COOLING LOAD BTU
Outside |
| Cooling Load (Btuh) @ Inside Design Temp 75°F and 50% Relative Humidity |
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Enthalpy |
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Btu/lb | HRVBBLHU1150 | HRVBBLHU1250 | HRVBBSVC1150 | HRVBBSVC1200 | HRVBBLVU1150 | HRVBBLVU1200 | HRVBBLVU1330 |
30 | 670 | 1,071 | 780 | 990 | 770 | 990 | 1,390 |
31 | 1,090 | 1,741 | 1,300 | 1,650 | 1,290 | 1,650 | 2,310 |
32 | 1,509 | 2,411 | 1,820 | 2,310 | 1,800 | 2,310 | 3,240 |
33 | 1,928 | 3,080 | 2,340 | 2,970 | 2,310 | 2,970 | 4,170 |
34 | 2,347 | 3,750 | 2,860 | 3,630 | 2,830 | 3,630 | 5,090 |
35 | 2,766 | 4,419 | 3,380 | 4,290 | 3,340 | 4,290 | 6,020 |
36 | 3,185 | 5,089 | 3,910 | 4,950 | 3,860 | 4,950 | 6,940 |
37 | 3,604 | 5,759 | 4,430 | 5,610 | 4,370 | 5,610 | 7,870 |
38 | 4,023 | 6,428 | 4,950 | 6,270 | 4,890 | 6,270 | 8,790 |
39 | 4,442 | 7,098 | 5,470 | 6,930 | 5,400 | 6,930 | 9,720 |
40 | 4,861 | 7,767 | 5,990 | 7,590 | 5,910 | 7,590 | 10,650 |
41 | 5,280 | 8,437 | 6,510 | 8,250 | 6,430 | 8,250 | 11,570 |
42 | 5,699 | 9,107 | 7,030 | 8,910 | 6,940 | 8,910 | 12,500 |
The cooling load chart shows loads in Btuh as well. To use the cooling load chart, first find the design enthalpy from a psychrometric chart using the design dry bulb and wet bulb temperatures. (See psychrometric chart on p. 11.) The cooling load can then be found for a range of enthalpies for each ventilator.
EXAMPLE: The cooling design dry bulb temperature for Milwaukee, WI is 87°F and the average wet bulb at that temperature is 73°F. On the psychrometric chart the enthalpy is about 37.7 Btu/lb of dry air which will round up to 38 Btu/lb of dry air. In the left column, at 38 Btu/lb the HRVBBLHU1250 would have an additional cooling load of 6428 Btuh. This additional load should be taken into account when sizing the air cooling equipment.
