Lennox HARMONY II, Installation Instructions Manual, Page: 30 / 30

Page 30
505023M 04/06
PIAB Calculation Worksheet
PIAB = [(Required CFM − Minimum CFM) / (Maximum CFM − Minimum CFM)] * 100
Sample CFM
'
Required Minimum Maximum Minimum
Sample PIAB = [(___1020 − 720 ) / ( 2200 − 720 )] x 100
= =
b b
Sample PIAB = [( 300 ) / ( 1500 )] x 100
=
b
Sample PIAB = [ 0.2 ] x 100 = 20 %
Zone 1 CFM
'
Required Minimum Maximum Minimum
ZONE 1 PIAB = [( − ) / ( − )] x 100
= =
b b
ZONE 1 PIAB = [( ) / ( )] x 100
=
b
ZONE 1 PIAB = [ ] x 100 = %
Zone 2 CFM
'
Required Minimum Maximum Minimum
ZONE 2 PIAB = [( − ) / ( − )] x 100
= =
b b
ZONE 2 PIAB = [( ) / ( )] x 100
=
b
ZONE 2 PIAB = [ ] x 100 = %
Zone 3 CFM
'
Required Minimum Maximum Minimum
ZONE 3 PIAB = [( − ) / ( − )] x 100
= =
b b
ZONE 3 PIAB = [( ) / ( )] x 100
=
b
ZONE 3 PIAB = [ ] x 100 = %
Zone 4 CFM
'
Required Minimum Maximum Minimum
ZONE 4 PIAB = [( − ) / ( − )] x 100
= =
b b
ZONE 4 PIAB = [( ) / ( )] x 100
=
b
ZONE 4 PIAB = [ ] x 100 = %