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Great Thanks ! So taking all the above into consideration, it would be sensible to : 1) Upgrade current boiler to 18-20kw System which is the most efficient boiler for my home or invest in a larger boiler and have it down rated to allow for future expansion. 2) Put in a large 210-300l...

We have 14 radiators in total. We had the mains pressure tested and the plumber said it was ok for an unvented system. We have a cold water storage and feed tank in the loft. When we use 2 showers at the same time the pressure drops off. If i use the calc 14 rads x 1.5kw = 21kw +...

I have a vented 114litre cylinder in the airing cupboard. Not sure what you mean about control system ?

Hi I live in a 4 bedroomed detached house which currently has a perfectly working Baxi Solo 15Kw Conventional Boiler running approx 14 rads. Currently experiencing low pressure and sometimes lack of hot water when 2 adults and 4 kids (aged 10,8,3,1) are trying to get ready for work,school...