Quick answer: This is the genuine ResMed anti-bacterial filter in a 50-pack (part 24966; 1-pack = 24966-1) — a filter that fits between the ventilator's air outlet and the breathing circuit to protect both the patient and the device from bacterial and viral contamination. It's used with ResMed Stellar, Astral, S9, and Lumis devices (and Elisée). Important: it must not be used with the H4i humidifier, and the device requires a "Learn Circuit" procedure after fitting so it compensates for the filter's impedance. Single-patient use; this bulk 50-pack suits clinics and providers.
Important — ventilator/clinical component
- Bidirectional protection — the anti-bacterial filter helps prevent cross-contamination between the patient and the device (and, in reprocessing, between patients).
- ⚠️ Do not use with the H4i humidifier.
- "Learn Circuit" required — after fitting the filter to the air outlet and connecting the tubing, run the device's Learn Circuit so it compensates for the added impedance. ResMed recommends a low-impedance filter (less than ~2 cmH₂O).
- Check and replace — regularly check for moisture or contaminants, and replace per the manufacturer's specifications. Single-patient use.
This listing is informational and is not medical advice; circuit setup is determined by the clinical team.
What's included
- 50 × ResMed anti-bacterial filter (adult, part 24966)
Ventilator, circuit, tubing, and mask not included. (1-pack available as 24966-1.)
About this part
The anti-bacterial filter sits inline at the ventilator's air outlet — a barrier that captures airborne bacteria and viruses so they don't pass between the patient and the machine. It's an important hygiene component in ventilation, especially where a device is used across patients (with proper reprocessing).
- Fits at the air outlet — filter goes on the device outlet; the air tubing attaches to the other side, then the mask/circuit.
- Protects device and patient — reduces contamination in both directions.
- Low impedance — designed for minimal airflow resistance (ResMed advises <2 cmH₂O); the Learn Circuit compensates for it.
- Bulk 50-pack — the practical clinical/provider quantity (each is single-patient use).
Compatibility: ResMed Stellar, Astral, S9, Lumis (and Elisée 250/350). Not for use with the H4i humidifier. Confirm against the device's clinical guide.
Key features
- Genuine ResMed anti-bacterial filter (24966) — adult, 50-pack.
- Bidirectional protection — patient and device.
- Fits Stellar / Astral / S9 / Lumis — not with the H4i.
- Low impedance — Learn Circuit compensates after fitting.
- Single-patient use — bulk clinical quantity.
Specifications
| Specification | Detail |
| Product type | Anti-bacterial breathing filter (adult) |
| Compatible devices | ResMed Stellar, Astral, S9, Lumis (and Elisée 250/350) |
| Not for | Use with the H4i humidifier |
| Function | Bidirectional bacterial/viral filtration at the air outlet |
| Impedance | Low (ResMed recommends <2 cmH₂O); Learn Circuit compensates |
| Pack | 50 (1-pack = 24966-1) |
| Use | Single-patient use; replace per specification; check for moisture |
| Setup | "Learn Circuit" required after fitting |
| Included | 50 filters |
| Not included | Ventilator, circuit, tubing, mask |
| Prescription | Clinician-directed (ventilation component) |
| ResMed reference / SKU | 24966 (50pk) · 24966-1 (1pk) |
| Brand | ResMed |
Frequently asked questions
What does the anti-bacterial filter do? It fits at the ventilator's air outlet and filters bacteria and viruses in both directions — protecting the patient and the device from contamination.
Which devices does it work with? ResMed Stellar, Astral, S9, and Lumis (and Elisée). Do not use it with the H4i humidifier.
Do I need to do anything after fitting it? Yes — run the device's "Learn Circuit" procedure so it compensates for the filter's impedance.
How many are in the pack? 50 (a 1-pack is available as 24966-1). Each filter is single-patient use.
How often do I replace it? Per the manufacturer's specification, and sooner if you see moisture or contaminants.
Do I need a prescription? This is a ventilation component used under clinical direction. Contact us to confirm requirements.
How is it delivered? Given the clinical nature of ventilator components, please contact us to confirm availability and delivery options.
This is a component of a ventilation circuit. Do not use with the H4i, run the Learn Circuit after fitting, check for moisture, and replace per specification. Circuit setup is determined by the clinical team. This listing is informational and is not medical advice.
Can I get it delivered in Brooklyn or shipped nationwide? Yes — Task Supply Corp offers USPS shipping throughout the continental U.S., plus local pickup and delivery in Brooklyn and all five boroughs of New York City.