A condensing boiler precis
A condensing boiler precis
A condensing boiler is a efficient advanced boiler that incorporates an extra heat exchanger to enable the hot exhaust gases transfer a percentage of their contained energy to pre warm the cold water input. Once running at a good efficiency, the water gases developed in the working process turns revert back into liquid form releasing the latent heat of vaporisation.
A fallout is that this water, named condensate, that is frequently acidic, needs to be piped outside to a waste pipe or soakaway. The boiler is required to be fixed to a wall and the output gases will go through the flue. Hot water is initialy served by a small recepticle tank to enable speedy hot water .
What size of Boiler do I need?
You should bear in mind that many years ago central heating engineers often put in boilers that had a higher output than purely necessary.. Although this ensured that there was never the chance of the boiler not meeting the heat demand, even in the coldest winters, it also meant that they were primarily working at a part load, and so running under their planned optimum efficiency. If you have fitted extra loft or cavity wall insulating material since the last boiler was fitted, it could well be that you will be urged to install a smaller boiler than the current one.
Before you find a freshly boiler we recommend you get advice from a CORGI registered fitter.
Do the radiators need to be outsized with a condensing boiler?
The main driver for lower fuel use from a condensing boiler is because it carries a bigger heat exchanger. More Prominent radiators would result in cooler return water temperatures, and so result in even better energy performance, but the further saving is not proven to be cost effective, as you should count the fact that that the system is is only using a small part of its overall capacity for the majority of the heating season. Whilst this assertion is correct householders would probably accept this in smaller properties.
The process we have talked about was contained in the reference document for the SEDBUK project, and evaluated whether there required to be new conditions for condensing boilers. The conclusion was that no new recommendations were demanded, and the test results for both types employ the same SEDBUK calculation.