{"product_id":"viessmann-18-plate-heat-exchanger-refurbished-7841779","title":"Viessmann 18 Plate Heat Exchanger – Refurbished | Part No. 7841779","description":"\u003cp\u003eWhen a Viessmann Vitodens boiler begins delivering inconsistent hot water — lukewarm taps, pressure drops, or fluctuating temperatures — the plate heat exchanger is often the root cause. This compact but critical component manages heat transfer between your central heating circuit and domestic hot water supply, and a worn or scaled unit directly undermines both. The \u003cstrong\u003eViessmann 18 Plate Heat Exchanger (Part No. 7841779)\u003c\/strong\u003e is the refurbished direct replacement, restoring full hot water output and improving overall boiler efficiency.\u003c\/p\u003e\n\n\u003cp\u003eCompatible with selected Viessmann Vitodens models including the 050 W, 100 W, 111 W, and 200 W, this 18-plate unit is professionally refurbished — cleaned, descaled, pressure-tested, and inspected to confirm reliable, consistent operation before dispatch.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCompatible Boiler Models\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable style=\"width:100%;\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003cth\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eViessmann Vitodens 050 W\u003c\/td\u003e\n\u003ctd\u003eSelected variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViessmann Vitodens 100 W\u003c\/td\u003e\n\u003ctd\u003eSelected variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViessmann Vitodens 111 W\u003c\/td\u003e\n\u003ctd\u003eSelected variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eViessmann Vitodens 200 W\u003c\/td\u003e\n\u003ctd\u003eSelected variants\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eOEM Quality. Proven Performance. Backed by Warranty.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eEvery refurbished plate heat exchanger we supply is cleaned, pressure-tested, and performance-verified before dispatch. This 7841779 unit restores efficient heat transfer between circuits, resolving common Vitodens issues including reduced hot water flow and unstable temperature output. Supplied with a full \u003cstrong\u003e12-month warranty\u003c\/strong\u003e, it delivers dependable, cost-effective performance for homeowners and heating engineers alike.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eDelivery \u0026amp; Returns\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eOrders placed before \u003cstrong\u003e1:00 PM\u003c\/strong\u003e are dispatched the same working day, with standard and next-day delivery options available at checkout. Returns are accepted within \u003cstrong\u003e30 days\u003c\/strong\u003e, provided the item is unused and in its original packaging.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Please confirm that part number \u003cstrong\u003e7841779\u003c\/strong\u003e matches your existing unit using your boiler model and serial number before ordering. Installation must be carried out by a \u003cstrong\u003eGas Safe registered engineer\u003c\/strong\u003e to ensure safety compliance and warranty validity.\u003c\/p\u003e","brand":"Viessmann","offers":[{"title":"Refurbished","offer_id":47948089360549,"sku":"Viess-Phe-7841779","price":34.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0768\/1690\/8453\/files\/Viessmann-heat-exchanger-7841779-18-plate-1.png?v=1782502188","url":"https:\/\/ephsuppliers.com\/products\/viessmann-18-plate-heat-exchanger-refurbished-7841779","provider":"Elite Plumbing \u0026 Heating Suppliers Ltd","version":"1.0","type":"link"}