webmaster
Joined: 18 May 1999
Posts: 123
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 Posted: Tue Feb 25, 2003 4:03 pm Post subject: |
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This can get technical but the boiler will condense when the water returning from the radiators (or underfloor) and flowing through the heat exchanger is cool enough to make the vapour in the flue gases condense; and then release the latent heat. (This happens when the gases are cooled to around 54oC.) This recovered heat pre-heats the water before it gets to the main part of the burner. Condensing boilers have a larger heat exchanger than conventional boilers - they are therefore always more efficient than standard boilers even when not condensing. Radiators can be over-sized to make the boiler condense more often, however this is not generally cost effective and they should be sized as for a conventional boiler.
Regards, Webmaster
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Regards, Webmaster |
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