Hi everyone, I am a new home owner, that came with an Old baxi bermuda 401 back boiler. I currently do not have the money, to upgrade to a condensing combi. However....the old boiler works great, with the gas engineer claiming that it is excellent condition. I would like to upgrade the old programmer ( a Drayton lp112) with something newer. The current system has no room thermostat, so I was wondering if something like the Drayton 720r, with wireless room thermostat would be compatible with my old system....with gravity fed hot water. A smart system would be excellent, but a programmer with wireless thermostat, would be much better than my blotchy old programmer! My current old programmer has a mind of its own, and I can't seem to turn off set programs either. Thanks for reading!