Heat load

www.heatload.com has some interesting words to help understand our climate range. Basisc calculations for DIY furnace and air conditioning installations as well as small diameter ducting for older homes can be located here.

Cold is another word for empty. It isn't really anything. It is, as a vacuum is, the lack of something. Cold is the lack of heat. The earth we live on is almost empty. We live on the edge of a delicate temperature balance only some 500° F above empty. The coldest it can ever get is about -460° F, but "hot-wise" temperatures can reach into the billions. We live at the bottom of a thermometer that stretches to the moon. Our planet is a cool puddle in a desert of heat, but water works only at these narrow temperature ranges, and life depends on this water.

Our planet must remain empty in order to support life. Refrigerants that leak into the atmosphere cause damage which allows extra heat to alter and fill our emptiness. Federal and international regulations have been devised and enacted to curb the release of certain refrigerants into the atmosphere to prevent our emptiness from being disrupted. A federal licence is required for handling these refrigerants. If your going to use refrigerants, use them conscientiously. Much depends on it.