TSI IAQ50 - Manual (Page 17)

17
Using CO
2
:
%OA= (C
R
–C
S
) / (C
R
–C
O
) x 100%
where %OA = Percentage of outside
air
C
R
= Concentration CO
2
of
return air
C
S
= Concentration CO
2
of
supply air
C
O
= Concentration CO
2
of
outside air
Using Temperature:
%OA= (T
R
-T
S
) / (T
R
-T
O
) x 100%
where %OA = Percentage of outside
air
T
R
= Temperature of return
air
T
S
= Temperature of supply
air
T
O
= Temperature of outside
air