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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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Air brick heat exchanger
A non-sealed-flue[1] gas boiler means there needs to ventilation in the room,
which is provided by air brick(s) (on the opposite wall to the gas voiler). This tends to produce a howling gale of cold air in winter, especially when the wind is blowing against the wall. Is there any kind of heat exchanger that would attempt to recover some of this heat without impeding air flow too much? I'm guessing it wouldn't work without forced airflow (which is possible, but complicates matters)? Or is there some kind of passive (eg convection) solution? What sort of airflow is required for safe combustion in the average gas boiler? Thanks Theo [1] I don't know the exact term, but it's the type of gas appliance which operates like an open fire, in that the oxygen comes from the room, rather than outside, but the combustion gases go up the flue. |
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