Description

200 Litre Copper Thermal Store  – Open Vented Hot Water Cylinder for Stoves with Back Boiler – (Requires a header tank)

Diameter: 540mm including insulation (450 under the insulation)

Height: 1500mm

Capacity: 200 litres

Separate header tank is required

Internal 3kw electric immersion heater included

Connections:-

1 x Flow and return 28mm boiler connections.
1 x Flow and return 28mm stove back boiler connections.
1 x 22mm cold and 22mm hot water draw connections to internal coil
1 x Flow and return connections to central heating circuit

Options:
Solar Coil 28mm £159.99 extra  Please ask before ordering
Additional 28mm tappings £59 extra per pair. Please ask before ordering
White Shell Case £149.99 (Comes with blue foam coating as standard)
External Copper Header Tank £199
Extra 3kw immersion (1 Included as standard) £149.99
Prices note – Prices inc. VAT

What is a 200 Litre Copper Thermal Store?

A Thermal Store is a hot water cylinder, used for storing hot water for domestic consumption and to heat a central heating system, however unlike a traditional hot water cylinder the water within the tank / cylinder is never consumed. Instead of using, or consuming the hot water within the thermal store, it is held as a reservoir of hot water that is used to heat your domestic hot water and your central heating system. The hot water that is held with the thermal store is the same water that is pumped around the central heating system. There are a number of advantages to installing a Thermal Store over a conventional hot water cylinder. 

A Thermal Store will provide mains pressure domestic hot water, without the perils of having an un-vented / pressurised hot water system. This is because the domestic hot water that goes to your hot taps is created from mains pressure cold water passing through a sealed coil within the Thermal Store. The mains cold water is heated by the hot water that surrounds the coil as it passes through the coil. 

This means that unlike with a conventional vented or un-vented hot water tank, you don’t consume or use the hot water in the Thermal Store, and therefore there is no requirement to replace the hot water with cold mains water, which on a convention cylinder then cools the remaining hot water. This means that recovery heat up time is much shorter as the reservoir of water within the Thermal Store is always kept hot, thus making the appliance very efficient.

A further advantage of having a Thermal Store is that you can easily introduce multiple heat sources to combine their resources. For example you can link the thermal store to a gas or oil boiler and a wood burning stove with back boiler and Solar Thermal and a heat pump, therefore using different and alternative sources of heating to suite the time of year and your preferential requirements. Essentially you can have one, or numerous sources of heat channeled in to a Thermal Store.

In addition you can connect the Thermal Store to more than one heating outlet, for example you might want to connect to an underfloor heating circuit and to a separate wall hung radiator central heating system. Thermal Stores work best when they are tall and narrow, against being short and wide, this is because the water in the tank will be hotter at the top than it will at the bottom. When connecting underfloor heating it is preferential to make the connections lower down the tank, where the water is cooler, because typically speaking underfloor heating is most efficient at around 50 degrees. However when connecting wall hung radiators it is preferential to connect the circuit further up the tank where the water is hotter. 

Thermal Stores are also normally equipped with an electrical immersion heater, to allow electric heating when non of the heat sources are providing heat, or for use as a method of topping up the temperature of the Thermal Store.

How a Thermal Store Works

The water in the cylinder ‘the store’ is heated to and maintained at 76^oC by the heat source which can be a boiler, immersion heaters or solar themal (NB Solar Thermal is optional and must be requested when ordering – extra £159.99).

Cold water at mains pressure is fed through a heat exchanger / coil in ‘the thermal store’ (a high efficiency coil). The cold mains water is heated by the surrounding hot water as it passed through the heat exchanger / coil and is them supplied to the taps at a thermostatically controlled 51^oC.

Thermal stores are highly efficient and heat loss is kept to minimum due to the high density CFC free foam installation, meaning minimal heat loss when the thermal store is at rest. This keeps running costs very low because you only heat the water you use. The key to using a thermal store in the most cost effective and efficient manner is to maintain ‘the store’ temperature at a constant 76^oC by means of the chosen heat source. This will ensure that ‘instant’ hot water, at mains pressure, is available whenever required; no waiting for the cylinder to heat up.

