When using a steam humidifier, what steam pressure should be used? Power Engineering When using a steam humidifier, what steam pressure should be used? a) 5 - 10 kPa b) 20 - 40 kPa c) 35 - 70 kPa d) 100 - 120 kPa e) 150 - 200 kPa Answer: C Learn More : Share this Share on FacebookTweet on TwitterPlus on Google+