I currently have a gas open-vented central heating system with radiators (10mm pipework) in a house built in 1988.
I'm thinking of having the boiler changed and swapping to a sealed system (to increase shower pressure).
Will this simply invovle a flush out of the system then changing the...
My old gas back boiler has packed up and am considering a combi/condensing one.
Are the so called "Instant" boilers with a pre heater such as:
Baxi 80HE Instant or
VOKERA SYNTESI 25e
Much better than non instant. I just remember at my friends' house wiith a combi boiler having to wait...