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6 Airflow Performance
Airflow performance data is based on cooling performance with a coil and no filter
in place. Check the performance table for appropriate unit size selection.
External static pressure should stay within the minimum and maximum limits
shown in the table below in order to ensure proper operation of both cooling,
heating, and electric heating operation.
6.1 Uncased Unit
Model
Motor Speed
1
2
18
3
4
5
1
2
24
3
4
5
1
2
30
3
4
5
1
2
36
3
4
5
Table 4
Air performance - uncased unit
Bold outlined areas represent airflow outside of the required 300-450 cfm/ton
range.
NOTES:
1.
Airflow data is without filter or electric heat. Electric Heater adds 0.05 in.
static pressure.
2.
Use wet coil data for determining cooling airflow.
3.
Bottom louver panel adds 0.05 in. static pressure.
Bosch BCA Series Air Handler - BTC 761703106 A (03.2023)
0[0]
0.1[.025]
0.15[.0375]
670
638
741
925
860
819
1069
1005
973
1193
1140
1106
1288
1221
1177
741
670
638
860
819
925
1069
1005
973
1193
1140
1106
1288
1221
1177
691
647
800
1025
921
871
1106
1059
1203
1339
1266
1224
1468
1399
1361
800
691
647
871
1025
921
1203
1106
1059
1339
1266
1224
1468
1399
1361
SCFM, Uncased
External Static Pressure-Inches W.C. [kPa]
0.2[.050]
0.3[.075]
612
545
788
727
941
886
1071
970
1133
1024
545
612
788
727
886
941
970
1071
1133
1024
602
530
723
820
1011
916
1085
1181
1323
1253
602
530
820
723
1011
916
1181
1085
1323
1253
Installation Instructions
0.5[.125]
0.6[.150]
0.4[.100]
403
336
470
655
588
500
550
826
683
850
700
560
895
745
575
470
403
336
588
500
655
826
550
683
850
700
560
895
745
575
460
380
300
628
536
448
729
636
822
729
978
859
1061
900
760
460
380
300
628
536
448
822
729
636
859
729
978
760
1061
900
| 9
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