Our Thermal Store units are, as the name implies, a tank designed for efficiently storing large quantities of hot water until it is required. The key difference between a thermal store and a standard domestic unit is that the thermal store utilises a large finned coil connected direct to the mains water supply via the external pipework. This external pipework is also used to draw off hot water at mains pressure via an adjustable mixer valve. The thermal store excels in it's versatility in that a variety of different connections and coils can be added as well as the option to be made out of different materials with the additional benefit of these being used for secondary heating sources.
Thermal stores are also available in combination type in which the cold water expansion tank is attached to the unit, removing the need for an external header tank if space is restricted or difficult to install.
If space is too restricted to accommodate a thermal store cylinder, we also manufacture rectangular thermal stores known as the "Cubination" This alternative model allows for all the benefits of a thermal store whilst maximising the utilisation of space.
All thermal store units are supplied with immersion heaters (two on direct models), drain valve, expansion vessel, thermostatic blending valve & ball valve (combination model only). Optional extras such as aqua control thermostat, pressure reducing valve, in-line strainer and a stainless steel case finish are also available.
In addition to having the components required for solar heating, the Solar Thermal Store has a number of direct tappings which can be used for heating the stored water by various other means, such as, woodburners, pellet/ biomass boilers, range cookers, or other gravity circulating applications. These direct tappings can also be used to take heat from the stored water for the purpose of heating the premises via open vented radiator circuits, heat dump or under floor heating circuits. The same can be done indirectly by fitting the Solar Thermal Store with a high efficiency coil, allowing the radiators and/ or underfloor heating circuits to be installed as sealed systems. However if the customer requires a bespoke Solar Thermal Store to be manufactured to their specification with extra connection ports or ports omitted, we can offer such a unit.
Approximately 50mm ODP foam insulation is applied as a standard, giving heat loss performance well above that required by EU Energy Rated Products. However this can be increased if required to 75mm or 100mm as well as the option of a steel case as previously mentioned.
The most common sizes that we manufacture are listed on the size and specification tab with their respective capacities, However such is the flexibility of copper we can offer bespoke heights and diameters where space or water volumes are critical.
Matching customers' requirements is particularly important when space is at a premium, so the most common customisation for a hot water cylinder, is the “mixing and matching” of the various heights and diameters that we offer. As additional parts of a Bespoke design, the customer is able to specify a number of options including coil sizes (where applicable), connection sizes/positions, insulation thickness, whether it is manufactured from copper or stainless steel (see our Copper vs. Stainless Steel page for a comparison), and the finish of the unit (the metal case being the premium option). It is also possible to combine different types of cylinders to result in the optimum solution for your individual situation. We can offer design drawings prior to manufacture to ensure that all connection sizes, positions and functions are to the customer's requirements.
See our Bespoke Products page if you require a unit which may be slightly out of the ordinary and please contact us if you require any advice.
This calculator is designed to assist the specification of a cylinder by determining the amount of hot water available from a cylinder of a specific size; this can be particularly useful in situations where space for a cylinder is limited.
Uninsulated Diameter Calculator
This calculator is designed to assist the specification of a cylinder by determining the size of the cylinder from it's circumference and insulation thickness; this can be particularly useful in situations where a replacement cylinder is required, but due to the insulation it is difficult to determine the size of cylinder required.
Please note - The final figures are approximate and should be rounded to the nearest standard diameter (375,400,450 etc.)
To assist with determining the correct size connection for replacement units or units to fit your current system, we have created a table of external and internal thread sizes.