I expect you have a lease so first check the lease, if you don't have a copy ask to see a neighbours and failing that get a copy from HM Land Registry. If you don't find your answer in the lease you need to get 'office copies' for the Freehold. They should confirm, or not, if there is any...
I have a Baxi Combi 80 Eco. The water seems to work fine and the heating is okay. The unit seems pretty basic and has no thermostat, the temperature is set using a knob on the front of the unit. The problem is if the knob is set at or beyond the midway point the boiler makes a strange...