Particulates in Domestic Premises

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Abstract
Air particulates were surveyed in a home with central ventilation and an electrostatic filter in the main air duct with the returning air sampled. The average counts, in the 0.3μ 0.5μ, and 1.0μ ranges, were related to the normal activities, children playing, house cleaning, and smoking, with the following observations: Counts in all ranges under minimal activity were significantly different when the filter was on compared to when the filter was off. Cleaning and dusting in the home overwhelmed the filter. Smoking one cigar in the home raised particle counts from 10 to 100 times. These particle counts stayed up for at least three hours when the filter was off. The counts returned towards base line levels in one to two hours with the filter on.