Hi all, we’re thinking of replacing our old Baxi Bermuda SL3 back boiler and I was wondering what other BISF-dwellers have done – what type of boiler, placement etc.
Originally we were planning on keeping the back boiler as the engineer who serviced it said they are very reliable and easy to repair. However the air vent it needs lets in a lot of cold air which makes the whole downstairs draughty in winter.
At the moment the back boiler heats hot water in a vented cylinder in the airing cupboard (the cupboard next to the flue in the main bedroom) and runs an 8 mm central heating system. I’ve replaced the oldest radiators with modern ones (they were probably more than 30 years old) and fitted TRVs to all radiators except the one next to the thermostat (there were none originally).
I’m thinking it will be best to stick with the present central heating system as it works, the radiators are all in sensible positions (on internal rather than external walls to minimise heat loss – nothing worse than a radiator right under a window!) and 8 mm pipe is the most that will fit between the ceiling and steel I-beams.
So the question really is stick with the hot water cylinder and get a heat-only boiler, or replace the cylinder too and get a combi boiler. And where to put the new boiler? The local housing association seem to have put them in the airing cupboard, based on the flue position on the roof, but as we still have an asbestos roof making a hole for a new flue doesn’t seem a good idea.
I was thinking of removing the cast iron flue upstairs and in the loft and fitting the new boiler where the boxed-in flue is now in a new cupboard that is the same sort of size. Then the new flue could use the old chimney.