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Friedrich C-90B Air Cleaner by Friedrich
Product DetailsManufacturer: Friedrich Brand: Friedrich Edition: Kitchen Model: C-90B Publisher: Friedrich Studio: Friedrich Music Label: Friedrich Product features: - Power Requirements: 120 volts AC
- Power Consumption: 90 watts, 0.80 amps
- Fan Speed: 220 cfm, 280 cfm, 390 cfm
- Dust CADR: 384
- Tobacco Smoke CADR: 326
Tools and Hardware Reviews of Friedrich C-90B Air CleanerCustomer Review: Cleans great but poor quality control; the truth about "snapping" Summary: 2 Stars
We've bought 4 of these for use throughout our home ahd have had to return half of them (50%) due to quality control problems and "snapping". This is ridiculous for a product of this high rating and price. We've been seemingly through the trenches with these, dealt with dealers AND the factory and here's the result of our research.
Now, here's the deal re "snapping". There is appropriate snapping and inappropriate snapping/rubbing noises. Like bug zappers, large dust and dirt particules drawn into the cleaner are ionized and charged, sticking to the metal filter elements and may create a sharp electrical, bug-zapper type snapping noise. We've noticed that and can discern it. This is good and we have no problem with it.
The other snapping noise we've had is the fan blades hitting the inner plastic appliance/fan housing, especially when run on high. This is NOT good and we've had repeated problems. Our current crop of 90-B we can run the one in the basement on High and its quiet. The living room one we can only run on Med; on High in a short time we hear this rubbing/snapping-type noise. Both sit on level hard floors.
I let one of these run a while snapping/rubbing and upon examination of the inner plastic fan housing (you can look when you clean the filters) noticed black skuff marks where the fan blades (black plastic...that can flex on higher rpms?) rubbed the bottom of the housing. Taking coarse sandpaper I rubbed the scuff area repeatedly, over time eventually removing enough excess plastic, and the fan stopped the rubbing/snapping.
I called another high volume allergy product retailer in the area and asked if they had any problems, the clerk responded "You mean like parts rubbing? Uh...no. Never! Never had any problems". Well, the disingenuous answer and tone told me this was something they had heard before. I described the problems and types of noises to the Factory and they suspected the fan may have gotten misalligned, hence rubbing, in shipping to the distributor...told me to return it immediately. My retailer in Delaware had a good return policy, I kept all papers and documentation and conversations and actions on our part, worked with us and we were eventually able to weed through poorly performing units and do Frederich's QC research for them.
In summary, an incredible air cleaner when it works like its supposed to that I'd love to rate high but recommend to purchase only after reviewing your vendor's return policy (definately NOT mail order!!!) ...and don't modify the unit like we did to fix the problem as it will likely void any warranty. BTW, we've also not noticed any odor problems or anything else.
Description of Friedrich C-90B Air CleanerFriedrich'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.
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