Thermal stores do not require G3 Building Control Notification and unlike other stored mains pressure systems no special qualifications are required to install the unit.

Options:-

The water held in a Thermal Store is stored at normal atmospheric pressure, and is topped up by a header tank. Thermal Stores are available with a built in header tank. The header tank must always be located at a level which is higher than the tallest radiator or under floor heating circuit, otherwise the water would flow back in to the header tank. As an example where the Thermal Store is to be located on the ground floor of a property, with radiators on floors above, the header tank that will feed the Thermal Store must be located separately from the Thermal Store at a higher level than the highest radiator, but connected to the Thermal Store by connecting pipework. 

Choosing the size of a Thermal Store:

The greater the size of the Thermal Store the more hot water it can store. The greater the volume of stored hot water means the more thermal energy that it will store, which in turn means the less thermal energy you will draw from the store, when you turn on a hot tap or operate the central heating. In other words the temperature of the water within the Thermal Store will cool much quicker the smaller the reservoir of hot water is. Typically speaking a 3-4 bedroom house with 1-2 bathrooms will require a 300 litre Thermal Store.

Please note that a Thermal store is a “Bespoke” product and each one is made to order. We will contact you one we receive your order to confirm the specification of the Thermal Store you have ordered and to ensure that Thermal Store will meet your specific requirements in terms of the water ports. Please allow 14 days for delivery from date of order confirmation. Please also note that because every installation is different, you may need to purchase plumbing pipe connectors from a local plumbing merchants to complete the installation of a Thermal Store.

Not sure what you need.. Please Call 0161 439 1400.

Why Choose a Copper Thermal Store?

A copper thermal store is designed to act as a reservoir of hot water, providing instant mains pressure hot water and supporting your central heating system. Unlike conventional cylinders, the water inside the thermal store is never consumed; instead, it transfers heat to cold mains water as it passes through a high-efficiency internal coil, delivering safe and reliable hot water to your taps at all times. This design eliminates the risks associated with pressurised systems and ensures fast heat recovery, making it a safe and efficient choice for homes using multiple heat sources.

Features & Benefits

Generous 200 Litre Capacity: Suitable for small to medium homes, providing ample hot water for daily use.
Efficient Heating: Comes with a 3kw electric immersion heater for backup or topping up temperature.

Flexible Connections:

28mm flow and return for boiler and stove back boiler
22mm cold and hot water draw to internal coil
Flow and return for central heating circuit

Customisable Options:

Solar coil upgrade, additional tappings, white shell case, external copper header tank, and extra immersion heaters available.
Superior Insulation: Blue foam coating as standard minimises heat loss and maximises energy efficiency.
Supports Multiple Heat Sources: Easily integrates with wood burning stoves, gas or oil boilers, solar panels, and heat pumps.

How Does a Thermal Store Work?

The thermal store maintains a reservoir of hot water at a set temperature (typically 76°C). When you turn on a tap, cold mains water passes through an internal coil, is instantly heated by the surrounding hot water, and is delivered to your taps at a thermostatically controlled temperature—no waiting for the cylinder to heat up. This system also allows you to combine various heat sources for maximum flexibility and efficiency.

Sizing, Installation & Delivery

Header Tank: A separate header tank is required and must be positioned above the highest radiator or underfloor heating circuit.
Bespoke Manufacturing: Each 200 litre copper thermal store is made to order—please allow up to 14 days for delivery.
Professional Advice: Not sure which size or options you need? Contact our expert team for guidance.

Additional Information 

FREE Delivery: Available on orders over £100. Next working day delivery is available for orders placed before 2 pm. Please click here to check delivery to your area.

Explore our full range of products for more options that suit your home.

Need Assistance? Contact us for expert advice on 0161 439 1400.

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