When you live in a dry climate, having a humidifier in the house is essential to comfort. Yet even the best humidifiers come with two major challenges: cleaning and maintenance.
When it comes to maintaining an evaporative humidifier, changing and caring for the filter is a big piece of the puzzle. The filter or wick needs to be replaced every one to three months, says Honeywell, one of the biggest makers of humidifiers.
Honeywell divides its replacement filters into sizes based on letters. The size A filter fits the very popular HCM-350/HEV355, HCM-710 & HCM-315/HEV312 models.
One important tip: consider flipping the filter over every time you use it. This will extend the life.
What happens if you don’t change the filter? Well, all sorts of nasty stuff can grow in a humidifier . . . and filters/wicks also lose their effectiveness over time.
For the best original equipment maker (OEM) filter, we’d recommend Honeywell’s Replacement Wicking Filter A. Yes, an OEM filter is made by your humidifier’s manufacturer—and it is probably the best way to confirm compatibility.
What We Liked
• Works well.
• Lasts longer than generic versions. This filter is rated for use for 1-3 months. In independent tests we found in researching this article, we discovered that generic filters have a shorter life span—this depends on how dry your house is, how much the humidifier runs, etc.
• Kills 99.99% of mold, algae and bacterial growth.
• Treated with an antimicrobial layer (the blue part).
What Needs Work
• Pricey. Yes this pack is for a single filter—if the budget is tight, you may want to consider the generic filters we’ll review next.