i live in stonecot - sutton london (SM3 area) and i want to know how much approximately it costs to have a back boiler replaced with a combi system for heating and hot water . costs to include equipment and labour... serious answers please and many thanks for any recommendations as well.
the pros and cons in above answer are correct, boiler fault no hot water, but today's combi's are much more reliable. the pressure thing is different, if you go for a combi it is a sealed pressurised system usually running up to 2 bar(30 psi) where your tank fed runs much lower less than 1 bar,the joints on your system will probably start leaking. plus going up to 22mm mains with 15mm branches to rads is more efficient
A combi boiler is ok if you do not require a lot of hot water at once,for large groups,families the back boiler or gas boiler is better,producing hot water on demand.The combi outfit does not have a hot water storage tank,taking up less room,there are several different types,some with expansion tanks ,others not and prices vary greatly for equipement from each source ,as does the installation charges.Some installers remove the old gear ,others leave it.You are better leaving it as it is,if you will not be staying there for long,but if you change it,then get several quotes locally for the total price of the equipement,the installation and testing, removal of rubbish and old equipement,then suit yourself.
