Half a croissant, on a plate, with a sign in front of it saying '50c'
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Temperature controlled furniture

A heat exchanger in your furniture keeps you cool or warm as needed
 
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Tibetan monks used to carry small charcoal braziers under their robes to keep themselves warm in the winter.

It is silly to heat or cool a whole building when all you really care about the temperature in your immediate vicinity.

Since we do most indoor activities on one piece of furniture or another why not just control the temperature of the furniture with an air heat exchanger that blows hot or cold air through the side of the furniture that we touch. A peltier junction (solid state cooler) and blower heats or cools the incoming air and vents the waste heat/cold away from the furniture.

The furniture could have a pressure switch to shut itself off when you were not using it.

macrumpton, May 31 2004

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       I need a heated mouse and a keyboard that blows warm air in my face. Would allow me to hack along at 50F instead of 70F. I already have a heating pad under my feet in winter.
kbecker, Jun 01 2004
  

       The improvements in my scheme would be that liquid is not involved, so condensation, leaks and punctures are not a problem and you dont need to run the garden hose into the furniture or deal with 500lb chairs..   

       Using air as the heat transfer medium also creates a warm or cool breeze that surrounds you rather than just cooling or warming the part of you that is in contact with the furniture.   

       Using a peltier junction lets you choose heating or cooling and the degree you want of it.
macrumpton, Jun 01 2004
  

       I did not mean to imply that the peltier junction could magically dissapate heat.   

       Re the heatsinks, a smaller heatsink works fine if you move sufficient volumes of air past to carry away the heat/cold.   

       My scheme calls for fans to move a large volume of air on both the hot and cold sides to distribute the desired temp air and dissapate the waste temp air. A peltier device will quickly cook itself to death without something sucking the heat away, so it makes sense to use both sides. You might be able to make it so the wast heat/cold keeps your coffee/cola hot/cold   

       Also many people dislike the idea of being under the emf that electric blankets give off
macrumpton, Jun 02 2004
  
      
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