CO2 concentrations greater than ________ parts per million (ppm) above outdoor conditions generally indicate inadequate ventilation.
A)330
B)530
C)830
D)1,030

Question

Quizplus · Accepted Answer

CO2 concentrations greater than 530 parts per million (ppm) above outdoor conditions generally indicate inadequate ventilation. CO2 builds up in a space when there is not enough ventilation.

CO2 Concentrations Greater Than ________ Parts Per Million (Ppm) Above