Download Performance Tables for Blowers: BHP and RPM Values and more Study notes Electronics in PDF only on Docsity!
Air Handling Unit
Fan Selection Guide
This document applies to models:
DFG – Direct Fired Gas Heater
IFG – Indirect Fired Gas Heater
MUA – Tempered Air
NTS – Non-Tempered Supply
Table of Contents:
Page 2-4 Fan Selection Procedure
Page 5-9 Pressure Loss Tables
Page 10-15 Performance Tables
Page 16 Examples
K E E S
BENDING METAL •^ SCULPTING AIR
Fan Selection Procedure
KEES, Incorporated offers a wide range of air handlers capable of producing from 600 to 30,000 CFM. These
units may include tempering sections. The following procedure explains how to choose an air handler that will
meet the air flow, static pressure and heating and cooling requirements of a project.
Step #1 Determine the model of the air handler based on the tempering requirements.
Model Heating Section Cooling Section Comments DFG Direct Fired Gas Heater Any of the following cooling options can be included: · Dx Cooling Coil · Chilled Water Coil · Evaporative Cooler
IFG Indirect Fired Gas Heater MUA Electric Heater Hot Water Coil Steam Coil None Cooling only NTS None None Ventilation only
Step #2 Determine the air flow requirements (CFM) for the fan.
Codes, industry standard practices and heating and cooling loads may all be considered in establishing the
requirements.
Step #3 Determine the housing size of the air handler.
The table shown on the next page includes the five standard housing sizes, the models that are available with
each of them and the CFM ranges. In general, where possible, select the housing size with the air flow in the
normal range. It will have the best balance between initial cost, operating costs, stable performance range,
and noise generation.
Indirect Fired Heater - Units with indirect fired heaters require special consideration since the dimensions
of these heaters need to match up with the dimensions of the housing sizes. Therefore, it is necessary to
look at the column titled “IFG Heater” in the following table to verify that the correct sized heater is
available with a particular housing size. In instances where one heater size matches up with two housing
sizes then choose between the two housing sizes based on the air flow.
If the size of the heater is not given then it can be determined using the following equations:
T = LAT – EAT (Temperature rise = Leaving air temp. – Winter design temp.)
Required BTU = CFM * T * 1.08 ÷ 0.
Heater size (MBH) = Required BTU ÷ 1,000 (Round up to the nearest size heater)
Cooling coils, heating coils and evaporative coolers - It may be necessary to select a larger housing size
to accommodate a chilled water, Dx cooling coil, hot water or steam coil or an evaporative cooler to
prevent excessive face velocities. The three right hand columns show the maximum recommended CFM
for units with these options.
Step #6 Adjust for non-standard air conditions.
Elevations and/or discharge temperatures that are not at standard conditions will affect air density and must be taken into account. These air correction factors are summarized in the table below. To apply this information first adjust the total static pressure:
TSPcorrected = TSP x Air Correction Factor.
Then go back to Step #5 to select the fan at the design CFM and the corrected TSP. Finally, come back to Step #6 and correct the BHP value found in Step #5.
BHPcorrected = BHP ÷ Air Correction Factor.
The RPM does not change.
Air Correction Factor Air Altitude in Feet Above Sea Level Temp. 0 1,000 2,000 3,000 4,000 5,000 6, 0°F 0.87 0.91 0.94 0.98 1.01 1.05 1. 40°F 0.94 0.98 1 .02 1.06 1.10 1.14 1. 70°F 1.00 1.04 1.08 1.12 1.16 1.20 1. 100°F 1.06 1.10 1.14 1.19 1.23 1.28 1.
Step #7 Determine the correct motor size.
Drive losses are included in the fan performance tables. Therefore, simply use the brake horsepower value
found in Step #5 (or the corrected one from Step #6) and choose the next largest standard motor size.
Refer to page 16 for examples that illustrate these principles.
Worksheet
Step #1 Determine the model of the air handler DFG IFG MUA NTS circle one
Step #2 Determine the air flow requirements CFM
Step #3 Determine the housing size #1 #2 #2W #3 #4 circle one
Step #4 Determine the resistance to air flow T.S.P.
