Designed for connection to indirect heating systems such as boilers, the Tempest 300L provides substantial hot water storage while maintaining a compact cylindrical footprint. With a 3 bar operating pressure, 12 bar maximum supply pressure, 22mm compression connections and a lifetime cylinder shell warranty with 2 years on components, it is designed for demanding domestic and suitable light commercial installations.
300L Capacity
Indirect Unvented
Duplex 2304 Stainless Steel
ERP C
Lifetime Shell Warranty
300 Litre Capacity
High-capacity hot water storage designed for larger homes and light commercial applications.
Duplex 2304 Stainless Steel
High-grade Duplex 2304 stainless steel provides the stated cylinder construction.
Rapid Heat Recovery
The large surface area coil is designed to provide rapid heat recovery, with a stated reheat time of 40 minutes.
ERP C Rated
The cylinder has a stated energy efficiency classification of ERP C.
Applications & suitability
Large Family Homes
The 300-litre capacity provides substantial stored hot water for larger households and higher domestic demand.
Light Commercial Applications
Designed to provide high-capacity hot water storage for suitable light commercial applications.
Boiler-Based Heating Systems
The indirect cylinder design is intended for connection to compatible indirect heating systems such as boilers.
High Hot Water Demand
The large 300-litre storage capacity is suited to properties with significant hot water requirements.
Key specifications
| Nominal Capacity |
300 Litres |
| Height |
1750 mm |
| Diameter |
580 mm |
| Empty Weight |
61 kg |
| Full Weight |
355 kg |
| Standing Heat Loss (24h) |
2.22 kWh |
| Reheat Time |
40 minutes |
| Operating Pressure |
3 bar |
| Max Supply Pressure |
12 bar |
| Immersion Heater Rating |
3kW, 240V |
| Connections |
22mm Compression |
| Safety Features |
T&P Relief Valve, Thermostat Pocket |
| Energy Efficiency Class |
C |
Installation & compatibility
The Telford Tempest 300L is an indirect unvented hot water cylinder designed for connection to compatible indirect heating systems such as boilers. It features 22mm compression connections, a 3 bar operating pressure and a maximum supply pressure of 12 bar. The cylinder is also specified with T&P relief protection and a thermostat pocket, alongside WRAS-approved components.
Design & performance benefits
Duplex 2304 Stainless Steel
High-grade Duplex 2304 stainless steel provides the stated cylinder construction.
Large Surface Area Coil
The large surface area coil is designed for rapid heat recovery, with a stated 40-minute reheat time.
High-Density Insulation
High-density polyurethane insulation is designed to reduce heat loss from stored hot water.
2.22 kWh/24h Heat Loss
The stated standing heat loss is 2.22 kWh over 24 hours.
Additional installation features
T&P Relief Protection
The cylinder is equipped with a T&P relief valve as part of its stated safety features.
Thermostat Pocket
A thermostat pocket is included as part of the specified cylinder safety and control provisions.
WRAS-Approved Components
The supplied product information specifies the use of WRAS-approved components.
Ideal for
Large Homes
300 litres of hot water storage for larger households and higher domestic demand.
Light Commercial Properties
High-capacity hot water storage for suitable light commercial applications.
High Hot Water Demand
Designed for properties requiring substantial domestic hot water storage and rapid recovery.
Boiler-Based Systems
Suitable for compatible indirect heating systems using boilers as the primary heat source.
The Telford Tempest 300L Indirect Unvented Hot Water Cylinder combines high-capacity 300-litre storage with Duplex 2304 stainless steel construction, a large surface area recovery coil and high-density polyurethane insulation. With a 3 bar operating pressure, 40-minute reheat time, ERP C rating and lifetime cylinder shell warranty, it provides a dependable hot water storage solution for larger homes and suitable light commercial applications. Order now for a high-capacity Telford Tempest unvented cylinder.
