The Telford Tempest Slimline 250 Litre Indirect Unvented Hot Water Cylinder (TSMI250SL) is a premium space-saving hot water storage solution designed for homes with restricted installation space. Featuring a slim 510mm diameter and 250-litre capacity, this unvented cylinder provides reliable mains-pressure hot water for medium to large households. Constructed from durable Duplex 2304 stainless steel, it offers excellent corrosion resistance and long-term reliability. Designed for use with indirect heating systems such as gas and oil boilers, the cylinder provides a rapid 35-minute reheat time and high-density polyurethane insulation to minimise heat loss. With WRAS-approved components, integrated safety controls and a lifetime cylinder shell warranty, the Telford Tempest Slimline offers dependable performance in a compact footprint.