Telford Tempest Slimline 300 Litre Indirect Unvented Hot Water Cylinder 510 Diameter TSMI300SL
Telford Tempest Slimline 300 Litre Indirect Unvented Hot Water Cylinder (TSMI300SL) is a high-capacity mains-pressure hot water cylinder designed for larger homes, high-demand households and suitable commercial applications. Manufactured from durable Duplex 2304 stainless steel and featuring a space-saving 510mm diameter design, this premium unvented cylinder provides reliable hot water performance, excellent corrosion resistance and efficient heat retention.
300 Litres
510mm
Indirect Unvented
TSMI300SL
The generous 300-litre capacity provides a substantial supply of mains-pressure hot water for larger homes and households with high simultaneous demand.
With a 510mm diameter, the cylinder offers a space-conscious installation solution while still providing high-capacity hot water storage.
Manufactured from Duplex 2304 stainless steel for excellent durability and corrosion resistance, supporting dependable long-term performance.
Designed for indirect heating systems with approximately 40-minute heat recovery and high-density polyurethane insulation to help reduce heat loss.
Specifications
| Brand | Telford |
| Range | Tempest Slimline |
| Model | TSMI300SL |
| Cylinder type | Indirect Unvented Hot Water Cylinder |
| Capacity | 300 Litres |
| Diameter | 510mm |
| Material | Duplex 2304 Stainless Steel |
| Heating system | Indirect heating system |
| Compatible heat sources | Compatible gas and oil boilers |
| Operating pressure | 3 bar |
| Maximum incoming supply pressure | 12 bar |
| Approximate heat recovery time | 40 minutes |
| Insulation | High-density polyurethane |
| Components | WRAS-approved components |
| Cylinder shell warranty | Lifetime |
Installation & maintenance
The Telford Tempest Slimline 300 Litre Indirect Unvented Hot Water Cylinder is designed for connection to an indirect heating system and should be installed by a suitably qualified professional in accordance with current installation requirements and manufacturer instructions. The unvented system operates at mains pressure, providing strong hot water delivery to multiple outlets. Regular inspection and servicing of the cylinder, safety controls and associated components is recommended to maintain safe and efficient operation.
Warranty & next steps
The cylinder features a lifetime warranty on the cylinder shell, providing long-term peace of mind. Before purchasing, confirm the available installation space, incoming mains pressure, heating system compatibility and required cylinder capacity to ensure the Telford Tempest Slimline 300 Litre is suitable for your property.
