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Heating, Lighting, and Refrigeration: Prevent

To Prevent Dust.-Dust may find its way either from above or from below into the stream of warm air that rises from the register. To prevent its rise from below, the outer opening of the cold-air box may be screened with cheese cloth or other thin fabric, and over the seams of the cold-air box and flues may be placed a metal protector with tightly soldered joints. Thus the gases and any foul air that may be in the cellar will be excluded from the draught, and the supply of air coming in from out of doors will be fresh and pure as well as warm. To prevent dust from entering the flue from above, the registers should be closed while sweeping and should be removed each day after sweeping and dusted out of the window; one or more thicknesses of cheese cloth or netting should be stretched under the register and across the flue so as to screen the current of air as it rises.