Telford Tempest Unvented Cylinder High Gain 250Ltr

Telford Tempest Unvented Cylinder High Gain 250Ltr

The Telford Tempest Unvented Cylinder High Gain 250Ltr is a high-performance hot water solution specifically engineered for homes transitioning to renewable energy. Designed to maximize the efficiency of air source heat pumps and ground source heat pumps, this 250-litre model provides a robust supply of hot water at mains pressure, making it the perfect choice for medium-to-large family homes with high demand.

Optimized for Renewable Heating

Unlike standard cylinders, the Tempest High Gain features an upgraded internal heat exchanger with a significantly larger surface area. This allows for exceptional heat transfer even when using the lower flow temperatures typical of heat pump systems. By facilitating faster recovery times, it ensures your renewable system operates at its highest possible COP (Coefficient of Performance), lowering energy costs.

UK-Made Duplex Stainless Steel

Built for longevity, the cylinder is manufactured from high-grade Duplex 2304 stainless steel. This material is renowned for its superior strength and resistance to corrosion compared to traditional stainless steel grades. The robust construction eliminates the need for a sacrificial anode, ensuring a low-maintenance "fit and forget" installation for homeowners.

Key Features & Benefits

• 250 Litre Capacity: Ideal for properties with 2–3 bathrooms and multiple showers.
• High Gain Corrugated Coil: Specifically designed to provide rapid reheat times (often 30% faster than standard versions) when used with low-temperature heat sources.
• Exceptional Insulation: Features 60mm of CFC-free injected polyurethane foam, providing industry-leading heat retention and minimal standing heat loss.
• Mains Pressure Performance: Delivers high flow rates of up to 55 litres per minute, providing powerful showers and fast-filling baths.
• Complete G3 Kit Included: Comes with a full unvented component kit, including an expansion vessel, 3 bar inlet control group, and dual-high-limit thermostat.
• Lifetime Guarantee: Backed by a lifetime warranty on the inner cylinder shell, reflecting the premium British build quality.

Technical Specifications

• Material: Duplex 2304 Stainless Steel
• Capacity: 250 Litres
• Model Type: High Gain Indirect Unvented
• Reheat Time: Approx. 18–20 minutes (depending on heat source)
• Energy Rating: ErP Class C

If you are upgrading to a heat pump system, the Telford Tempest High Gain 250L offers the efficiency and reliability required to get the most out of your investment.