Product review (3 stars): Buyer beware
Honeywell humidifier is one of very few devices that can pump several gallons of water into the air to humidify the whole house.  9 gallons a day is what Honeywell advertises.  It does its job but at a price that Honeywell does not advertise.

What the manufacture does not warn you about is that HC-14 filter lasts 2 months (at least in Northern Virginia) .  By the end of the second month one can pump maybe 2 gallons a day.  I never had a filter that lasted 3 months (and, yes, I perform the prescribed maintenance).

Thus, if you want to use Honeywell QuietCare humidifier be prepared to shell out around $10-15 per months on replacement filters and ProTech cartridges.