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Indirect Unvented

Indirect Unvented

Our cylinders are specifically designed for solar applications in mind, therefore providing an efficient way of providing domestic hot water. Each model features a dedicated high performance solar coil, transferring the maximum amount of heat from the solar circuit to the stored water. 

Our cylinders are compatible with all our Prestige Solar Thermal packs and have been designed to maximise the dedicated solar volume.

The direct models are electrically heatedcylinders, using the 3kW immersion heater supplied with the unit, with a high performance solar coil. They are capable of meeting the requirements of Building regulations, provided that it is matched to the panels and the hot water requirement correctly. The indirect cylinders are heated by a conventional boiler (either gas or oil) through a second high performance coil

Quality Standard

All our unvented stainless cylinders are
manufactured in accordance with BS EN 12897
the specification for unvented water storage
vessels. The cylinders have been tested by Kiwa
which is a member of the European Organisation
for Technical Approvals and comply with
current UK Building Regulations G3 and Water
Regulations, in performance it complies with the
requirements of BS 6700 and meets the NHBC
criteria for domestic properties.

All cylinders are supplied with
  • Immersion heater (s)
  • Wiring centre (indirect)
  • Inlet control set
  • Expansion vessel kit
  • Temperature and pressure relief valve
  • Control thermostat and drain valve
  • 2 port zone valve (indirect)
  • Dual thermostat (indirect)
  • Tundish
  • Installation manual & benchmark log book.
Duplex Stainless Steel

Using the latest high specification Duplex stainless steel to resist all forms of corrosion including crevice and stress whilst its high mechanical strength gives it durability. 
The very latest automated welding procedures along with full post weld treatments guarantee welds that are as strong as the metal.

All cylinders are factory pressure tested to a full 12 bar which is four times the normal working pressure.

Corrugated Stainless Steel Coil

We use a high heat transfer corrugated tube heat exchanger to give a 20% faster recovery than plain tube heat exchangers, it is also lighter & stronger than plain tube making the storage cylinder the lightest and easiest to handle on site.

Maximum Capacity

An inbuilt diffuser reduces turbulence when cold water enters the storage by baffling the flow, the end result is that the hot water output is equal to the capacity, a 180 litre cylinder will produce 180 litres of hot water!

Heat Loss

All our cylinders are manufactured using the latest HCFC free Enviro-foam insulation, tests show that 50mm of Enviro-foam injected into the case and covering both dome achieves astonishingly low levels of heat loss which ensures it fully complies with the 2010 Part L requirements for both new build and replacement cylinders.







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