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central heating ,it is an open system I want to ?

i have oil fired central heating ,it is an open system I want to
convert it to a closed system could you let me have as much detail as possible

les
March 2010
Heating, Home Heating SystemsHeating Oil Fired
You have to have a G3 unvented certificate to attempt this work( over 15 litres). This is a Building Regulation

tyemanone
March 2010

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Worcester boiler dripping water?

Worcester boiler dripping water, can I just tight the screw? The icon next to the valve looks like radiators... [Read more]
Mend Heating, Home Heating Systems

Vaillant ecotec 831 plus?

Following a F22 fault where we had no heating and only cold water from the hot water tap, I topped up the syst... [Read more]
Mend Heating, Home Heating Systems

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My temp is showing on the reciever alot higher than it actually is & each time I turn the temp up to get the h... [Read more]
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Boiler cycle?

My boiler only fires up for about 90 seconds greenstar 4000
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