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vents in interior walls
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Andrew Gabriel
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vents in interior walls
In article .com,
writes:
Actually that's a point. Do chimneys let out huge amounts of heat too?
If you mean when they aren't being used to vent fumes, then yes.
When doing heatloss calculations for a room, an unused but still
open fireplace wastes around 1kW of heat which goes up the chimney.
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