Telford Tempest 300L Indirect Heat Pump Cylinder

Description

The Telford Tempest 300L Indirect Heat Pump Cylinder is designed to work efficiently with air source heat pump systems, providing reliable mains pressure hot water for larger homes and demanding domestic applications. Its purpose designed 3m² heat exchange coil supports effective renewable energy transfer, while the durable Duplex stainless steel construction offers excellent corrosion resistance and long term reliability.

Supplied with a factory fitted 3kW immersion heater, remote expansion vessel and full unvented cylinder components, this high capacity cylinder provides a practical hot water solution for heat pump installations. A 3 port valve is not included and must be purchased separately.

Key Features

Heat Pump Compatible

Designed for use with a range of air source heat pump systems.

300 Litre Capacity

Provides generous stored hot water capacity for larger households.

Efficient 3m² Coil

The large surface area coil supports effective heat transfer from renewable systems.

Duplex Stainless Steel

Offers strong corrosion resistance for dependable long term performance.

3kW Immersion Heater

Provides supplementary or back up water heating when required.

Mains Pressure Hot Water

Supports strong flow rates throughout the domestic hot water system.

Full Unvented Kit

Supplied with key safety and control components for an unvented installation.

Reduced Heat Loss

Factory applied insulation helps retain stored hot water efficiently.

Technical Specifications

Specification	Details
Product type	Indirect heat pump cylinder
Brand	Telford
Range	Tempest
Product code	TSMI300/HP
Nominal capacity	300 litres
Height	1,780mm
Diameter	580mm
Empty weight	44kg
Approximate full weight	338kg
Heat exchanger coil area	3m²
Immersion heater	3kW factory fitted
Cylinder material	Duplex stainless steel
Coil and fitting material	316L grade stainless steel
Coil and fitting size	22mm compression connections
Standing heat loss	2.22kWh/24 hours
Maximum supply pressure	12 bar
Maximum primary pressure	3 bar
Temperature and pressure valve setting	7 bar / 90°C

Included Components

• 3kW immersion heater.
• Temperature and pressure relief valve.
• Acetal tundish.
• Inlet group control.
• 2-port valve.
• External expansion vessel.
• Dual-probe thermostat.
• Wall-mounting bracket for the expansion vessel.

Suitable Applications

Larger Homes

The 300-litre capacity is well suited to households with higher hot-water demand.

Air Source Heat Pumps

A practical hot-water storage option for renewable heating installations.

New-Build Properties

Supports efficient domestic hot-water design in modern low-carbon homes.

Trade Installations

Supplied with essential unvented components to support professional installation.

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Room Dimensions

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Insulation Level

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