Boneco A250 Aqua Pro Water Filter

By: Boneco AIR-O-SWISS


Manufacturer Part # A250 Our Item # IA4512

Direct replacement for the discontinued A7531 Demineralization Cartridge.

2-in-1 Water Filter for BONECO & AIR-O-SWISS Ultrasonic Humidifiers.

The Aqua Pro 2-in-1 Water Filter not only significantly reduces water hardness, but also acts as a water purifier to filter out harmful substances such as copper, lead, mercury as well as unpleasant odors from your water.

Fits Models
Boneco AIR-O-SWISS Ultrasonic Humidifiers: 
7131 (AOS 7131), 7133 (AOS 7133), 7135 (AOS 7135), 7142 (AOS U7142), 7144 (AOS 7144), 7145 (AOS 7145), 7147 (AOS 7147), U200 (AOS U200), U300, U330, U350, U600 (AOS U600), U650 (AOS U650), U700 (AOS U700).


  • Water Demineralization: Significantly reduces water hardness and the minerals that can cause "white dust"
  • Water Purification: Active Carbon in the filter absorbs impurities and removes odor from the water
  • Extremely economic - lasts up to 6 months (filter life varies with your water quality)
  • Includes a free water test strip to measure the expected lifetime of your filter
  • Fits directly on to universal Boneco / AIR-O-SWISS Ultrasonic Humidifier Tank Cap
  • Direct replacement for the A7531 Demineralization Cartridge


  • Dimensions: 3.25" W x 3.25" D x 4.75" H
  • Weight: 0.60 lbs

What's Included:

  • A250 Aqua Pro 2-in-1 Water Filter
  • Free Water Test Strip

Unscrew and dispose of the used demineralization cartridge or Aqua Pro 2-in-1 Water Filter from the inside of the water tank cap. Do not dispose of the water tank cap. Before initial use, run tap water through the opening in the new Aqua Pro 2-in-1 Water Filter for 2 minutes. Screw the new Aqua Pro 2-in-1 Water Filter onto the water tank cap.

When to Replace?

The A250 Aqua Pro can last between 2 to 6 months, however the lifetime of the filter depends on the quality of your water supply. A free water quality test strip is included with the filter so you will have a better understanding of how long the filter will last based on your local water hardness.