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The Diffuser Filter for the Eson 2 Nasal CPAP Mask is a replacement component that sits on top of the mask elbow and disperses exhaled air for quieter, less disruptive therapy. The clear plastic cap houses an eco-friendly fibrous fabric filter that breaks up the exhaled airflow stream, reducing noise and minimizing the draft that can disturb your bed partner.
Over time, the filter fabric can become discolored or damaged, reducing its effectiveness at diffusing air and managing sound. A fresh diffuser filter restores quiet exhale performance and maintains the clean airflow feel your Eson 2 was designed to deliver. The cap attaches to the top of the Eson 2 mask elbow and snaps into place for quick, tool-free replacement.
Note: This is the diffuser filter cap only. The Eson 2 mask frame, cushion, headgear, and elbow are sold separately.
Quiet Exhale Diffusion — The fibrous filter breaks up exhaled air into a gentle, dispersed flow, reducing noise and draft from the mask elbow.
Eco-Friendly Filter Material — Made from sustainable fibrous fabric that effectively diffuses air while being environmentally conscious.
Snap-On Installation — The clear plastic cap attaches to the top of the Eson 2 mask elbow for quick, tool-free replacement.
Washable & Reusable — The diffuser can be washed weekly to extend its useful life before replacement is needed.
Visual Wear Indicator — Discoloration of the filter fabric is a clear signal that it’s time for a fresh replacement.
| Specification | Details |
|---|---|
| Manufacturer | Fisher & Paykel Healthcare |
| Product Type | Replacement Diffuser Filter |
| Part Number | 400ESN261 |
| Filter Material | Eco-friendly fibrous fabric |
| Cap Material | Clear plastic |
| Compatible Mask | Eson 2 Nasal CPAP Mask |
| Tax Category | CPAP Replacement Supplies |
| Billing Code | E1399 (Misc. Product) |
Compatible with:
Not compatible with:
Placement: The diffuser filter cap attaches to the top of the Eson 2 mask elbow. It is a one-size component with no size variations.
Weekly Cleaning: Wash the diffuser filter in warm water with mild soap. Do not soak for more than 10 minutes. Rinse with fresh water until all soap residue is removed. Air dry away from direct sunlight.
When to Replace:
Do Not:
The fibrous filter disperses exhaled air into a gentle stream rather than a focused jet. Less noise from the exhalation port means fewer disturbances for you and your bed partner throughout the night.
Users consistently report noticing a difference in air quality and sound when they swap in a fresh diffuser. If yours looks discolored or you can smell a difference, it’s time for a new one.
At under $20, the diffuser filter is one of the most affordable ways to keep your Eson 2 performing at its best. Snap it on, enjoy quieter therapy, and replace when you see visible wear.
The Fisher & Paykel Eson 2 Nasal CPAP Mask only. It is not compatible with the original Eson or any other mask.
Yes. The diffuser filter is a one-size component. There are no size variations.
Replace when the filter fabric becomes discolored, damaged, or loose, or when the plastic cap cracks. Many users replace monthly, especially during cold and flu season.
Wash weekly in warm water with mild soap. Do not soak longer than 10 minutes. Rinse thoroughly and air dry away from direct sunlight.
It snaps onto the top of the Eson 2 mask elbow. The clear plastic cap connects at the exhalation port.
No. This is the diffuser filter cap only. The mask elbow, frame, cushion, and headgear are sold separately.
It disperses exhaled air through a fibrous filter, reducing the noise and focused draft that would otherwise exit the mask elbow. This makes therapy quieter for you and your bed partner.
Yes. The diffuser can be washed weekly to extend its life. However, once it becomes visibly discolored or damaged, washing won’t restore full performance and it should be replaced.
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