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Unvented Cylinder

Joined
31 Jan 2005
Messages
213
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3
Location
Fife
Country
United Kingdom
Dear all,
Can someone please tell me what the difference is between a direct and indirect unvented cylinder?

Thanks

V
 
A direct cylinder will be heated by an immersion heater (or 2) whilst an indirect cylinder has an internal coil fitted which is connected to the primary heat source water, ie a boiler of some sort.

The heated water passing through this coil heats the water in the cylinder around it, but never mixes with it.
 

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