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.

Combi = ****ing awful unless you get a huge one

Combis are good for a small house or flat. They can only realistically
supply a single outlet with hot water.

They are usually much larger than needed for heating so often cycle on
and off.