Step #5 Select the blower size and determine blower the BHP and RPM BHP
RPM
Step #6 Adjust for non-standard conditions Air Correction Factor
Step #7 Determine the motor size HP
Accessory Pressure Loss Data (inches of water) Housing #
V-bank Filters Filters in Intake Hood Aluminum Mesh Fiberglass Throwaway Pleated Aluminum Mesh CFM 1" 2" 1" 2" 1" 2" 1" 2" 600 .02 .04 .03 .04 .03 .04 .01. 800 .03 .04 .04 .04 .04 .04 .02. 1,000 .03 .05 .04 .05 .04 .05 .03. 1,200 .04 .06 .05 .06 .05 .06 .04. 1,400 .05 .06 .06 .07 .06 .07 .05. 1,600 .05 .07 .06 .08 .06 .08 .06. 1,800 .06 .08 .07 .09 .07 .09 .07. 2,000 .06 .09 .07 .10 .07 .10 .08. 2,200 .07 .09 .08 .11 .08 .11 .09. 2,400 .07 .10 .09 .12 .09 .12 .11. 2,600 .08 .11 .09 .13 .09 .13 .12. 2,800 .08 .11 .10 .14 .10 .14 .13. 3,000 .09 .12 .10 .15 .10 .15 .14. 3,200 .09 .13 .11 .16 .11 .16 .15. 3,400 .10 .13 .12 .16 .12 .16 .16. 3,600 .10 .14 .12 .17 .12 .17 .17.
Heating or Cooling Coils* Intake OA or RA DFG Electric Evap 1 Row 2 Rows 4 Rows 6 Rows CFM Hood Damper Heater Heater Cooler 8 FPI 8 FPI 8 FPI 8 FPI 600 .01 .01 .50 .01 .01 .03 .06 .12. 800 .01 .02 .50 .01 .01 .04 .08 .15. 1,000 .01 .02 .50 .01 .01 .05 .10 .19. 1,200 .02 .02 .50 .01 .01 .06 .12 .23. 1,400 .02 .03 .50 .02 .01 .07 .13 .27. 1,600 .03 .03 .50 .02 .03 .08 .15 .31. 1,800 .04 .03 .50 .02 .05 .09 .17 .35. 2,000 .05 .04 .50 .03 .08 .10 .19 .38. 2,200 .05 .04 .50 .03 .10 .11 .21 .42. 2,400 .06 .05 .50 .04 .12 .12 .23 .46. 2,600 .07 .05 .50 .04 .14 .13 .25 .50. 2,800 .08 .05 .50 .04 .16 .13 .27 .54. 3,000 .09 .06 .50 .05 .18 .14 .29 .58. 3,200 .09 .06 .50 .05 .20 .15 .31 .62. 3,400 .10 .07 .50 .06 .22 .16 .33 .65. 3,600 .11 .07 .50 .06 .24 .17 .35 .69 1.
- Add 30% for 10 FPI and 60% for 12 FPI Indirect Fired Heater (IFG) Downturn 100 150 200 250 CFM Plenum** MBH MBH MBH MBH 600 .01 NA NA NA NA 800 .01 .10 NA NA NA 1,000 .01 .12 NA NA NA 1,200 .01 .14 .11 NA NA 1,400 .03 .16 .12 NA NA 1,600 .04 .21 .13 .10 NA 1,800 .06 .26 .14 .10 NA 2,000 .07 .32 .15 .10. 2,200 .09 .39 .16 .11. 2,400 .10 .46 .18 .12. 2,600 .12 .55 .22 .13. 2,800 .14 .64 .25 .14. 3,000 .15 .74 .29 .17. 3,200 .17 .84 .33 .19. 3,400 .18 .95 .37 .22. 3,600 .20 1.06 .41 .25. ** Only on IFG units with downturn plenum - do not include on end discharge units
Accessory Pressure Loss Data (inches of water)
Housing #2W
V-bank Filters Filters in Intake Hood
Aluminum Mesh Fiberglass Throwaway Pleated Aluminum Mesh
CFM 1" 2" 1" 2" 1" 2" 1" 2"
Heating or Cooling Coils*
Intake OA or RA DFG Electric Evap 1 Row 2 Rows 4 Rows 6 Rows
CFM Hood Damper Heater Heater Cooler 8 FPI 8 FPI 8 FPI 8 FPI
* Add 30% for 10 FPI and 60% for 12 FPI
Indirect Fired Heater (IFG)
Downturn 300 350 400 600 700 800
CFM Plenum** MBH MBH MBH MBH MBH MBH
3,000 .03 .13 .11 NA NA NA NA
3,400 .05 .14 .12 .10 NA NA NA
3,800 .06 .15 .13 .11 .30 NA NA
4,200 .08 .16 .14 .12 .32 NA NA
4,600 .10 .19 .15 .13 .38 .30 NA
** Only on IFG units with downturn plenum - do not include on end discharge units
Accessory Pressure Loss Data (inches of water)
Housing
V-bank Filters Filters in Intake Hood Aluminum Mesh Fiberglass Throwaway Pleated Aluminum Mesh CFM 1" 2" 1" 2" 1" 2" 1" 2" 4,000 .04 .06 .05 .07 .05 .07 .05. 5,000 .05 .07 .06 .09 .06 .09 .07. 6,000 .06 .09 .07 .10 .07 .10 .09. 7,000 .07 .10 .08 .12 .08 .12 .10. 8,000 .08 .11 .10 .13 .10 .13 .12. 9,000 .09 .12 .11 .15 .11 .15 .14. 10,000 .10 .13 .12 .16 .12 .16 .16. 11,000 .11 .14 .13 .18 .13 .18 .18. 12,000 .12 .16 .14 .20 .14 .20 .19. 13,000 .13 .17 .15 .21 .15 .21 .21. 14,000 .14 .18 .16 .23 .16 .23 .23. 15,000 .14 .19 .17 .24 .17 .24 .25.
