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Compare the costs • Compare to ionizers • Compare to HEPA filters • Allergies or Asthma? • How does C-90A work? • C-90A FAQ • Benefits of the C-90A


Replacement carbon filters for Friedrich C90A, C90B, C90, C95


The Friedrich C-90B
is no longer manufactured.
See P600XL
for superior substitute.

Begin Here - About Us
Compare the costs
Compare to ionizers
Compare to HEPA filters
Allergies or Asthma?
How does C-90B work?
Frequent Questions
Benefits of the C-90B
C-90B Brochure
More Information


C-90A Air Cleaner - 3

Frequently Asked Questions
  1. What is the difference between the Friedrich C-90B and the Friedrich C-90A?
  2. Is the C-90B effective against mold?
  3. Does the C-90B electronic air cleaner produce any ozone?
  4. How can I buy replacement carbon filters?
  5. How often should I replace the carbon filter?
  6. Do I need to replace my pre-filter?
  7. Where do I get filters for my C-90A, C-90B, or C90?
  8. Where can I download an Owner's Manual?
  9. What are the C-90B's dimensions?
  10. How quiet is the C-90B?
  11. Aren't the filters really expensive?
  12. How large an area will the C-90B handle?
  13. Will the C-90B discolor walls, drapes or furniture?
  14. How do I know which air cleaners are really effective?
  15. How much electricity does the C-90B require?
  16. How do I clean my C-90B?
  17. How do I install a carbon filter on my air cleaner?
  18. Can I use my C-90B with my window open?
  19. Why is my air cleaner making a popping sound?


Worldwide Supplier of Air Purifiers, Air Cleaners, Air Filters, Dust Collectors, & Mist Collectors shipping from North America. 
Many, but not all models are displayed.  Air Purifiers are available with a variety of electrical options to meet the power standards of most countries.

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