Product review (5 stars): Replacement Filter for HM1746
I've had no problems with these. I'm glad they still make them. My machine is 4-5 years old (at least) and this is the first time I've needed to change the filter. It says to change it every couple months, but I only use this about 2-3 months out of the year. The "FilterCheck" reading on the machine was still reading that the filter was good, but I decided to change it, because it was starting too fall apart, after so many years.

I think it's better to pay the extra few bucks, and get this filter, instead of getting the China knock-offs.

I'm using the HM1746 machine. It's a really old model, but the filter still works. I just use this in a small bedroom, which has the door shut most of the time, and it's really helpful. My mouth starts getting really dry and night, from the heater, and my cat also has problems breathing. So I know when it's time to pull this thing out of the storage. After a few hours, it really makes a difference. I no longer feel like my mouth is drying out, and I can also take my cat off of her allergy medication.

It also leaves a fresh, smooth feeling in the air. I use this humidifier next to my air cleaner.