FDA PRODUCT CODE · CLASS II
BTT — Humidifier, Respiratory Gas, (Direct Patient Interface)
What these counts are not
Clearance and recall counts are SPEQ’s aggregation of FDA’s own published records for the code. A recall count is a measure of history, not of a device’s safety, neither number is an FDA rating, and SPEQ is not affiliated with the FDA.
What this classification requires
Every statement below is FDA’s own classification record for this product code, quoted from the device classification field reference. The SPEQ reading beneath each one is SPEQ’s interpretation of what it means for the work, and is not FDA text.
510(K)
SPEQ READINGA premarket notification under 21 CFR Part 807 Subpart E is the route for this code. The submission argues substantial equivalence to a legally marketed predicate, so the engineering question is which predicate the design can actually be compared against, and the evidence question is what testing supports that comparison.
Class II (moderate to high risk): general controls and special controls
SPEQ READINGSpecial controls are the distinguishing feature: performance standards, guidance documents, patient registries or postmarket surveillance named for the device type. Find the special controls before designing the test plan — they usually name the tests.
Device is eligible for The Voluntary Malfunction Summary Reporting Program
SPEQ READINGMalfunctions for this code may be reported in periodic summary form rather than as individual MDRs under 21 CFR Part 803. Eligibility is a property of the product code; using it is a decision the manufacturer makes and must be able to justify.
Not exempt due to Good Manufacturing Practice (GMP)/Quality System
SPEQ READINGThe full Quality Management System Regulation (21 CFR 820, incorporating ISO 13485:2016) applies, and is what an FDA inspection of this device will be conducted against.
Device is not implantable
SPEQ READINGNo implant-specific expectations attach from the classification itself.
Device is not used for life sustaining purposes
SPEQ READINGNo life-sustaining designation attaches to this code.
Device is not a candidate for a third party review program
SPEQ READINGFDA reviews any premarket notification for this code directly.
Other product codes under 21 CFR 868.5450
One regulation usually governs several product codes. These share this code’s regulation, and therefore its classification basis.
21 CFR 868.5450 — Respiratory gas humidifier
The classification regulation for this product code, as published by the Office of the Federal Register. This is the regulation text itself — no SPEQ interpretation appears in it.
(a) Identification. A respiratory gas humidifier is a device that is intended to add moisture to, and sometimes to warm, the breathing gases for administration to a patient. Cascade, gas, heated, and prefilled humidifiers are included in this generic type of device.
(b) Classification. Class II (performance standards).
Source: Electronic Code of Federal Regulations, Title 21. 21 CFR is a work of the United States Government and is in the public domain. SPEQ read this section on October 21, 2026. CFR is amended continuously, so verify against the source before acting on it: read 21 CFR 868.5450 on eCFR →
Recent clearances
Recent recalls
When unintentionally disconnected from power source, humidifier device (used to deliver high flow warmed and humidified respiratory gases) may sound audible alert for less than 120 seconds, which may delay user awareness to reconnect power, which could lead to oxygen desaturation, hypoxia. Disinfect
Manufacturing error in humidification chamber may cause an overfill/overflow condition of the chamber. The may case a water back-up into the patient circuit resulting in an excessive amount of water entering the airway/lungs of the ventilated patient.
Manufacturing error in humidification chamber may cause an overfill/overflow condition of the chamber. The may case a water back-up into the patient circuit resulting in an excessive amount of water entering the airway/lungs of the ventilated patient.
Manufacturing error in humidification chamber may cause an overfill/overflow condition of the chamber. The may case a water back-up into the patient circuit resulting in an excessive amount of water entering the airway/lungs of the ventilated patient.
Manufacturing error in humidification chamber may cause an overfill/overflow condition of the chamber. The may case a water back-up into the patient circuit resulting in an excessive amount of water entering the airway/lungs of the ventilated patient.
Product is being recalled due to complaints that the inspiratory and expiratory tubes are transposed.
When turned on, the Neptune heater may cause an artifact on the patient's heart monitor.
The recall was initiated because certain lot dates of the RT240 Adult Breathing Circuit Kits manufactured on or before June 27, 2008 include a heated breathing circuit that may be more susceptible to damage when used in excess of the specified seven-day maximum duration of use, which may increase th
Source: FDA device classification, 510(k)/PMA, and recall datasets. Recall entries count distinct FDA recall numbers, so one recall event affecting several products appears as several entries. Browse every product code SPEQ tracks →