I have a gas heated, vented CH system. The problem I have at present
is the radiator, ground floor, furthest from the boiler only ever get
slightly warm. The hot water tank is the first floor and the cold
water and header tank are in the loft. How can I overcome this
Paul the D
'You're a big man, but you're out of shape. With me it's a full time job. Now
You will need to balance the system out, so that every radiator is getting
the full flow of hot water around them, and not being prioritised by the
lower resistances around some parts of the heating circuits.
If you turn off all the radiators at the return side (out flow) valve, and
then while you turn them on again, count how many full turns it takes to
fully open them up. You can place a pencil mark on one edge of the valve
head and count how many times it passes a particular spot in the room.
When you find out how many turns it takes to fully open them from fully
closed, then you turn them half way. So that means from fully open, you
would turn them half the amount of turns it takes to fully close them.
Example: From fully open it takes 6 turns to fully close the valve, so to
get the valve to open half way, you turn it fully open, then turn it 3 times
to get it half way.
Do this with all the radiators and see if it makes a difference. You should
be able to pick the hottest radiators after doing this, and make small
adjustments to the return valves to balance the heating out around all of
It is either because there is sludging in the system, or more likely
because you only mention one radiator as affected, that the system is
This is an easy, although a bit time consuming process.
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