On Sun, 4 Mar 2012 03:06:26 +0100, Crispin Pemberton-Pigott wrote: > When you are in a room you want to heat, it is not as pleasant for the user > to have the hot gases rise to the top of the room and the cold remain on the > floor. If you use a radiant heater, the heat is directed outward near the > floor giving the impression it gives more heat because you feel warmer, > even though the total energy in the same.
Yes this is why I like wet underfloor heating, it's a fact that people feel more comfortable when their feet are warmer than their heads, so they feel more comfortable at a lower temperature if the heat is rising from the floor. Romans used it with flue gases directly, Ronal and I went to see the ruin of a bath house with a hypocaust in 2008. Lower temperature equates to lower energy use. Also there is also a self regulating effect in that with water near blood heat the temperature difference that drives the heat transfer is low, as the room heats up it gets lower and so less heat is transferred. It's most suitable for rooms in constant occupation. When we first imported pellet stoves from north america I was amazed that the fan outlet was at the top of the stove. I felt it should be directed in narrow slits at floor level, to take advantage of the way a fluid will cling to a surface (Coanda effect) and then rise. AJH _______________________________________________ Stoves mailing list to Send a Message to the list, use the email address [email protected] to UNSUBSCRIBE or Change your List Settings use the web page http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org for more Biomass Cooking Stoves, News and Information see our web site: http://www.bioenergylists.org/
