Telford Tempest 400 Litre Unvented Horizontal Indirect HEAT PUMP Cylinder

Tempest Heat Pump hot water storage cylinders are designed for use with an air or ground source heat pump as the main heat source. They feature a purpose-designed coil with a 2m² or 3m² surface area to allow maximum heat transfer of renewable energy into the stored water. Manufactured from Duplex stainless-steel, the cylinders are supplied with a factory-fitted 3 kW immersion heater to provide back-up heat.

• Duplex stainless steel provides superior corrosion resistance
• 316L grade stainless-steel 22mm compression fittings and coils
• Supplies mains pressure hot water and high flow rates
• Fast reheat
• Factory-fitted temperature and pressure relief value set at 7 bar / 90°C
• Remote expansion vessel with factory-fitted wall mounting bracket
• Full unvented kit supplied
• Highly efficient
• Fully insulated to minimise any heat loss
• Factory-fitted 3kW immersion heater 
• Lifetime manufacturing warranty on inner container (2 years on components)*
• Cylinders come complete with Cradles to sit in

Cylinders come complete with Unvented Kit which includes:

• Dual Probe Thermostat
• Factory-fitted 3kW immersion heater (250–500 litre cylinders supplied with additional off-peak immersion heater)
• External expansion vessel with mounting bracket
• Temperature & Pressure Relief on the cylinder
• 3Bar Inlet Control Group (Pressure relief valve included)
• 2 Port Motorised Valve
• Tundish