NEW! CS ULTRA Filter – H13 HEPA + Carbon | 2 Filters + 2 Free Bonus Refills (VP)
*Eligible, ready-to-ship orders completed on business days. Prescription-required orders must be cleared before the cutoff.
Prescription-required products are identified before shipment. Need help? or text 480-625-8822.
Shipping & delivery +
Free U.S. shipping applies to orders over $99.99. Eligible, ready-to-ship orders completed before 3:00 PM Arizona time on business days generally ship the same day. Orders completed after the cutoff generally ship the next business day. Prescription-required orders must be cleared before the cutoff. Orders over $200 require a signature.
Returns +
Eligible products may be returned within 30 calendar days. Restocking fees and product-condition requirements apply. Opened masks cannot be returned for hygiene reasons.
Read full return policy →Warranty & condition +
Only brand-new 11th-generation CPAP and BiPAP machines include a 2-year SistemmaCPAP warranty. Used, open-box, and refurbished equipment, earlier-generation machines, and oxygen concentrators include a 90-day SistemmaCPAP warranty. A product may also have separate manufacturer warranty coverage if it is still in effect. Review the listing or contact us to confirm coverage for this item.
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Product details
Clear information before you order.
Limited-Time Offer: Get 2 Extra HEPA Filters—Free!(4 total)
Triple-Layer Filtration
5× the surface area for longer life and better filtration.
for ResMed AirSense / AirCurve 11 and 10
The CSpring ULTRA is a compact, high-performance filter engineered for the ResMed AirSense 11 system. Designed to upgrade air purity beyond the standard OEM filter, it features a three-stage filtration system:
- Carbon Pre-Filter (2 mm): Captures coarse dust, hair, and neutralizes odors and VOCs.
- H13 HEPA Filter Core: Traps ≥99.95% of particles ≥0.3 μm, including allergens, bacteria, and fine dust.
- Non-woven HEPA Composite Fiber Post-Filter: Ensures final-stage air purity before entering CPAP
What’s Included with the CS ULTRA
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1× CS ULTRA CPAP Filter adapter
- Includes 2 HEPA Filters – Plus 2 Bonus Filters (4 Total) During Intro Offer
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Specifications:
| Dimensions | 45 mm × 15 mm × 18 mm |
| Pleats |
|
| HEPA Surface Area | ~64.8 cm² (pleated media) |
| Airflow Support | Up to 100 L/min |
| Dust Holding | Extended due to large surface area |
| Compatibility | ResMed AirSense / Aircurve 10 and 11 |
🔄 Compared to Standard ResMed Filter:
| Feature | ResMed OEM Filter | CSSpring ULTRA Filter |
|---|---|---|
| Filtration Class | Basic (non-HEPA) | H13 HEPA + Carbon |
| Efficiency | ~60–80% (≥5 μm) | ≥99.95% @ 0.3 μm |
| Odor/VOC Removal | ❌ | ✅ 2mm (carbon layer) |
| Surface Area | c | |
| Protection Level | Basic device protection | User-level air purification |
| Filter Layers | 1–2 | 3 layers |
Usage Notes:
- Replace every 1–3 months, or sooner in dusty environments.
- Designed as supplemental filtration. Not a medical replacement.
- Not FDA-cleared; consult your physician before modifying CPAP equipment.