{"product_id":"vaillant-unistor-300-unvented-hot-water-cylinder","title":"Vaillant uniSTOR 300 Unvented Hot Water Cylinder","description":"\u003ch3\u003eVaillant uniSTOR 300 Unvented Hot Water Cylinder\u003c\/h3\u003e\n\nThe Vaillant uniSTOR 300 Unvented Hot Water Cylinder is a high-capacity hot water storage solution designed for sealed heating systems. It is an excellent choice for homeowners upgrading from a traditional open vented system with a cold water tank in the loft to a modern sealed system with a boiler and unvented cylinder. This upgrade removes the need for a loft tank, helping free up space while also significantly improving hot water pressure throughout the property.\n\nWith a large 300 litre capacity, this cylinder is ideal for larger homes, properties with multiple bathrooms, or households with high hot water demand. Manufactured from high-grade duplex stainless steel, the cylinder is designed for long-term durability, corrosion resistance, and reliable performance.\n\nThe uniSTOR cylinder is highly insulated using environmentally friendly materials to reduce heat loss and improve heating system efficiency. This helps reduce energy usage and can lower fuel bills over time. The cylinder also features a modern outer casing that is easy to clean and designed to fit neatly into airing cupboards or plant rooms.\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\n300 Litre Capacity\n\nSuitable for Sealed Heating Systems\n\nIdeal for Converting from Open Vented Systems\n\nHigh Grade Duplex Stainless Steel Cylinder\n\nHighly Insulated to Reduce Heat Loss\n\nEnvironmentally Friendly Insulation Materials\n\nModern, Easy-to-Clean Outer Casing\n\n2 Year Parts and Labour Guarantee\n\n25 Year Cylinder Warranty\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\nProduct: Vaillant uniSTOR 300 Unvented Hot Water Cylinder\n\nGTIN: 4024074789001\n\nProduct Type: Indirect Unvented Cylinder\n\nModel: Standard\n\nGross Weight (Including Packaging): 69.1kg\n\nNet Weight: 62.4kg\n\nHeight: 1745mm\n\nWidth: 595mm\n\nCapacity: 300 Litres\n\nWarranty: 25 Years (Subject to Manufacturer’s Terms \u0026amp; Conditions)\n\n\u003ch3\u003eWhy Choose an Unvented Cylinder?\u003c\/h3\u003e\n\nUnvented hot water cylinders supply hot water at mains pressure, providing stronger showers and better flow rates from taps compared to traditional vented systems. They also remove the need for a cold water tank in the loft, freeing up space and simplifying the heating system. Modern cylinders like the Vaillant uniSTOR range are highly insulated to reduce heat loss and improve overall energy efficiency.\n\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003ch4\u003eWhat size property is a 300L hot water cylinder suitable for?\u003c\/h4\u003e\n\nA 300 litre cylinder is typically suitable for large homes, properties with multiple bathrooms, or households with high hot water usage.\n\n\u003ch4\u003eWhat is the benefit of an unvented cylinder?\u003c\/h4\u003e\n\nAn unvented cylinder provides hot water at mains pressure, giving stronger showers, better tap flow, and removing the need for a loft water tank.\n\n\u003ch4\u003eHow long is the warranty on a Vaillant uniSTOR cylinder?\u003c\/h4\u003e\n\nVaillant uniSTOR cylinders come with a 25 year cylinder warranty and a 2 year parts and labour guarantee, subject to manufacturer’s terms and conditions.","brand":"Vaillant","offers":[{"title":"Default Title","offer_id":52979138199894,"sku":"147859","price":1254.38,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/vaillant-unistor-300-unvented-hot-water-cylinder-8260713.jpg?v=1775036071","url":"https:\/\/jjbuildingmaterials.co.uk\/products\/vaillant-unistor-300-unvented-hot-water-cylinder","provider":"JJ Building Materials","version":"1.0","type":"link"}