The HAC504 (3-Pack) Honeywell Humidifier Filter is vital to turning your humidifier's water into a soothing mist. This filter's surface is anitmicrobially treated to prevent unwanted growth of mold, algae, and bacteria. Pair with an antimicrobial cleaner from Protec and you'll be guarding your humidifier against growth of algae and bacteria as well. Order the HAC504 Honeywell Humidifier Filter 3-Pack today!

• Reinforced, antimicrobially-treated filter material for long filter life
• Air Washing pre-filter traps dust before it enters the filter
• Ready to soak and install right out of the box
• No shipping restrictions in USA