Lennox Harmony II Zone Control System Installation Instructions Manual page 16

Pulse Width Modulation (PWM) Multiplier Chart
1.0
0.90
0.80
0.70
Note − For 75 % reduction use minimum
CFM
0.60
EXAMPLE 2 part 2
0.50
0.40
EXAMPLE 2 part 1
0.30
EXAMPLE 1
0.20
0.10
0.0
25 30 35 40
PERCENT AIR
(% of Total Air of All Zones Calling)
45 50 55 60 65
Figure 11
Page 16
0 %
REDUCTION
(Cooling)
20 %
REDUCTION
(Heating)
40 %
REDUCTION
(Heating)
50 %
REDUCTION
(Continuous Air)
70 75 80 85 90 95 100