Heating or Cooling Coils* Intake OA or RA DFG Electric Evap 1 Row 2 Rows 4 Rows 6 Rows CFM Hood Damper Heater Heater Cooler 8 FPI 8 FPI 8 FPI 8 FPI 4,000 .02 .03 .50 .02 .01 .06 .13 .26. 5,000 .03 .03 .50 .02 .04 .08 .16 .32. 6,000 .05 .04 .50 .03 .08 .10 .19 .39. 7,000 .06 .05 .50 .04 .11 .11 .23 .45. 8,000 .07 .05 .50 .04 .15 .13 .26 .52. 9,000 .09 .06 .50 .05 .18 .15 .29 .58. 10,000 .10 .06 .50 .05 .22 .16 .32 .65. 11,000 .11 .07 .50 .06 .25 .18 .36 .71 1. 12,000 .13 .08 .50 .07 .29 .19 .39 .78 1. 13,000 .14 .08 .50 .07 .32 .21 .42 .84 1. 14,000 .15 .09 .50 .08 .36 .23 .45 .91 1. 15,000 .16 .10 .50 .09 .39 .24 .49 .97 1.
- Add 30% for 10 FPI and 60% for 12 FPI
Indirect Fired Heater (IFG) Downturn 300 350 400 600 700 800 900 1050 1200 CFM Plenum** MBH MBH MBH MBH MBH MBH MBH MBH MBH 4,000 .02 .14 .11 .10 .28 NA NA .42 NA NA 5,000 .05 .22 .17 .13 .44 .34 .26 .66 .51. 6,000 .08 .32 .24 .18 .64 .48 .36 .96 .72. 7,000 .10 .43 .32 .25 .86 .64 .50 1.29 .96. 8,000 .13 .57 .42 .33 1.14 .84 .66 1.71 1.26. 9,000 .15 .73 .54 .41 1.46 1.08 .82 2.19 1.62 1. 10,000 .18 .90 .67 .51 1.80 1.34 1.02 2.70 2.01 1. 11,000 .21 1.08 .82 .62 2.16 1.64 1.24 3.24 2.46 1. 12,000 .23 NA .97 .75 NA 1.94 1.50 NA 2.91 2. 13,000 .26 NA 1.12 .88 NA 2.24 1.76 NA 3.36 2. 14,000 .28 NA NA 1.01 NA NA 2.02 NA NA 3. 15,000 .31 NA NA NA NA NA NA NA NA NA ** Only on IFG units with downturn plenum - do not include on end discharge units
9" Light Duty Blower
9" Blower
10" Blower
Note: See page 15 for General Notes regarding these Performance Tables.
O.V.
CFM
Available Models CFM
Available Models CFM
Available
10" Blower
12" Blower
15" Blower
O.V.
Available Models
CFM O.V.
Available
Performance Tables - Housing Size #
15" Blower
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
DFG-115 3,400 1,630 456 0.52 560 0.69 653 0.86 736 1.
MUA-115 3,800 1,830 483 0.66 580 0.85 668 1.04 748 1.23 822 1.
IFG-115 4,200 2,020 512 0.83 603 1.04 685 1.25 762 1.45 834 1.67 902 1.90 962 2.
