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Interesting and that's more than i expected and a huge amount in potential for a boiler using a cubic metre an hour on average1.46l/cu m of methane is the condensate. Measure it and you'll know how much condensate there is, I have done it but you need to separate the flue from the hex.
Correct and that's a great point in the case where the boiler is hardly condensing at all during the cont running. At least you will get some time condensing. I wonder if the controls could take that into account!Three times an hour means a reduction in fuel saved over running cooler looking for the latent heat over an hour
That's not true, the aim isn't too keep the burner cool by dumping heat to outdoors, that would be truly perverse! Condensing boilers are specifically designed to keep the gas and air in similar proportion throughout the range and simply increasing the air is designed to cause more gas to be burnt. The coolness of the hex is caused by the heat being disappated by the radiators internally.Low modulation also means the boiler runs continuously but to achieve that greater quantities of excess air are use to keep the burner cool reducing flue temp and efficiency.
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