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People activity is always 70, WORK_EFF_SCH is 1, WORK_EFF_SCH is 0.5, and AIR_VELO_SCH is 0.2.
The Fanger model is the only one that uses the above inputs. The other models only look at temperature and humidity. The air velocity is reasonable. An activity level of 70W is equivalent to sleeping. Yet, the work efficiency schedule of 0.5 is saying that half of the 70W is going towards moving something and only 35W are left to warm the body. That's why the PMV and PPD values indicate the people are cold. For an office setting, work efficiency is typically set to zero, and the activity level somewhere between 100-150W/person. Reference table of metabolic rates in the People section of the Input Output Reference.