New Condensing boilers, the underlying truth

A condensing boiler is a efficient innovative boiler that contains an additional heat exchanger to enable the hot waste air transfer a large proportion of their energy to pre-heat the mains water to be heated. When processing at peak efficiency, the water steam created in the operating process condenses back into water liberating the latent heat of vaporisation.

A fallout is that this liquid, known as condensate, which is typically acidic, should be piped outside to a drain or water drain. The boiler should be fitted against a wall and the waste gases will go through the flue. Hot water is initially provided by a modest recepticle tank to enable rapid hot water accessibility.

What size of Boiler do I need?

You should keep in mind that many years ago central heating engineers often put in boilers that had a higher output than strictly necessary. Whilst this meant that there was no possibility of the boiler falling short on its demands, irregardless of the winter weather, it also meant that they were primarily running at a reduced capacity, and so running under their planned optimum efficiency. If you have insulated your property since the previous boiler was put in, it is highly likely that you will need a humbler boiler than the current one.

We certainly recommend you get advice from a CORGI installer before buying your next boiler

If I buy a condensing boiler should I install large radiators?

The main driver for lower fuel consumption from a condensing boiler is that it has an oversize heat exchanger. Bigger radiators would allow lower return temperatures, and so push efficiency higher still, but the extra benefit has not been viewed as cost effective, bearing in mind that the system is running at very low capacity for the main heating months. That probably remains true, though the reduced heating demand for new build may easily mean that householders would now endure over-sized radiators more willingly.

These events were debated during the SEDBUK project, and assessed whether there required to be new considerations for condensing boilers. The conclusion was that they need not, and the test results forall the boiler types share the same SEDBUK computation.

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