Create a clean, moisture-resistant chimney penetration with the Harvia Vapour Barrier 225–250mm.
The Harvia WHM25 Vapour Barrier is designed to create a secure, airtight seal where a Harvia steel chimney passes through a building's vapour barrier. Engineered for chimney penetrations measuring 225–250 mm, this genuine Harvia accessory helps maintain the integrity of the building envelope while supporting proper moisture management around the chimney installation.
Manufactured for seamless compatibility with Harvia steel chimney systems, the vapour barrier provides a neat, professional finish while helping reduce unwanted air leakage and protecting the surrounding structure from moisture migration. It is an important component for achieving a safe, durable, and properly sealed chimney installation.
Ideal for new sauna construction, renovations, or chimney upgrades, the WHM25 Vapour Barrier complements Harvia's premium chimney system and is designed for dependable long-term performance.
User Manual available for installation guidance.
Features
• Genuine Harvia chimney accessory
• Designed for 225–250 mm chimney penetrations
• Creates an airtight vapour barrier seal
• Helps protect surrounding building structures
• Supports proper moisture management
• Professional finished appearance
• Designed specifically for Harvia steel chimney systems
• Durable construction for long service life
Benefits
• Helps maintain the integrity of the building's vapour barrier
• Reduces unwanted air leakage around chimney penetrations
• Protects surrounding structures from moisture migration
• Creates a clean, professional installation
• Designed for reliable compatibility with Harvia chimney systems
• Ideal for new installations and renovation projects
Product Specifications
Brand: Harvia
Model: WHM25
Product Type: Vapour Barrier
Compatible Chimney Opening: 225–250 mm
Compatibility: Harvia Steel Chimney Systems
Application: Chimney vapour barrier penetration sealing
Installation: Interior building vapour barrier applications
Perfect For
• Wood-burning sauna installations
• Harvia steel chimney systems
• New sauna construction
• Sauna renovations
• Residential sauna projects
• Professional chimney installations
Pair With
• Harvia Steel Chimneys
• Harvia Smoke Pipes
• Harvia Chimney Extension Pipes
• Harvia Rain Caps
• Harvia Smoke Dampers
• Harvia Chimney Accessory Kits
User Manual
