Domestic Condensing boilers, the facts

A condensing boiler is a high efficiency advanced boiler that contains an additional heat exchanger in order that the red-hot waste air transfer much of their energy to pre warm the cold water input. Once processing at peak efficiency, the water steam developed in the burning process turns revert back into a liquid freeing the latent heat of vaporisation.

A fallout results in this liquid, called condensate, that is frequently acidic, should be piped outside to a waste pipe or soak away. The boiler should be fixed on a wall and the waste gases will travel through the flue. Hot water is delivered by a small-scale storage tank to facilitate convenient and rapid hot water accessibility.

How can I get the right size of boiler?

In earlier days boiler installers filled larger boilers than were called for. Whilst this ensured that there was little probability of the boiler failing to meet the need for heat, even in the coldest winters, it also meant that they were not running a full output, and so functioning in an ineffective style. If you have insulated your household since the previous boiler was installed, it could well be that you will be able to fit a lower-ranking capacity boiler than the current one.

We recommend seeking professional advice from a CORGI recorded installer before choosing a suitable replacement boiler.

Do I need to put in oversize radiators with condensing boilers??

The main driver for lower fuel consumption from a condensing boiler is that it has an oversize heat exchanger. More Prominent radiators would result in cooler return water temperatures, and so promote efficiency higher still, but the additional savings suffer from decreasing returns, as you need to remember that that the system is substantially under-loaded for the main heating calendar months. Whilst this assertion is correct homeowners would plausibly accept this in smaller properties.

These consequences were studied during the SEDBUK project, and evaluated whether there needed to be new considerations for condensing boilers. The recommendation was that no new recommendations were necessitated, and the test results for both cases share the same SEDBUK computation.