Can a Firesafe Cannula Valve with used with a CPAP ventilator with heated humidifier?

Yes, the Firesafe Cannula Valve can be fitted to the small bore oxygen tubing inlet, whether that is fed into the CPAP ventilator or into a port in the patient breathing circuit. The temperatures of the gas delivered are very low in comparison to the activation temperature of the valve, so there is no risk of it being activated by warm humid air used for ventilation.