System boiler or conventional when replacing combi
On 11/02/2019 17:55, Fredxx wrote:
On 11/02/2019 17:45, Chris B wrote:
On 11/02/2019 16:50, The Natural Philosopher wrote:
On 11/02/2019 16:46, Fredxx wrote:
On 11/02/2019 14:44, Darksyphon wrote:
Large extension added to my 3 bed property. Combi has been a pain
in the arse
and now won't cut it with 2 main bathrooms.
My question is should I go for a system boiler with an unvented
cylinder or
get a conventional boiler and have pressurised ch and again an
unvented hot
water cylinder?
Plumbing in the extension hasn't started yet and I plan to put the
unvented
cylinder in the gurage.
My plans were for the system boiler but I met a plumber who said to go
conventional.
A system boiler implies a conventional system. You have a choice of
unvented, vented or thermal store.
I went for the thermal store as the cylinder isn't pressurised so
doesn't need inspection and testing while still having high pressure
hot water.
TBH I suppose I just did the first inspection and test of my
pressurised cylinder in 16 years after replacing all the pressure
bits... :-)
Personally I'd still go for a pressurised system
Thermal store almost as good.
Can depend on location.Â* Thermal store in old house suffered from
major scale up in the small bore pipes that run through the thermal
store to provide HW.Â* Filling a bath ended up being so slow that water
was cooling down faster than hot water being supplied.Â* Just barely
acceptable for shower or washing up.Â* Probably worse than a combi. A
Water softener may have helped but there wasn't one fitted,
Might have been a pain to do but I don't see a problem with running a
descaler through the coils.
I think the difficulty is the problem.
--
€œIdeas are inherently conservative. They yield not to the attack of
other ideas but to the massive onslaught of circumstance"
- John K Galbraith
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