Ken Kern - Percent Quotes

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A perfectly flat roof permits up to 50 percent more heat gain that a pitched roof... This illustrates the failure of the flat-roof construction to get natural, hot air flow out from under the eaves.

Ken Kern
If no attempt is made to control excessive heat loss through glass... a solar house may require as much as 20 percent more fuel than an orthodox house during December and January... Wendell Thomas recognized and solved this problem... by burying the house in the ground, except for the south and east window areas.... at night... windows are covered with from inside by insulation boards and drapes...

Ken Kern
As far back as 1624... Louis Savot invented the first heat-circulating fireplace. His unit was installed in the Louvre, Paris, and became the prototype for Ben Franklin's 1742 Pennsylvania stove. The 1624 French fireplace achieved 30 to 45 percent more efficiency than do most American tract home fireplaces of today! Savot surrounded the grate of his creation with a metal chamber, which had warm air outlets above the fire opening. He also supplied the fire with air from under the floor. Thus, room drafts were reduced and combustion efficiency was further improved. Few people are aware that practically all of the technical features of Franklin's Pennsylvania stove were copied from earlier inventors.

Ken Kern
Glass... is not required for the collection of solar heat. The National Physical Laboratory of Israel... has perfected a highly polished metal surface coated with a molecular-thin black layer of special paint, which absorbs more than 90 percent sunlight. The polished metal radiates very little of the heat it receives.... A south-facing wall fitted out with these plates would really "drink in" solar heat, windows, or no windows.

Ken Kern
A wind of only 15 mph may increase the heat loss from a window surface by 47 percent or from a concrete wall by 34 percent. Therefore, heating plans have a critical relationship with windbreaks and with wind baffles.

Ken Kern
As much as 70 percent of the sun's heat rays can be reflected from one's house by the installation of a white or light-colored roof.

Ken Kern