Just a musing (A plumber I aint) 

If the cold recalculating air from the window is falling it meets the hot
rising air from the radiator thus generating a circulating and stirring of
the air resulting in a slower moving warm air moving into the room from the
median point between glass and window........

Imagine the radiator on the opposing wall to the window this would be
draughty room as the cold air would fall from the window cut you off at the
ankles run across the room before being heated by the radiator causing the
warming of the air probably resulting in stratification of the still section
within the middle area of the room and a hot top section 

Regards Steve

-----Original Message-----
From: piclist-bounces@MIT.EDU [mailto:piclist-bounces@MIT.EDU] On Behalf Of
Russell McMahon
Sent: 22 May 2007 15:32
To: PIC List
Subject: [EE]:: Why are radiators usually installed below windows.

A friend asks:

Industry practice is to locate heating radiators (most often fed via a
reticulated hot water system) under windows.

Nobody can tell me why this is done and to my mind it would perhaps be 
the
worst place from an energy efficiency point of view although there may 
be
other reasons (like reducing convective draughts within the room  - 
which
can reduce the apparent temperature by several degrees) why it is a 
good
idea.

I would hence appreciate your commentary as to what you would expect 
to be
the optimum location for a radiator and why.

Any thoughts?



        Russell 

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