Honeywell F50F manual How Electronic Air Cleaning Works, A word about, particle size, Postage

HOW ELECTRONIC AIR CLEANING WORKS

A word about	The particles removed by the electronic air
particle size	cleaner tend to be very small—less than 10
	microns. But what is a 10 micron particle? The
	eye of an average size sewing needle is about
	750 microns across, and the dot in the i in the
	word micron is about 400 microns. Generally,
	particles smaller than 10 microns can be seen
	only with a microscope, except in very large
	concentrations, such as a puff of smoke. Your
	electronic air cleaner can remove even smaller
	particles that can be seen only with an electron
	microscope.
	Although particles 1 micron and smaller make
	up only about 20 percent of the total weight of
	particles in unfiltered air, they account for over
	99 percent of the numbers of particles.
	Because they are so tiny, these particles tend to
	remain suspended in the air unless they collide
	with a solid surface. Then they attach by
	molecular adhesion and stick like glue, staining
	walls and furniture and coating your air condi-
	tioning coils. And of course, some of these
	particles can cause allergic reactions or simply
	make the environment less pleasant.
	749
		25,400
		Postage
	i	397
		M 6031

13 69-0756B—2