Friedrich Pre-Filter for C-90B Air Purifier Review

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(More customer reviews)There are two types of filtering systems; whole house hookups which are installed professionally or self-installed, and individual room units. Consumer Reports says "The most effective type of air cleaner is a professionally installed whole-house system; but it's also expensive and feasible only in houses with forced-air heating or cooling. Simple replacement furnace filters are inexpensive and easy to maintain, but generally better suited to clearing large particles from the air. Room air cleaners are your only option if you don't have a forced-air system."
Of the room units, there are two basic technologies HEPA (high-efficiency particulate air)filters, in which a fan draws air through a paper or fine-mesh filter, and electrostatic precipitators which draw air through an electrical field. Charged particles are then trapped on oppositely charged collector plates.
All precipitators generate small amounts of ozone, which has an odor that may be objectionable. They may also make a crackling sound as they accumulate dirt.
The best precipitators use a fan. I know everybody loves the The Sharper Image and the Hoover one but they have no fan; the Honeywell Environizer has a weak one. The Friedrich C-90 has a fan.
ConsumerReports.org rated this one ten times better over the Sharper Image ones, which are basically over rated and you're paying for the marketing and packaging. The Friedrich C-90 topped all of Consumer Reports tests on filters hands down.
It's not as sleek as the Ionic Breezes, but it gets the job done, and keeps your home as clean as any machine on the market will.

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Award winning air purifier which never needs costly HEPA filter replacements. Excellent at particle and smoke removal, this unit filters your air at the lowest possible cost. The C-90B is an improvement on the older C-90A model - providing coverage of a larger area and improved clean air delivery rates (CADR).Prefilter and carbon filter included. Effectively covers over 500 square feet.

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