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The simplest way to deliver mains pressure hot water

With as little as two pipe connections – cold in and hot out – the PANDORA offers full mains pressure performance without the hassle.

Thermal Stores quick to install

Quick to install

Patented discharge-free design means our thermal stores can be installed in a fraction of the time of unvented cylinders. They can also be fitted into awkward or tight spaces not suited to conventional systems.

Thermal Stores safer systems

Safer systems with no need for annual servicing

Thermal stores are not pressurised – stored water is at atmospheric pressure with a vent to atmosphere. They are therefore not bound by the safety regulations that apply to pressurised unvented systems.

Thermal Stores high performance

Fantastic performance

Heat exchangers transfer heat extremely quickly, ideal for mains pressure showers and fast filing baths.

Because heat is always stored in the same water, they do not experience the problems of limescale build-up associated with other types of hot water storage system.

Perfect for both replacement and new-build

Our PANDORA was designed for performance and ease of installation by designing out the need to top up water storage, and removing the requirement for a safety discharge pipe and the complicated G3 regulations governing them.

The PANDORA has been used extensively within new build for provision of hot water using either electric elements, local boilers, or district heating.  This is down to the speed they can be reliably installed with minimal training.

Photo: Queensland Road development in Highbury, London
354 HEATBANK PANDORA District units connected to a centralised boiler plant via plate heat exchanger, providing mains pressure domestic hot water and a local central heating circuit without any discharge pipes. Electric backup to both hot water and heating.  read more…

Exceptional reliability and performance provided by better technology

A thermal store is a cylinder used to store thermal energy, typically filled with primary central heating water. Increasingly popular in domestic settings, thermal stores operate by drawing mains pressure cold water through a high efficiency heat exchanger to supply heating and high-pressure hot water.

  • Fresh mains water supplied to both hot and cold taps
  • Instant heat and mains pressure hot water
  • Low running costs
  • Fit-and-forget reliability
  • No need for annual servicing
  • No risk of Legionella

The original and best

Our patented HEATBANK thermal store system is the original plate heat exchanger design, with more than 10,000 installations and proven reliability and performance.

Standard Electric

Providing over 100kW of mains pressure hot water using electric immersion heaters, the PANDORA Electric is as simple as it gets.  Options cover storage sizes, numbers of elements, fitted immersion heater controls, solar coils, and low load central heating circuits.

Electric HB2000

Providing mains pressure hot water and central heating, using electric immersion heaters, the PANDORA Electric HB2000 is driven by up to four 3kW elements. Connections from the store are used to drive central heating using either stored heat or directly off elements.


Indirectly heated through a primary coil, for use with standard boilers.  The PANDORA Indirect options cover storage sizes, backup electric elements, fitted heating controls (pumps & valves), solar coils, and high duty input or output circuits using plate heat exchanges.

District Heating

Advanced domestic thermal storage, providing an easy install prefabricated system with twin plate heat exchanger assemblies. The PANDORA District provides very high hot water output, with electric backup for both hot water and central heating. Options cover heat metering, differential pressure control, or custom control sets.

Talk to the experts – call us now on 0345 241 1441 or email

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