Installation Guide
10 18-HD80D1-6E-EN
Damper
Diameter
Damper
Diameter
Damper
Diameter
Damper
Diameter
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Damper
Diameter
Damper
Diameter
CFM CFM
Damper
Diameter
Damper
Diameter
CFM CFM
500 600 700 800
4" 9% 12% 16% 4" 7% 10% 13% 4" 6% 9% 11% 4" 6% 8% 10%
6" 19% 27% 35% 6" 16% 23% 29% 6" 14% 19% 25% 6" 12% 17% 22%
7" 26% 36% 46% 7" 22% 30% 38% 7" 19% 26% 33% 7" 16% 23% 29%
8" 34% 48% 62% 8" 29% 40% 52% 8" 25% 34% 44% 8" 22% 30% 39%
9" 44% 61% 79% 9" 36% 51% 66% 9" 31% 44% 56% 9" 27% 38% 49%
10" 54% 78% 98% 10" 45% 65% 82% 10" 39% 56% 70% 10" 34% 49% 61%
12" 79% 100% 100% 12" 66% 87% 117% 12" 56% 74% 100% 12" 49% 65% 88%
14" 100% 100% 100% 14" 87% 100% 100% 14" 74% 100% 100% 14" 65% 94% 100%
16" 100%
100% 100% 16" 100% 100% 100% 16" 99% 100% 100% 16" 86% 100% 100%
18" 100% 100% 100% 18" 100% 100% 100% 18" 100% 100% 100% 18" 100% 100% 100%
Damper
Diameter
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Diameter
Damper
Diameter
Damper
Diameter
Damper
Diameter
CF
M CFM
Damper
Diameter
Damper
Diameter
Damper
Diameter
CFM CFM
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Damper
Diameter
Damper
Diameter
Damper
Diameter
CFM CFM
Damper
Diameter
CFM
900 1000 1100
4" 5% 7% 9% 4" 4% 6% 8% 4" 4% 5% 7% 4" 4% 5% 7%
6" 11% 15% 19% 6" 10% 14% 18% 6" 9% 12% 16% 6" 8% 11% 15%
7" 14% 20% 26% 7" 13% 18% 23% 7" 12% 16% 21% 7" 11% 15% 19%
8" 19% 27% 34% 8" 17% 24% 31% 8" 16% 22% 28% 8" 14% 20% 26%
9" 24% 34% 44% 9" 22% 31% 40% 9" 20% 28% 36% 9" 18% 25% 33%
10" 30% 43% 54% 10" 27% 39% 49% 10" 25% 35% 45% 10" 23% 33% 41%
12" 44% 58% 78% 12" 40% 52% 70% 12" 36% 47% 64%
58%
14" 58% 84% 100% 14" 52% 76% 96% 14" 47% 69% 87% 14" 43% 63% 80%
16" 77% 100% 100% 16" 69% 98% 100% 16" 63% 89% 100%
100%
18" 100% 100% 100% 18" 90% 100% 100% 18" 82% 100% 100% 18" 75% 100% 100%
Damper
Diameter
Damper
Diameter
Damper
Diameter
CFM CFM
Damper
Diameter
Damper
Diameter
Damper
Diameter
CFM
Damper
Diameter
Damper
Diameter
CFM
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
CFM
Damper
Diameter
Damper
Diameter
CFM CFM
Damper
Diameter
Damper
Diameter
1300 1400 1500
CFM
1600
4" 3% 5% 6% 4" 3% 4% 6% 4" 3% 4% 5% 4" 3% 4% 5%
6" 7% 10% 13% 6" 7% 10% 13% 6" 6% 9% 12% 6" 6% 8% 11%
7" 10% 14% 18% 7" 9% 13% 16% 7" 9% 12% 15% 7" 8% 11% 14%
8" 13% 18% 24% 8" 12% 17% 22% 8" 11% 16% 21% 8" 11% 15% 19%
9" 17% 23% 30% 9" 16% 22% 28% 9" 15% 20% 26% 9" 14% 19% 25%
10" 21% 30% 38% 10" 19% 28% 35% 10" 18% 26% 33% 10" 17% 24% 31%
12" 30% 40% 54% 12" 28% 37% 50% 12" 26% 35% 47% 12" 25% 33% 44%
14" 40% 58% 73% 14" 37% 54% 68% 14" 35% 50% 64% 14" 33% 47% 60%
16"
53% 75% 96% 16" 49% 70% 89% 16" 46% 65% 83% 16" 43% 61% 78%
18" 69% 96% 100% 18" 64% 89% 100% 18" 60% 83% 100% 18" 56% 78% 100%
Damper
Diameter
Damper
Diameter
Damper
Diameter
CFM
Damper
Diameter
Damper
Diameter
CFM CFM
Damper
Diameter
Damper
Diameter
Damper
Diameter
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Less Aggressive
Normal
More Aggressive
Damper
Diameter
Damper
Diameter
Damper
Diameter
CFM CFM cfm
Damper
Diameter
CFM
1800 1900 2000 2200
4" 2% 3% 4% 4" 2% 3% 4% 4" 2% 3% 4% 4" 2% 3% 4%
6" 5% 8% 10% 6" 5% 7% 9% 6" 5% 7% 9% 6" 4% 6% 8%
7" 7% 10% 13% 7" 7% 9% 12% 7" 7% 9% 12% 7" 6% 8% 10%
8" 10% 13% 17% 8" 9% 13% 16% 8" 9% 12% 16% 8" 8% 11% 14%
9" 12% 17% 22% 9" 11% 16% 21% 9" 11% 15% 20% 9" 10% 14% 18%
10" 15% 22% 27% 10" 14% 21% 26% 10" 14% 20% 25% 10" 12% 18% 22%
12" 22% 29% 39% 12" 21% 27% 37% 12" 20% 26% 35% 12" 18% 24% 32%
14" 29% 42% 53% 14" 27% 40% 50% 14" 26% 38% 48% 14" 24% 34% 43%
16" 38%
54% 69% 16" 36% 51% 66% 16" 35% 49% 63% 16" 31% 44% 57%
18" 50% 69% 89% 18" 47% 66% 84% 18" 45% 63% 80% 18" 41% 57% 73%
Damper
Diameter
Damper
Diameter
Damper
Diameter
CFM CFM cfm
Damper
Diameter
CFM
MANUAL ZONE SIZING
Auto Zone Sizing is the optimal way to determine the amount of air flow into each zone, but this process is not
mandatory. Zone sizes can be set manually using the following guidelines.
EXAMPLE (highlighted below): A 2-zone, 3-ton AC system is configured to move 1200 CFM. Zone 1 has a 12”
zone damper and Zone 2 has a 16” zone damper.
The Normal sizing strategy would set Zone 1 at 43% and Zone 2 at 81%. If Zone 1 had two dampers (6” and 10”)
the zone size % should be added together (11% & 33%) and set to 44%.