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Friedrich C-90B Electrostatic Air Purifier | 
 enlarge | Brand: Friedrich
Buy New: $442.89
Rating:  22 reviews
MPN: C-90B
Model: C90B
ASIN: B000GZ4FLO
Availability: Usually ships in 3-4 business days
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| Features:
| • | Effectively covers a room up to 506 square feet. | | • | Excellent for allergy and asthma sufferers. | | • | Using electrostatic plates this unit cleans your air without costly filter replacements. | | • | Excellent at pollen, dust, pet dander, mold spore, smoke, and odor removal. | | • | Award-winning. |
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| Similar Items:
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| Editorial Reviews:
Product Description
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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| Customer Reviews: Read 5 more reviews...
Reliable September 19, 2008
Peter J. Collins (New York)
This is my second unit, the first lasted 7 years. The unit runs 24/7 and I clean the filters twice a month. Its a little loud on high and you occasionally hear pops, but it works. You would be surprised as to the amount of black soot that is washed out. I would recommend it highly.
 BEWARE OF HORRIFIC MESS!!! March 3, 2008
V. Bramlett (Portland, Or. United States)
2 out of 5 found this review helpful
I am a very careful shopper, and meticulously care for my property. This air cleaner was purchased on the recommendation of Consumer Reports.
The air cleaner would work well for awhile, but then I would notice BLACK FLECKS all over the walls, ceiling, windows, throughout the air cleaner ...... everywhere throughout the room!!!!!
This mess is caused by the replaceable "carbon filter" at the back of the air cleaner, and the mess DOES NOT clean up with soap and water - a heavy cleaning agent is required!!!!!
After the 4th mess throughout the family room, and numerous replacements of the "carbon filter" (one $24.00 filter lasting a whole 2 weeks before it spewed all over the walls and the air cleaner itself), I ordered a "pre-cleaning filter" to replace the "carbon filter", but the air cleaner no longer turned on. I believe too much BLACK GUNK from the carbon filter had ruined the air cleaner - and there is no way to take the air cleaner apart to clean the inside.
I made contact with the company for help with the problem. They merely guessed at what might have happened and offered no solutions.
After only 2 years this $500.00 air cleaner (not including the numerous replaceable "carbon filters") now rests in a land fill!!!
 5 stars for the product, 1 star for the manual September 24, 2007
Trevor Goodchild (The City of Angels)
10 out of 10 found this review helpful
I have owned this guy since it came out and am very happy with the product, but the manual could use some improvement.
Used properly you'll get years of trouble free, cheap and clean air. The chief concern with a unit of this type is ozone production. Ozone is *bad* for you. This unit is *the* best rated unit for ozone production and its ozone levels are very safe -- *IF* the unit is properly serviced.
What the manual doesn't tell you -- if you smell ozone you need to clean the element. You will need to clean the element a lot. If you cant/won't do that, this is not the air cleaner you are looking for.
The second problem with the manual is the cleaning directions are frankly harmful. The manual says to use dish detergent. The dish detergent will react with the aluminum and over a long enough time line turning the element black. This deposit will act like a dielectric (just like the dirt the element collects naturally) and the thing will spew out ozone. Once this had happened I could not get the element clean again and had to replace it.
I suggest you clean the element in your dishwasher, with *no* soap and no jet dry. Fill the soap bucket with pure white vinegar and do a light wash. It will come out sparkling clean and so far mine has not changed colors -- sometimes simple is better. Vinegar is a natural aluminum cleaner. Do *NOT* add cream of tartar or baking soda (this is a common aluminum cleaning recipe) -- this will get baked on to the element and it will *never* come off. Ask me how I found out? :-)
Lastly, the element is a very standard Honeywell element. You can purchase one for around $125 from online HVAC sites should yours become soiled or damaged (the part # is stamped on the side of the element).
Awesome Air Purifier July 16, 2007
Mojo Risin (Columbus, Ohio)
1 out of 1 found this review helpful
This is a wonderful air purifier. I did my research before buying and pulled the trigger about 2 months ago. I am so glad I did. I no longer have the allergy issues that I had in years past. My main focus was clean air without the costly filter replacements. That is what you get with the C-90B. I placed mine in the bedroom and run it whenever I sleep. I just cannot begin to tell you how much it has improved my life. I sleep better and my waking hours are better as well. I would highly recommend this product to anyone as I am very pleased. Thank you Friedrich for making such a great product!
Might want to cut larger filters July 10, 2007
M. L. Morgan (western Kentucky)
2 out of 2 found this review helpful
Air cleaner works fine, but filters that came with machine are a little small. It is easy to cut furnace filters to fit the cases. I live with 4 dogs, and they shed dust elephants worth of hair daily, so cleaners are put to hard use.
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