Review of Honeywell Humidifier Wick Filter, Single, HAC-504AW

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I don't even know why they still make the non-airwashing filters. These Honeywell HAC-504 Replacement Filter for Honeywell Humidifiers really do take a lot of the dust out the air, but more importantly these filters holdup a lot longer than the HONEYWELL/ENVIRACAIRE HAC-504 Replacement Filter Pad ones do, and they really aren't that much more expensive. These filters are mislisted though, their real part number is HAC-504AW, the "AW" is for "Air Washing", because for the blue layer of filter material.

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For years I have been delighted with these replacement filters for my Honeywell humidifier. Unfortunately the manufacturer has recently made a product change that I find very disappointing, the filter's thickness has been reduced in half while keeping the price unchanged. This of course then cuts in half the amount of wet area exposed to the air stream making the humidier less effective!

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We run two humidifiers all year round here--it's dry in the desert--and these filters are MUCH better than the reg ones. It's worth a little more to get these. That blue stuff on the outside helps them last longer and filter the air better.

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This filter appears to be a genuine Honeywell filter but is much thinner and does a poor job of evaporating the water. The previous filter would empty a 1.5 gallon tank in 24 hrs. With this filter it is 1/2 full 24 hrs. later. See my video for direct comparison. I suspect the other 1 and 2 stars reviews do not realize this is a different filter. I searched the box and both say Honeywell HAC-504aw. It appears to be made by Honeywell. Honeywell go back to the old filter or I will get a different brand of humidifier.

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I am very disappointed in this replacement filter. I put it in my humidifier, noticing it was noticably thinnner but thinking it probably didn't matter. My humidifier put out significantly less moisture. I thought my humidifier was just getting old (which it was) and replaced it with a new one, HCM-630, which worked much better. (My new humidifier came with a MUCH thicker filter which I used.) I ended up buying another HCM-630 and put one of these replacement filters in it just to test it out. The new humidifier put out about HALF the moisture with the thinner replacement filter. I thought I had a humidifier problem, but i had a filter problem (expensive mistake!) Anyway, I think the manufacturer should say on the humidifier, "3 gallons of output a day WITH THE ORIGINAL FILTER ONLY" (you can't buy a "replacement" filter that's as thick as the original one... this HAC-504AW is the official replacement). I am going to be calling the manufacturer to complain.