The Effect of Vacuum Cleaning
Table represents the number of dust particles less than 0.5 micron present in 1m3 of room air. This research was carried out by Ilmari Lindgren, M.D by the Helsinki University of Allergy Hospital in Finland.
General Medical Practitionists agreed that dust particles less than 0.5 micron are more harmful than the larger dust particles. Normal vacuum cleaners increase the amount of harmful dust particles in the room air. After 1 month with Puzer central vacuum cleaning system the room air was fresh, clean and healthy.
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