Mondo Knows Facts

Radiators sit under windows to block cold draughts

Rising warm air meets the downdraught from the glass and warms it Cold glass chills the air next to it, which sinks to the floor as a draught. Placing the radiator below the window sends a curtain of warm air up the pane to mix with that falling air before it reaches the room. The same layout also frees wall space and shortens the pipe run in older houses. It sits in Mondo's everyday life collection, one of 200 facts that each trace back to the reference below.

Where this comes from

Encyclopaedia Britannica

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Tags: heating, homes, design

Radiators sit under windows to block cold draughts: the short answers

Where does this come from, and can I check it?
Rising warm air meets the downdraught from the glass and warms it. The figure is taken from Encyclopaedia Britannica, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a everyday life fact?
Yes. It sits on the Everyday Life shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?
The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.