The Telford Tempest Heat Pump Cylinder 250L – TSMI250/HP is designed to provide an efficient hot water solution optimised for heat pump systems. With a 250-litre capacity, high-grade duplex stainless steel construction and a large coil surface area, this unvented cylinder is designed to meet the hot water requirements of medium to large households.
Constructed from high-grade duplex stainless steel, the Tempest heat pump cylinder combines durability with reliable performance. Its 3 m² coil surface area supports efficient heat exchange, while the low 83 W standing loss contributes to improved energy efficiency.
250 Litre Capacity Heat Pump Optimised Duplex Stainless Steel ErP C Rated
Applications & suitability
Heat Pump Systems
Designed specifically as a hot water cylinder solution optimised for heat pump systems.
Medium to Large Homes
The 250-litre capacity is suited to medium and large households with higher hot water requirements.
Indirect Heating
The indirect configuration is designed for integration with suitable indirect heating systems.
Domestic Hot Water
Provides stored hot water capacity for domestic applications requiring a larger cylinder.
Key specifications
| Model Number |
TSMI250/HP |
| Capacity |
250 Litres |
| Height |
1800 mm |
| Diameter |
554 mm |
| Weight |
55 kg |
| Standing Loss |
83 Watts |
| Orientation |
Vertical |
| Vented / Unvented |
Unvented |
| Cylinder Material |
High Grade Duplex Stainless Steel |
| ErP Rating |
ERP - C |
| Range |
Tempest |
| Indirect / Direct |
Indirect |
| Colour |
White |
| Mounting |
Floor-Mounted |
| Coil Surface Area |
3 m² |
| Pressure Reducing Valve |
7 Bar |
| Pressure |
3 Bar |
Installation & compatibility
The Telford Tempest TSMI250/HP is an indirect unvented cylinder designed for integration with heat pump systems. It is floor-mounted and vertically oriented, with a 554 mm diameter and 1800 mm height. The specified pressure reducing valve is 7 Bar, while the cylinder pressure is specified as 3 Bar. Installation should be carried out by a suitably qualified installer in accordance with the system requirements.
Design & performance benefits
Large 3 m² Coil
The large 3 m² coil surface area is designed to support efficient heat exchange with the heating system.
Low Standing Loss
An 83 W standing loss is specified to support improved energy efficiency during hot water storage.
Duplex Stainless Steel
High-grade duplex stainless steel construction provides a robust cylinder material for long-term hot water storage.
250-Litre Capacity
The 250-litre capacity provides substantial stored hot water for medium to large households.
Additional installation features
Floor-Mounted
Designed for floor mounting to provide a stable installation arrangement.
Vertical Orientation
The vertical cylinder configuration provides a practical format for installation planning.
7 Bar Pressure Reducing Valve
Equipped with a specified 7 Bar pressure reducing valve as part of the cylinder specification.
Ideal for
Heat Pump Installations
Designed as an indirect unvented cylinder solution optimised for heat pump systems.
Medium to Large Households
Suitable for homes requiring 250 litres of stored hot water capacity.
New Hot Water Systems
Suitable for installations where an indirect unvented cylinder is required as part of a heat pump system.
High Hot Water Demand
The 250-litre storage capacity provides a substantial hot water reserve for larger domestic requirements.
The Telford Tempest Heat Pump Cylinder 250L – TSMI250/HP combines a 250-litre capacity, high-grade duplex stainless steel construction and a large 3 m² coil surface area for heat pump applications. With an 83 W standing loss, vertical floor-mounted design and specified 3 Bar pressure, it provides a robust unvented hot water storage solution for medium to large households.
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