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Solar photovoltaic (PV) systems convert the Sun's energy into electricity that can be stored in
batteries or converted by and inverter for use in mains connected properties.

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Solar Cylinders
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Solar Thermal systems convert energy from the sun into stored hot water for later use.  

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  1. Direct Unvented (8)
  2. Indirect Unvented (8)
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  1. Gledhill (26)

Unvented Cylinders

Gledhill's unvented cylinders are made of stainless steel and come as either indirect or direct models.

What are unvented cylinders?
Unvented cylinders that do not have a header tank as with traditional systems.  Instead they are plumbed directly to the mains cold water feed which provides the pressure.  Due to the nature of these systems and the fact that they are pressurised, installations must be notified to the local authority in England and Wales and must be performed by someone holding a G3 certificate.

What is a Direct Cylinder?
A direct cylinder is one that is primarily heated by means of immersion heaters that are installed on the cylinder.  No other form of heating other than solar (if a solar coil is fitted) is used. 

What is an Indirect Cylinder?
A indirect cylinder is heated by an external source such as a gas or oil boiler.  A coil within the cylinder transfers heat from the external source to the water stored within it.  Indirec cylinders can also be by solar if a solar coil is fitted during manufacture.

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