I installed Evohome over 2 years ago. I am now looking to replace a 16 year old boiler with either a Viessmann, ATag or Intergas product using an Opentherm connection. I know that the Viessmann 100 needs a HW junction box for HW priority; the Atag needs an EBus to Opentherm converter and Intergas only needs the Honeywell Opentherm bridge.
I am leaning towards the Intergas but there are reports on various forums that the Intergas boiler has problems coping with Evohome multi-zoning (I have 12 zones and 19 radiators). There are also suggestions that it would be better just leaving my existing 2 BDRs in place (on a 'S' unvented cylinder plan) with an Intergas boiler with weather compensation. I assume that in this configuration the boiler would provide HW priority to heat the unvented cylinder?
Grateful for any advice on boiler choice/configuration would be appreciated. Thanks.
I am leaning towards the Intergas but there are reports on various forums that the Intergas boiler has problems coping with Evohome multi-zoning (I have 12 zones and 19 radiators). There are also suggestions that it would be better just leaving my existing 2 BDRs in place (on a 'S' unvented cylinder plan) with an Intergas boiler with weather compensation. I assume that in this configuration the boiler would provide HW priority to heat the unvented cylinder?
Grateful for any advice on boiler choice/configuration would be appreciated. Thanks.