# K003973: Respiratory Humidifier, Model HC150

- Pathway: 510(k) (Traditional)
- Applicant: Fisher & Paykel Healthcare, Ltd.
- Decided: Jun 1, 2001 after 161 days
- Product code: BTT (Humidifier, Respiratory Gas, (Direct Patient Interface))
- Device class: 2
- Regulation: 21 CFR 868.5450
- Recalls of this device: none
- Data: FDA decisions to Oct 25, 2026; recalls to Oct 12, 2026

## Lineage
No predicates in its family tree.
2 later devices descend from it; 2 cite it directly.
0 of 3 devices in its family (counting itself) have a Class I recall.

## Predicates on the family tree (from the FDA summary)
- None. FDA has not posted a summary or statement for it, so its predicates are not known.

## Most influential descendants
- K223684: F&P 820 Humidification System (2023), 0 descendants of its own
- K050990: Remrest Heated Humidifier (2005), 0 descendants of its own

Source page: https://510kreport.com/device/K003973
Methodology: https://510kreport.com/methodology