11
0[0]
0.1[.025]
0.2[.050]
0.3[.075] 0.4[0.100] 0.5[0.125] 0.6[0.150] 0.7[0.175] 0.8[0.200]
CFM
1272
1240
1202
1157
1114
1066
912
850.3
792
Watts
460
450
440
431
424
410
374
364
350
Current/A
1.99
1.95
1.90
1.86
1.83
1.77
1.62
1.57
1.51
CFM
1570
1534
1490
1442
1387
1335
1278
1208
977
Watts
515
504
492
479
470
458
445
429
384
Current/A
2.26
2.20
2.15
2.09
2.04
1.99
1.93
1.86
1.66
CFM
1780
1746
1704
1647
1570
1537
1405
1220
1166
Power/W
641
626
610
594
577
561
536
501
469
Current/A
2.79
2.72
2.65
2.58
2.5
2.43
2.36
2.28
2.03
CFM
1336
1310
1282
1234
1182
1140
1049
925
833
Watts
492
483
474
463
452
443
422
393
374
Current/A
2.24
2.22
2.17
2.13
2.10
1.93
2.03
1.90
1.87
CFM
1654
1610
1569
1510
1461
1394
1350
1265
1034
Watts
550
537
526
512
503
489
475
458
416
Current/A
2.40
2.38
2.35
2.32
2.30
2.18
2.16
2.08
2.04
CFM
1918
1875
1817
1771
1715
1651
1584
1511
1395
Power/W
717
703
686
670
652
635
617
600
570
Current/A
3.20
3.18
3.14
3.10
3.04
3.00
2.90
2.87
2.85
CFM
Watts
Current/A
CFM
Watts
Current/A
CFM
Power/W
Current/A
Model
Number
Motor
Speed
CFM Wet Coil without filter and Electric Heat
External Static Pressure-Inches W.C.[kPa]
60
Low
Medium
High
42
Low
Medium
High
48
Low
Medium
High
--- Shaded
boxes
represent airflow outside the required 300-450 cfm/ton.
NOTES: Airflow based upon cooling performance at 230V with no electric heat and no filter.
The air distribution system has the greatest effect on airflow. The duct system is totally controlled by the contractor. For this reason, the contractor
should use only industry-recognized procedures.
Heat pump systems require a specified airflow for electric heat operating. Each ton of cooling requires between 350 and 450 cubic feet of air per
minute (CFM), or 400 CFM nominally.
Duct design and construction should be carefully done. System performance can be lowered dramatically through bad planning or workmanship.
Air supply diffusers must be selected and located carefully. They must be sized and positioned to deliver treated air along the perimeter of the
space. If they are too small for their intended airflow, they become noisy. If they are not located properly, they cause drafts. Return air grilles must
be properly sized to carry air back to the blower. If they are too small, they also cause noise.
The installers should balance the air distribution system to ensure proper quiet airflow to all rooms in the home. This ensures a comfortable living
space.
An air velocity meter or airflow hood can be used to balance and verify branch and system airflow (CFM).
I
MPORTANT:
1. If unit is converted to downflow, the airflow for model 18 must be between 350 and 450 cfm/ton.
2. When model 44 used for mobile home, you need to ensure that the air volume is not less than 1335 CFM.
3. When model 48 used for mobile home, you need to ensure that the air volume is not less than 1584 CFM.
1726
678
2.95
1983
695
3.02
2138
793
3.45
1693
658
2.87
1933
675
2.93
2086
773
3.37
1655
639
2.78
1879
655
2.85
2024
751
3.27
1637
619
2.69
1828
635
2.76
1952
726
3.17
1584
602
2.62
1760
615
2.67
1873
702
3.06
1500
576
2.52
1685
596
2.59
1797
679
2.97
1421
553
2.42
1597
574
2.5
1722
658
2.88
1328
526
2.31
1507
550
2.4
1646
638
2.79
1217
495
2.18
1403
522
2.28
1516
604
2.65
