The 12kW version is identical in appearance and has 33% more heating power, so is usually found in larger apartments.
Unfortunately fault tracing for the 12kW version is not adequately described in the manual and I no longer offer a repair service for it.
Copyright Michael Bryant 2020
Site first created 31st December 2006
Last updated 26th October 2020
Gas Safe Register 197499, CIPHE registration number 56207