Customer Reviews
Average Customer Review
(3 customer reviews) 
Works well,
March 14, 2012 Andrew Furst (Illinois, USA) - See all my reviews
Amazon Verified Purchase(What's this?)
This review is from: Whirlpool 8171433K Air Purifier Carbon Pre-Filters, Small, 4-Pack (Tools & Home Improvement)
These filters fit the small Whirlpool air filtration units (AP150, AP250). I've been running an AP150 near my bed for many years, and I've had noticeably fewer allergy problems as a result. Replacing this filter every 3 months, and the HEPA filter every year, this keeps working, does the job. Amazon has a great price on these (at the time of this review anyway, for $22 & change per 4-pack).
Pre-Filters are part of the technology,
July 1, 2011 D. Dycus (De Soto, TX USA) - See all my reviews
Amazon Verified Purchase(What's this?)
This review is from: Whirlpool 8171433K Air Purifier Carbon Pre-Filters, Small, 4-Pack (Tools & Home Improvement)
The air purifier needs a prefilter and a regular filter. I know the prefilter works because I can see the dust it collects. My purifier runs constantly next to the litter boxes but it takes about 3 months to become completely covered. Mfr recommends changing every 3 months so that works out perfectly.
0 of 6 people found the following review helpful
Doubt its a real carbon filter.,
October 5, 2011 DC (Schaumburg, il.) - See all my reviews
Amazon Verified Purchase(What's this?)
This review is from: Whirlpool 8171433K Air Purifier Carbon Pre-Filters, Small, 4-Pack (Tools & Home Improvement)
Its advertised as a carbon filter. Carbon filters are suppose to filter out gases like cigarette smoke. Who knows if it really works? They're about a 1/4 inch thick but are they really made of carbon particles? Do they really filter out gases such as cigarette smoke? I doubt it. The HEPA filters probably work but the carbon is more come on than anything.
