TN 72: Ventilation Requirements and Rationale behind. Standards and Regulations of dwellings, office rooms and classrooms | AIVC
![Why do some ASHRAE 170 ventilation rates appear as people and area based ventilation instead of cooling and heating air changes per hour? Why do some ASHRAE 170 ventilation rates appear as people and area based ventilation instead of cooling and heating air changes per hour?](http://software.trane.com/RightNow/0716-ASHRAE170/7161.png)
Why do some ASHRAE 170 ventilation rates appear as people and area based ventilation instead of cooling and heating air changes per hour?
![ASHRAE A Ventilation Standard for Residential Structures Ventilation and Acceptable Indoor Air Quality in Low- Rise Residential Buildings. - ppt download ASHRAE A Ventilation Standard for Residential Structures Ventilation and Acceptable Indoor Air Quality in Low- Rise Residential Buildings. - ppt download](https://images.slideplayer.com/24/7091682/slides/slide_2.jpg)