The 22mm out and in on the boiler are for the distibution network most of the individual rads comming off this network will be in 15mm. As you are entirely ignorat I suggest you ask aroud for a reliable engineer to check over your system as it may have to be amended. A well designed system takes...
No one with any proffessional integrity would install a boiler with out first checking out the system and idicating any necessary changes that would neeed to be affected at the time of installation It would appear that your Mother has found a Cowboy.
looking into getting some new boilers. Any feelings on:
Remeha Broag
Viessmann
Vokera Unice 36
Ferroli _ I used to like the Ferroli with the 2 pumps i for CH 1 for water
Of course there is the Vaillant/Bosch but tend to be more expensive
Any feelings on Potterton/baxi? ostensibly home...
What this guy is asking me to have done is:
1. Change the gas pipe to 22 mm supply from meter, which is a good 10 metres atleast.. He said thats the legislation and he can only certify the system after that.. he also reckons that boiler would be more effiecient if gas pipe is changed from 15...