Product review (1 stars): Half thickness of original filter that came with HCM-315T.
This filter is half the thickness than the unit which came with my Honeywell QuietCare HCM-315T Humidifier.  Causing less water to be absorbed into the filter which requires the humidifier to work a lot harder.  Meaning it never reaches the attainable humidity set point the original filter and settings could reach.  I do NOT recommend the HAC-504 Filter which was linked from my purchase of the HCM-315T.

Discovered after installing this filter and reading reviews of it.  I should have searched for the HAC-504AW which is the same thickness of the original filter that came with my humidifier.  If I could return this filter I would as I feel duped.  But I have already installed it...

I went back to my prior order of the humidifier to make a selection on filters and this was highlighted as the proper part item.  Should have known better.  Felt mislead on the images utilized as it shows the blue outer wrapping like my original filter has.  This item does not have it and can see through the mesh very easily.

Now I have to pay more $$ to order the proper filter (HAC-504AW).