Hey, I like that about the wing-back armchairs. I never knew that and it is pretty interesting that such an approach would be taken. Rather than address the source, address the comfort. :o] ----- Original Message ----- From: "Howard Winter" To: "Microcontroller discussion list - Public." Sent: Tuesday, May 22, 2007 10:48 PM Subject: Re: [EE]:: Why are radiators usually installed below windows. > Russell, > > On Wed, 23 May 2007 02:32:20 +1200, Russell McMahon wrote: > >> 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. > > Quite! This goes back way beyond when people started worrying about > efficiency, and were primaruly concerned with comfort - windows > (especially > if they aren't double-glazed) have vast heat-conduction compared to walls, > so on a cold day the air inside the window cools down dramatically, > causing a cold draft to flow across the room from the window. By warming > up this air you reduce the draft, so it feels much warmer than would be > the case if the radiator is elsewhere. Anyone who hasn't lived in a > drafty house probably underestimates this sort of thing :-) That's why > wing-back > armchairs were developed, to shield the sitter from the draft flowing > towards the open fire and up the chimney. > > Cheers, > > > Howard Winter > St.Albans, England > > > -- > http://www.piclist.com PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist