On Thu, 10 Jan 2008 07:34:01 -0800 (PST) someone who may be "Man at
B&Q" wrote this:-

Where do you think the air warmed by a heater ends up?

You are assuming all heating is by convection.


--
David Hansen, Edinburgh
I will *always* explain revoked encryption keys, unless RIP prevents me
http://www.opsi.gov.uk/acts/acts2000/00023--e.htm#54