Smiths Medical Asd, Inc.

Jerry F Wasinger

Cary McGhin

Cary E Mcghin

A heater system is provided for a respiratory system having a PID feedback control in which the coefficients are adjusted, such as in a warm-up process, to correspond to a likely flow rate of gas through a chamber of heated water based on the difference between heat input and heat output in relation to a temperature set point without the need to directly monitor flow rate or humidity level. A steady-state adjustment of the coefficients based on the behavior of the measured temperature in relation to the set point is also disclosed.

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Norcross, GA, United States of America

Jerry F Wasinger