BLOWER PERFORMANCE SPECIFICA
TIONS
30
Rev. 2
1. Units are shipped without filter(s). CFM in chart is without filter(s).
2. All furnaces shipped as high speed for cooling. Installer should adjust blower speeds as needed.
3. INSTALLATION IS TO BE ADJUSTED TO OBTAIN TEMPERATURE RISE WITHIN THE RANGE SPECIFIED ON THE RATING PLATE.
4. The chart is for information only. For satisfactory operation, external static pressure not to exceed value shown on rating plate. The shaded area
indicates ranges in excess of maximum external static pressure allowed when heating.
5. The above chart is for U.S. furnaces installed at 0-2000 feet. At higher altitudes, a properly derated unit will have approximately the same
temperature rise at a particular CFM, while the ESP at that CFM will be lower.
TWO ST
A
G
E
Blower Speeds for each firing rate are set independant of each other.
External Static Pressure, Inches Water Column
0.1
0.2
0.3
0.4
0.5
0.6
CFM
RISE,
HIGH
FIRE
RISE,
LOW
FIRE
CFM
RISE,
HIGH
FIRE
RISE,
LOW
FIRE
CFM
RISE,
HIGH
FIRE
RISE,
LOW
FIRE
CFM
RISE,
HIGH
FIRE
RISE,
LOW
FIRE
CFM
RISE,
HIGH
FIRE
RISE,
LOW
FIRE
CFM
GUIS070_35
HIGH
3.5
1695
30
-
1625
31
-
1580
32
-
1520
34
-
1450
35
-
1365
(30-60)
MED-HI
3.0
1485
34
-
1450
35
-
1400
37
-
1350
38
-
1295
39
-
1235
High Fire: Med-Lo
MED-LO
3.0
1235
41
-
1200
43
30
1180
43
30
1140
45
31
1115
46
32
1050
Low Fire: Low
LOW
2.5
1095
47
33
1070
48
33
1050
49
34
1025
50
35
975
52
37
950
GUIS090_30
HIGH
3.5
1630
42
-
1560
44
-
1550
44
-
1465
47
-
1380
49
35
1275
(35-65)
MED-HI
3.0
1360
50
35
1325
51
36
1290
53
37
1215
56
39
1155
59
41
1070
High Fire: High
MED-LO
2.0
920
-
52
920
-
52
900
-
53
890
-
54
850
-
56
800
Low Fire: Med-Lo
LOW
1.5
770
-
62
750
-
64
740
-
64
730
-
65
690
-
-
660
GUIS090_50
HIGH
5.0
2250
-
-
2185
-
-
2120
-
-
2030
-
-
1975
35
-
1885
(35-65)
MED-HI
4.0
1775
38
-
1750
39
-
1735
39
-
1690
40
-
1650
41
-
1600
High Fire: Med-Lo
MED-LO
3.5
1320
52
36
1315
52
36
1315
52
36
1315
52
36
1280
53
37
1240
Low Fire: Low
LOW
3.0
1180
58
40
1180
58
40
1175
58
41
1170
58
41
1140
60
42
1120
GUIS115_50
HIGH
5.0
2330
37
-
2245
38
-
2165
39
-
2065
41
-
1985
43
-
1885
(35-65)
MED-HI
5.0
2120
40
-
2070
41
-
2020
42
-
1940
44
-
1850
46
-
1775
High Fire: Med-Lo
MED-LO
4.0
1875
45
-
1840
46
-
1800
47
-
1735
49
-
1685
51
35
1600
Low Fire: Low
LOW
3.0
1290
-
46
1275
-
47
1250
-
48
1235
-
48
1210
-
49
1170
GUIS140_50
HIGH
5.0
2455
-
-
2390
-
-
2290
45
-
2200
46
-
2050
50
-
1935
(45-75)
MED-HI
5.0
2050
50
-
2025
50
-
1965
52
-
1890
54
-
1810
56
-
1715
High Fire: Med-Hi
MED-LO
4.0
1715
60
-
1700
60
-
1660
62
-
1615
63
-
1555
66
46
1472
Low Fire: Low
LOW
3.5
1450
70
49
1436
71
50
1413
72
51
1380
74
52
1338
-
53
1280
GCIS070_35
HIGH
3.5
1655
-
-
1580
-
-
1500
-
-
1445
35
-
1366
37
-
1280
(35-65)
MED-HI
3.0
1530
-
-
1470
35
-
1400
37
-
1345
38
-
1280
40
-
1210
High Fire: Med-Lo
MED-LO
3.0
1090
47
-
1075
48
-
1055
48
-
1015
50
35
975
52
37
915
Low Fire: Low
LOW
2.5
945
54
38
935
55
38
915
56
39
890
57
40
850
60
42
810
GCIS090_50
HIGH
5.0
2110
-
-
2030
-
-
1960
-
-
1870
-
-
1780
-
-
1680
(45-75)
MED-HI
4.0
1830
-
-
1765
-
-
1710
-
-
1640
-
-
1550
-
-
1470
High Fire: Med-Lo
MED-LO
3.5
1260
54
-
1255
54
-
1230
55
-
1200
57
-
1170
58
-
1115
Low Fire: Low
LOW
3.0
1015
67
47
1000
68
48
980
70
49
964
71
49
930
73
51
875
MODEL
(Htg. Speed
as Shipped)
MOTOR
SPEED
TONS AC
@ 0.5" ESP
CFM & Temperature Rise vs. External Static Pressue