Product Description
friedrich's C-90B electronic air purifier uses the same technology generally used in whole-house and commercial installations. This friedrich Air Purifier is ideal for allergy sufferers because it is very effective in removing pollen, dust, mold spores, and other particulates from the airflow that trigger allergy symptoms. This filterless unit supports a thin carbon mat to absorb odors. This electronic unit works with two sets of plates. One set of plates charges the airflow and another collects any particles that were charged by the first set. This makes it a true electrostatic system. Since there is relatively little constriction of the airflow, the units tend to be quiet, producing only a quality white noise due to the operation of the fan.
Read more Friedrich C-90B Electronic Air Purifier
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.
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!!!
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).
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!
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.
I recently purchased one of these after extensive research. Since we have a two story home, I find myself moving it back and forth. The only downside is the size. It's about the size of a medium dog carrier. But the fact that it is so quiet and works so well, make it worth it. My husband and I both smoke and our house smells fresh and clean for the first time in several years. His mother, a non-smoker, is even amazed. Next year I will definately be buying another one. You don't even know it's running on low and when I turn it up, it's still fairly quiet and non-distracting.
This is the best Air Cleaner on the market,period. I have had mine for 11 years and I am ordering a new one as soon as I finish this review. It is worth every penny and then some. It really works, I guarantee it. Don't listen to the negative reviews.
I bought this air purifier because of the good reviews. Within the first week I had to contact customer service because it because it rattled and made snapping noises. Customer service was very nice, and they arranged to have a new one sent out.
I got the new one, and although it didn't rattle, it continued to make a "snapping" sound. When I called about this, I was told that it would eventually stop, and it was only because the product was still new. (And by the way, I am very careful about following all the instructions regarding the cleaning and care of the unit.)
Well, it's been over 6 months and it hasn't stopped. My husband is furious that I got rid of the old purifier, because this one wakes us up at least 3 times a week at night with that "snapping" sound.
I just got off the phone with their customer service today to complain again, and I was *now* just told that the popping sound just means the unit is working - and that it will never stop! I would never have bought this product if I knew that.
I will grant you that it cleans the air well, very well - but who wants to put up with the sound of a whip cracking every other night? It's unbearable, and unless something like this wouldn't bother you, I would pass on the product.
Update: I just got an email from Friedrich which said the following:
"From everything you have written it sounds as if your unit is operating as designed. If you feel that there is something wrong with the unit, you can certainly send it to the nearest Service Center as listed on page 9 of your Operator's Guide.However, if they find nothing wrong with the unit you would be liable for all service charges."
Buyer beware....
In comparison to many air filters which use disposable (and expensive) HEPA filter units, this Friedrich uses an electrostatic filter element to collect and trap dust particles. This is far superior to the electrostatic filters sold by Sharper Image because the total surface area for collecting dust is MUCH greater. The Friedrich C-90 (A or B) has an internal fan that draws air through a pre-filter, then through an aluminum element with many electrostatically-charged plates that capture dust particles, and finally through a carbon filter for cleaning up odors. Filtration has 3 stages: 1)an outer filter to catch hair and large dust particles, etc. 2) the main inner filter element and 3) a final charcoal filter. Each are removable to clean. The main filter element can be cleaned in a dishwasher; the pre- and carbon filters can be cleaned with a vacuum cleaner brush. I've never bothered replacing the carbon filter - but have no strong odors in the apartment. I've never noticed any "ozone" smell noted by other reviewers. Friederich after-sales support is terrific.
NET: The unit is well-built, American-made, solid, but fairly large (like a small college-dorm refridgerator). The fan has 3 speeds. I have no problem with the noise level, (a low hum from the internal fan even at the lowest setting) but it bothers my wife. Prices vary widely; I've owned mine for 5+ years and would consider buying another/the same unit again.
ONE CAVEAT: the plates on the main electrostatic filter element are extremely fragile, and easily bent. Once bent out of alignment, the unit will continually pop and crackle as sparks jump between the unaligned plates. A replacement filter element is costly, but not when one considers the first one lasted over 5 years.
Here some background. I used to use the Ionic Breeze aircleaner to clean the air against my allergies. The Ionic Breeze is not a good aircleaner as it has no fan to drive the air. I had it next to my face, literally, at night to feel an effect. I was not all too offended by the ozone smell until CR came up with its warning against the device and I threw it in the trash. I bought the Friedrich with the highest expectation but I am somewhat disapointed. I run it at night in my bedroom. I am not sure the cleaning power exceeds conventional HEPA filters (myallergies tell me "no"). People in other reviews point out the macroscopic dust that they see. This is what every air cleaner does terrific well (the ones with a fan at least). It's hard to judge the microscopic cleaning power. Let alone I am very disappointed about the ozone emission. I am a physicist. I am not paranoid but the smell from the ozone emission is at least as bad as the Ionic Breeze. Someone above called it wet dog smell. I just don't believe that with the low emission as stated in CR it would smell that bad. Maybe CR tested a particular good model, don't know. For my part I have a 500 $ failed health investment for the garage...
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