{"product_id":"harvia-whm25-vapor-barrier","title":"Harvia Vapor Barrier (WHM25)","description":"\u003cp style=\"margin-bottom: 16px;\"\u003e\u003cstrong\u003eEnsure superior moisture control and energy efficiency for Harvia saunas with the WHM25 vapour barrier. It weighs 1.1 lbs. Supplied in black.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul style=\"margin-top: 8px; padding-left: 18px;\"\u003e\n\u003cli\u003ePrevents the infiltration of moisture\u003c\/li\u003e\n\u003cli\u003eReduces heat loss and enhances energy savings\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhat's Included\u003c\/h2\u003e\n\u003cdiv style=\"display: flex; flex-wrap: wrap; gap: 16px; margin-top: 8px;\"\u003e\n\u003cdiv style=\"flex: 1 1 220px; border: 1px solid #ddd; border-radius: 4px; padding: 12px;\"\u003e\n\u003cstrong\u003eIn the Box\u003c\/strong\u003e\u003cbr\u003eVapour Barrier\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch2\u003eProduct Specifications\u003c\/h2\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eHarvia Part Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eWHM25\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eColor \/ Finish\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e1.1 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eWarranty\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e2 years (consumer use, +1 year if registered with Harvia); 2 years (commercial use)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eShips\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eParcel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003e\u003cstrong\u003eMade In\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; border: 1px solid #ddd;\"\u003eFinland\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp style=\"margin-bottom: 16px;\"\u003e\u003cstrong\u003eThis item is not tied to a specific heater or stove model — it suits any Harvia sauna.\u003c\/strong\u003e\u003c\/p\u003e\n\u003ch2\u003eInstallation \u0026amp; Use Notes\u003c\/h2\u003e\n\u003cul style=\"margin-top: 8px; padding-left: 18px;\"\u003e\n\u003cli\u003eThe vapour barrier is the layer that stops sauna humidity migrating into the wall build-up and condensing inside it.\u003c\/li\u003e\n\u003cli\u003eFoil side faces into the hot room. Tape every seam and every penetration.\u003c\/li\u003e\n\u003cli\u003eInstall it before the cladding — this is not a retrofit item.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFAQs\u003c\/h2\u003e\n\u003ch3\u003eWhich way round does the vapour barrier go?\u003c\/h3\u003e\n\u003cp style=\"margin-bottom: 16px;\"\u003eFoil side facing into the hot room, always. Tape every seam and every penetration. It goes in before the cladding — this is not a retrofit item, and getting it wrong causes damage you will not see until it is structural.\u003c\/p\u003e\n\u003ch2\u003eDownloads\u003c\/h2\u003e\n\u003cdiv style=\"padding: 6px 0; display: flex; flex-direction: column; gap: 8px;\"\u003e\n\u003cdiv style=\"display: flex; align-items: center;\"\u003e\n\u003cimg style=\"width: 20px; height: 20px; margin-right: 8px;\" alt=\"Download Icon\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0903\/2666\/3539\/files\/Icons-10.png?v=1753874853\"\u003e \u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0903\/2666\/3539\/files\/Harvia-WHM25-Installation-Instructions.pdf?v=1786759735\" target=\"_blank\"\u003eInstallation Manual\u003c\/a\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"display: flex; align-items: center;\"\u003e\n\u003cimg style=\"width: 20px; height: 20px; margin-right: 8px;\" alt=\"Download Icon\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0903\/2666\/3539\/files\/Icons-10.png?v=1753874853\"\u003e \u003ca rel=\"noopener\" href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0903\/2666\/3539\/files\/Harvia-Warranty-11-2025.pdf?v=1786565109\" target=\"_blank\"\u003eWarranty Statement\u003c\/a\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Harvia","offers":[{"title":"Default Title","offer_id":63965587898739,"sku":"WHM25","price":300.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0903\/2666\/3539\/files\/Harvia-WHM25.webp?v=1786759854","url":"https:\/\/allseasonpatio.com\/products\/harvia-whm25-vapor-barrier","provider":"All Season Patio Company","version":"1.0","type":"link"}