25.05.05-A
page 29 of 30
9.3 psychometric
chart (with ft and lb)
Humidification
shortfall = X2 – X1 = 51 lb
X2
X1
70°F, 53 % rF
V
1
= 13.3 ft^
3
/lb
ft^3/lbm
Btu/lbm
100 %
gr
ai
n
s/
lbm
30 F, 20 % RH
25
%
50
%
75
%
R
el
at
iv
e
Hu
m
id
ity
80 F, 65 % RH