Peter,
You forget that the major problems with windows is loss by radiation and its low surface temperatures. The major effect of introducing a layer is the rise of surface temperature. Look at http://energysavingnow.com/ for explanations on how it works. If I explain it in email, it would be too long and inefficient for me. Hakan At 01:08 AM 12/17/2004, you wrote:
Hi Wendy and Eric ; Yes absolutely. Windows create heat loss by two methods, conduction and convection. Conduction means that heat is conducted through the pane of glass and lost. Convection means that windows are not completely sealed so heated air goes out and cold air comes in. Plastic sheets reduce convection losses by reducing window leaks. They create a layer of still air next to the glass which acts as an insulator and so reduce conduction losses. The amount of benefit will depend on the existing window construction (well sealed or not and double/triple glass or not). For best results the plastic sheet should be completely sealed around the entire circumference of the window. The thickness of the plastic is not a factor at all. Even very thin plastic will work. Best Regards, Peter G, Thailand --- Eric & Wendy <[EMAIL PROTECTED]> wrote: > Do you think putting plastic over the windows in > ones home helps to keep the > heat in during the winter? > > Wendy Adams > Harrisburg, PA
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