9
AIR DELIVERY CURVE — 080-14
A97320
AIR DELIVERY CURVE — 040-14
A93074
AIR DELIVERY CURVE — 060-14
A97319
0.8
0.7
0.6
0.5
0.4
0.3
LOW
HEAT
HIGH
HEAT
Constant System
Curves
External Static Pressure (in. wc)
2 Ton 3 Ton
3
1
⁄
2
Ton
2
1
⁄
2
Ton
0.2
0.1
0
500 600 700 800 900 1000
CFM
1100 1200 1300 1400 1500
1
1
⁄
2
Ton
AIR DELIVERY CURVE — 100-20
A97322
AIR DELIVERY CURVE — 120-20
A98564
AIR DELIVERY CURVE — 080-20
A97321
0.8
0.7
0.6
0.5
0.4
0.3
LOW
HEAT
HIGH
HEAT
Constant System
Curves
External Static Pressure (in. wc)
1
1
⁄
2
Ton
2 Ton 3 Ton
3
1
⁄
2
Ton
2
1
⁄
2
Ton
0.2
0.1
0
CFM
500 600 700 800 900 1000 1100 1200 1300 1400 1500
0.8
0.7
0.6
0.5
0.4
0.3
LOW
HEAT
HIGH
HEAT
Constant System
Curves
External Static Pressure (in. wc)
2 Ton 3 Ton 3
1
⁄
2
Ton2
1
⁄
2
Ton
0.2
0.1
0
500 600 700 800 900 1000 1100
CFM
1200 1300 1400 1500
1
1
⁄
2
Ton
0.8
0.7
0.6
0.5
0.4
0.3
Constant System
Curves
External Static Pressure (in. wc)
3 Ton
3
1
⁄
2
Ton
2
1
⁄
2
Ton
0.2
0.1
0
600 800
CFM
1000 1200 1400
1600 1800 2000
4 Ton 5 Ton
HIGH
HEAT
LOW
HEAT
2 Ton
0.8
0.7
0.6
0.5
0.4
0.3
Constant System
Curves
External Static Pressure (in. wc)
3 Ton
3
1
⁄
2
Ton
2
1
⁄
2
Ton
0.2
0.1
0
700 900
CFM
1100 1300 1500
1700 1900 2100
4 Ton 5 Ton
HIGH
HEAT
LOW
HEAT
2 Ton
0.8
0.7
0.6
0.5
0.4
0.3
Constant System
Curves
External Static Pressure (in. wc)
3 Ton
3
1
⁄
2
Ton
2
1
⁄
2
Ton
0.2
0.1
0
700 900
CFM
1100 1300 1500
1700 1900 2100
4 Ton 5 Ton
HIGH
HEAT
LOW
HEAT
2 Ton
SINGLE
SIDE
RETURN
NOTE: Curves shown are when; 1 side only, both sides, a combination of 1 side and bottom, or bottom only return-air openings of the furnace are used
except as shown on the 120-20 curve.