Hi, I am replacing our 11 year old boiler (due to H.Ex. leak) with a new one. This is in a "sealed" system with red expansion vessel in airig cupboard & a megaflo (no tank in loft). However the exisiting boiler is Vaillant ecoTEC 4xx boiler - which is satated by vaillant as an "open vent" boiler (has no internal pump). So at least in theory I have been running with the "wrong" boiler for 11 years...??
I have asked for quotes from 2 local plumbers and initially they both recommended to replaced like for like and stay with the same boiler.
This is a large house mainly with UFH (3 manifolds and 3 small rads upstairs).
Just heard from one of them that he now realised I need a "system" boiler and therefore I should fit an ecoTEC plus 6 (not 4!)
Question(s):
Can I install an "open vent" boiler in a sealed system without invalidating new boiler warranty?
If I can not and it must be defined as a "system" boiler, what do I do with the exsiting CH pump (in airing cupboard)?
Can the existing pump be made to work with the internal pump of the system-boiler?
Is there a risk the 2 pumps will create too much pressure in new boiler?
Thanks in advance!
I have asked for quotes from 2 local plumbers and initially they both recommended to replaced like for like and stay with the same boiler.
This is a large house mainly with UFH (3 manifolds and 3 small rads upstairs).
Just heard from one of them that he now realised I need a "system" boiler and therefore I should fit an ecoTEC plus 6 (not 4!)
Question(s):
Can I install an "open vent" boiler in a sealed system without invalidating new boiler warranty?
If I can not and it must be defined as a "system" boiler, what do I do with the exsiting CH pump (in airing cupboard)?
Can the existing pump be made to work with the internal pump of the system-boiler?
Is there a risk the 2 pumps will create too much pressure in new boiler?
Thanks in advance!
