designed specifically for Harvia wood-fired sauna stove chimney kits. While it features standard dimensions, we recommend verifying compatibility with your specific stove model to ensure the locking mechanism and diameter align perfectly.

Because this extension is designed to lock securely into existing Harvia pipe sections, it is generally self-supporting. However, always check your local building codes and the specific installation manual for your chimney kit, as taller chimney stacks may require additional bracing for stability.

Yes, the WHP500 is fully rated for both indoor and outdoor use. Its durable stainless steel construction and double-wall insulation are built to withstand varying weather conditions while maintaining safety standards.

You must maintain a minimum safety distance of 3.94 inches (100mm) from the outer surface of the chimney to any inflammable materials. Adhering to this clearance is critical for fire safety and compliance with the CE-marking standards.

The extension features integrated slots that allow the pipe sections to twist and lock together. This mechanical connection creates a rigid, continuous flue that resists the expansion and contraction caused by the high temperatures of a sauna stove.