Home › Models › Boneco / Air-O-Swiss 7142
What filter does a Boneco / Air-O-Swiss 7142 take?
It takes the Boneco A250 Aqua Pro Demineralization Cartridge — OEM part number A250.
Boneco / Air-O-Swiss 7142, ultrasonic humidifier, tabletop.
Lowest verified price: none captured yet — see the notes below. The Amazon button below is the current buy route.
Buy the A250 on Amazon — A250Amazon search for the exact part number (no single listing is endorsed). Amazon price is shown on Amazon; we do not quote it here.
The part, in brief
| Part | Boneco A250 Aqua Pro Demineralization Cartridge |
|---|---|
| Replacement interval | Replace every 3–6 months depending on water hardness (Boneco). |
| Per change | Screws into the water tank cap of the listed Boneco/Air-O-Swiss ultrasonic models. |
| Equivalents | Boneco 7531 |
Verified prices
| Option | Price | Store & shipping |
|---|
No US-dollar price is listed: Boneco's global store lists the A250 at CHF 19.90 (Swiss francs — not converted here, because a converted figure would not be a real US price), and no US retailer price was verified on 2026-11-11. Check boneco.com's US store for current pricing.
Full record with every price, source and date: Boneco A250 Aqua Pro Demineralization Cartridge page.