Telford Tempest 300Ltr Indirect Unvented Cyclinder

Telford Tempest 300Ltr Indirect Unvented Cyclinder

The Telford Tempest 300Ltr Indirect Unvented Cylinder is a high-capacity, high-performance hot water solution designed for larger domestic properties. Built to handle the rigorous demands of multi-bathroom households, this 300-litre unvented cylinder ensures consistent mains pressure hot water across all outlets, providing an exceptional user experience even in homes with high-flow showers and deep-soaking baths.

UK-Manufactured Excellence: Duplex Stainless Steel

Quality and longevity are at the heart of the Telford Tempest range. Constructed from premium Duplex 2304 stainless steel, this cylinder offers significantly better corrosion resistance than standard 316L stainless steel or copper alternatives. The robust build eliminates the need for a sacrificial anode, ensuring a low-maintenance life cycle and long-term structural integrity.

Optimized Thermal Efficiency & Reheat

As an indirect unvented cylinder, this model is powered by your central heating boiler (gas, oil, or electric) via a high-efficiency corrugated internal coil. The coil's design maximizes the surface area for heat exchange, resulting in impressive reheat times of approximately 50 minutes from cold. This ensures that even after heavy usage, your hot water supply is replenished quickly.

Key Features & Benefits

• 300 Litre Storage: The ideal capacity for large family homes (typically 4-6 bedrooms) with multiple bathrooms.
• Mains Pressure Hot Water: Delivers powerful flow rates of up to 55 litres per minute, maintaining pressure across the entire property.
• Industry-Leading Insulation: Encased in 60mm of CFC-free and HCFC-free injected polyurethane foam, keeping standing heat loss to a minimum.
• Complete Unvented Kit: Supplied with all necessary G3 components, including a 24-litre expansion vessel, dual high-limit thermostat, 3 bar inlet control group, and a two-port motorized valve.
• Lifetime Guarantee: Features a manufacturer's lifetime warranty on the inner cylinder shell, providing ultimate peace of mind.

Technical Specifications

• Material: High-Grade Duplex 2304 Stainless Steel
• Model Code: TSMI300
• Dimensions: Height: 1650mm | Diameter: 580mm
• Heating Type: Indirect (Boiler + 3kW Immersion Backup)
• Energy Rating: ErP Class C

The Telford Tempest 300L is a "fit and forget" solution that combines British manufacturing quality with modern energy efficiency. Whether you are upgrading an old vented system or installing a new high-pressure setup, this cylinder provides the reliability required for high-demand environments.