Posted by Victor (24.240.219.36) on November 28, 2001 at 16:51:54:
In Reply to: Yawning and CHs......Good or Bad........ posted by Tim T on November 28, 2001 at 16:07:23:
was in a plant with everyone yawning including me after a few minutes and learned they were using CO2 in their environmental chambers, suggested they switch to nitrogen, cheaper and works better. People yawn in church and auditoriums, not enough O2, too much CO2, can cause a CH in some, mostly the lack of O2. Plus you are inhaling whatever everybody is exhaling. Since the energy crisis, many public buildings cut their air exhange from 6 complete air changes per hour to only 100 cubic feet per hour per person. Heaven help you if you get a visitor. Wants to make you open a window, if you can find one.