Jaspi ThermoStore 500, 700, 1500, 2000 & 3000 litres

Jaspi ThermoStore thermal storage tanks have a high efficiency, heat moulded insulation for superior performance.
Design and location of the connections ensure efficient thermal layering and easy installation


Jaspi ThermoStore



Impressive in size and thermal qualities. Round Thermostore accumulators are large enough to handle any heating load and multiple connections.

Domestic hot water is heated on demand with a high-efficiency Stainless Steel Coil running a mains pressure up to 10bar. If the hot water demand is a particular high, or the tank is kept on a lower running temperature (solar, heat pumps) the ThermoStore can be equipped with a second, pre-heating coil. This can also be easily added to the system later on for example if the number of bathrooms is increasing or an annex is built.

Larger ThermoStore tanks can supply several separate heating circuits. This is particularly useful when an additional living space is built or when the user wants to have full control over different parts of the building or a garage / office space.

In district heating applications ThermoStore is the 'hub' of the heating system. Heating to several flats, offices or industrial units can be supplied from a single point, meaning that only one or two heat sources are needed and the system can be easily maintained and managed. This offers substantial savings over the traditional heating system where all the units have their own heating system/boilers. This leads to lower installation and maintenance costs with an added benefit of future expandability.

Solar heating is connected via a solar coil at the lower part of the store. This can also be added on at a later stage without changing the tank.


Jaspi ThermoStore 500 & 700

500 & 700 litre ThermoStore units are designed to work with radiator, underfloor and combination central heating systems and all available heat sources.

They are designed to reduce the installation floor space and can fit through most of the standard doors. High-efficiency Stainless Steel domestic hot water coil provides ample, mains pressure hot water.

In addition to the included DHW coil, two more coils can be added; One additional domestic hot water coil (Stainless Steel) and one solar coil to the lowest part of the store (Copper).

500 & 700 litre ThermoStore tanks can be fitted with two back-up immersion heaters, one for daytime top-up use and another for night-time cheaper tariff heat charging. Immersion heaters come in 3 kW, 4,5 kW & 6 k W variations.

Jaspi-ThermoStore is essential for any heating system that uses two or more heat sources and will supply the domestic hot water & radiator + underfloor heating from a single unit.


Jaspi ThermoStore 1500, 2000 & 3000

1500, 2000 & 3000 litre Jaspi-ThermoStore systems can be used for larger houses, multiple heat circuits (for example separate flats or office units) and Industrial installations. They are shaped for optimum heat distribution throughout the tank and will provide market leading expandability for multiple heat sources, system monitoring and thermal efficiency.

These ThermoStore tanks can be fitted with up to four back-up immersion heaters for daytime top-up use or cheaper rate night time heat charging. Immersion heaters come in 3 kW, 4,5 kW & 6 k W variations. ThermoStore tanks are also fitted with one high-efficiency Stainless Steel indirect hot water coil.
Any heat source can be fitted to the system either directly or by the means of up to three indirect coils. This way the ThermoStore can always be charged with the heat source which is the cheapest / available at any point (e.g. Biomass, Solar, Wind or Heat Pumps).

Additional information

ThermoStore tanks are supplied with one 22mm Stainless Steel top coil (78kW@80°C) as standard. The standard coil is fitted onto a flange on the top of the store. This coil can also be moved to the lower part of the store if connected to another heat source like a smaller wood burner

Middle coil, 2/3 down on the tank, is often used for domestic hot water pre-heating or wood stoves etc. This coil is fitted with a flange and can be easily retrofitted or changed.

 Lowest coil, normally used for solar, is fitted from inside the tank which is usually done at the factory.  It can also be added later on but requires slightly more installation work.

For ThermoStore 500 & 700 the maximum coil size is 22mm . Larger 1500 & 2000 ThermoStores can have coils up to 1½", the largest ThermoStore 3000 can have all the above and also the most powerful 50mm 2" coils up to the power of 470kW. Larger coils are special order items, please contact us for further details.

ThermoStore tanks are delivered with a lifting hook that can be fitted to the 1" coupling on top of the store.

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Product details
ThermoStore 500, 700

Model 500K 700K
Capacity (l) 500 700
Weight (kg) 170 200
Coils as standard 1 1
Max. coils 3 3
Height mm 1880 2030
Width mm 790 870
Depth mm 790 870


Product details
ThermoStore 1500, 2000 & 3000

Model 1500K 2000K 3000K
Capacity (l) 1500 2000 3000
Weight (kg) 350 400 500
Coils as standard 1 1 1
Max. coils 3 3 3
Height mm 2160 2180 2310
Diameter mm 1260 1410 1610


Download brochure    




Immersion heaters

ThermoStore accumulators can be equipped with up to six immersion heaters. These heaters are used for heating back-up, heat dump from the solar PV panels / wind turbines or frost protection.

Our immersion heaters have 3 heating elements each, for example the 3kW version has three 1kW elements. This greatly improves the heater reliability and flexibility.
They also have an adjustable thermostat, main switch, heating indicator and overheating protection.

Download immersion heater instructions

Installation packs

Our installation packs include all the blank plugs in brass or iron, air vent, drain plug and pressure relief valves  for the store & domestic hot water.




All of our large products like the thermal stores and boilers are delivered directly from the factory to the customers.
Most of them will also need a forklift or similar for unloading.
More information can be found from here:

How to purchase

All our standard products can be ordered through this website. Please find out how to order by following this link:


NORTHMAN JASPI UK  01392 247 343