300 MBH 4,600 2,210 543 1.03 628 1.26 705 1.48 778 1.71 848 1.94 914 2.17 974 2.42 1030 2.
350 MBH 5,000 2,400 575 1.27 655 1.51 729 1.75 798 2.00 864 2.25 927 2.50 988 2.75 1043 3.
400 MBH 5,400 2,600 609 1.54 684 1.80 754 2.06 820 2.34 883 2.61 944 2.87 1002 3.13 1058 3.
600 MBH 5,800 2,790 644 1.86 714 2.13 781 2.41 844 2.70 904 3.00 962 3.28 1018 3.57 1073 3.
700 MBH 6,200 2,980 680 2.23 744 2.50 808 2.80 869 3.11 927 3.42 982 3.73 1035 4.04 1088 4.
800 MBH 6,600 3,170 716 2.64 775 2.92 836 3.23 894 3.56 950 3.89 1003 4.22 1054 4.54 1104 4.
18" Blower
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
DFG-118 4,000 1,380 318 0.49 409 0.
MUA-118 4,400 1,520 331 0.61 416 0.81 496 1.
NTS-118 4,800 1,660 343 0.73 425 0.96 499 1.
IFG-118 5,200 1,790 356 0.86 435 1.12 505 1.36 572 1.
300 MBH 5,600 1,930 370 1.02 446 1.30 513 1.56 576 1.84 638 2.
350 MBH 6,000 2,070 385 1.19 458 1.50 522 1.78 583 2.07 641 2.36 697 2.
400 MBH 6,400 2,210 401 1.39 471 1.73 533 2.03 591 2.33 647 2.64 701 2.
600 MBH 6,800 2,340 417 1.61 484 1.97 545 2.31 600 2.62 653 2.94 705 3.27 757 3.
700 MBH 7,200 2,480 434 1.85 498 2.25 557 2.61 611 2.94 661 3.27 711 3.61 760 3.97 808 4.
800 MBH 7,600 2,620 451 2.13 512 2.54 570 2.93 622 3.29 671 3.64 718 3.99 766 4.36 811 4.
900 MBH 8,000 2,760 469 2.43 527 2.86 583 3.28 634 3.67 681 4.04 727 4.40 772 4.78 817 5.
1050 MBH 8,400 2,900 487 2.76 542 3.21 597 3.66 647 4.08 693 4.47 737 4.85 781 5.24 823 5.
1200 MBH 8,800 3,030 504 3.12 558 3.59 610 4.06 659 4.51 705 4.94 748 5.34 790 5.73 831 6.
20" Blower
RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
DFG-120 5,000 1,280 308 0.67 386 0.92 455 1.22 517 1.
MUA-120 5,500 1,410 326 0.83 398 1.10 464 1.41 523 1.
NTS-120 6,000 1,530 344 1.02 410 1.31 473 1.62 531 1.97 583 2.
IFG-120 6,500 1,660 362 1.23 423 1.54 483 1.87 539 2.23 590 2.61 638 3.
300 MBH 7,000 1,790 380 1.48 437 1.80 494 2.14 548 2.51 598 2.91 645 3.33 690 3.78 733 4.
350 MBH 7,500 1,920 399 1.75 453 2.10 506 2.45 558 2.84 607 3.25 653 3.68 696 4.14 737 4.
400 MBH 8,000 2,050 417 2.06 469 2.43 519 2.80 568 3.20 616 3.62 661 4.07 703 4.53 743 5.
600 MBH 8,500 2,170 436 2.40 486 2.80 533 3.20 580 3.60 626 4.04 669 4.50 711 4.97 750 5.
700 MBH 9,000 2,300 455 2.78 503 3.22 548 3.63 593 4.05 637 4.50 679 4.97 719 5.45 758 5.
800 MBH 9,500 2,430 474 3.20 522 3.68 564 4.11 606 4.54 648 5.01 689 5.49 729 5.98 767 6.
900 MBH 10,000 2,560 494 3.67 540 4.18 581 4.63 621 5.09 661 5.56 701 6.06 739 6.57 776 7.
1050 MBH 10,500 2,690 513 4.18 559 4.72 598 5.20 636 5.68 674 6.17 713 6.68 750 7.20 786 7.
1200 MBH 11,000 2,810 533 4.73 578 5.32 616 5.82 652 6.32 689 6.83 725 7.36 762 7.90 797 8.
Note: See page 15 for General Notes regarding these Performance Tables.
Total Static Pressure (in. w.g.)
Available Models
CFM
Available Models
CFM
Available Models CFM
O.V.
O.V.
