I've got a 15 year-old non-condensing combi boiler in a 2-bed semi, which has developed a controller fault.
I can replace the PCB or replace the boiler. If it was a condensing boiler, I'd replace it. But I'm wondering if replacing a non-condensing with condensing will cause additional work.
Obviously, I'll need to add a condensate pipe. But it's in the kitchen, so I expect that won't be too difficult.
But I believe the CH water temperature will be lower, so might I need to re-size the rads? Is this something that can be worked out with a rule of thumb, or is it generally not a problem? Is it possible to run with the water temperature at the same temperature as the old boiler and accept that it won't actually condense?