Total Static Pressure (in. w.g.)
O.V.
Total Static Pressure (in. w.g.)
Note: This is a non-standard combination of blower and housing size. Use it only if a 15" blower is required but the standard Housing Size # is too small. This may occur when a cooling coil is required.
Performance Tables - Housing Size #3 (Con't.)
20" Heavy Duty Blower
Twin 15" Blowers
Total Static Pressure (in. w.g.)
Available Models CFM^ O.V. Available
- Housing #
- 8,000 .04 .06 .05 .07 .05 .07 .05. CFM 1" 2" 1" 2" 1" 2" 1" 2"
- 10,000 .05 .08 .06 .09 .06 .09 .07.
- 12,000 .06 .09 .08 .10 .08 .10 .09.
- 14,000 .07 .10 .09 .12 .09 .12 .11.
- 16,000 .08 .11 .10 .13 .10 .13 .12.
- 18,000 .09 .12 .11 .15 .11 .15 .14.
- 20,000 .10 .13 .12 .17 .12 .17 .16.
- 22,000 .11 .15 .13 .18 .13 .18 .18.
- 24,000 .12 .16 .14 .20 .14 .20 .20.
- 26,000 .13 .17 .15 .21 .15 .21 .22.
- 28,000 .14 .18 .16 .23 .16 .23 .23.
- 30,000 .15 .19 .17 .25 .17 .25 .25.
- 8,000 .02 .03 .50 .02 .01 .07 .13 .26. CFM Hood Damper Heater Heater Cooler 8 FPI 8 FPI 8 FPI 8 FPI
- 10,000 .04 .03 .50 .02 .05 .08 .17 .33.
- 12,000 .05 .04 .50 .03 .08 .10 .20 .40.
- 14,000 .06 .05 .50 .04 .12 .12 .23 .46.
- 16,000 .08 .05 .50 .04 .15 .13 .26 .53.
- 18,000 .09 .06 .50 .05 .19 .15 .30 .59.
- 20,000 .10 .07 .50 .06 .22 .17 .33 .66.
- 22,000 .12 .07 .50 .06 .26 .18 .36 .73 1.
- 24,000 .13 .08 .50 .07 .30 .20 .40 .79 1.
- 26,000 .14 .09 .50 .08 .33 .21 .43 .86 1.
- 28,000 .15 .09 .50 .08 .37 .23 .46 .92 1.
- 30,000 .17 .10 .50 .09 .40 .25 .50 .99 1.
- Performance Tables - Housing Size #
- DFG-109-SM 600 1,180 773 0.13 906 0.16 1003 0.21 1094 0.24 1188 0.27 1280 0. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- MUA-109-SM 700 1,370 844 0.18 986 0.23 1083 0.27 1163 0.31 1241 0.35 1320 0.39 1399 0.44 1479 0.
- NTS-109-SM 800 1,570 913 0.24 1060 0.31 1162 0.35 1243 0.39 1314 0.44 1383 0.48 1453 0.53 1522 0.
- IFG-109-SM 900 1,760 983 0.32 1130 0.39 1239 0.45 1323 0.50 1394 0.55 1457 0.59 1519 0.64 1580 0.
- 100 MBH 1,000 1,960 1054 0.40 1198 0.50 1311 0.56 1401 0.62 1475 0.67 1538 0.73 1595 0.78 1651 0.
- 150 MBH 1,100 2,160 1127 0.51 1268 0.61 1382 0.69 1475 0.76 1553 0.82 1619 0.88 1677 0.94 1730 1.
- 1,200 2,350 1201 0.62 1338 0.74 1451 0.84 1546 0.92 1627 1.00 1697 1.06 1759 1.13 1813 1.
- 1,300 2,550 1279 0.76 1409 0.89 1520 1.01 1616 1.10 1699 1.19 1773 1.26 1838 1.33 1895 1.
- 1,400 2,750 1358 0.92 1481 1.06 1590 1.19 1686 1.30 1770 1.40 1844 1.49 1912 1.57 1972 1.
- 1,500 2,940 1438 1.10 1553 1.25 1661 1.39 1756 1.52 1840 1.63 1914 1.74 1983 1.83 2046 1.
- 1,600 3,140 1517 1.30 1627 1.46 1730 1.62 1824 1.76 1909 1.89 1985 2.01 2054 2.12 2118 2.
- DFG-109 1,000 1,140 565 0.14 769 0. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- MUA-109 1,100 1,250 578 0.16 772 0.
- NTS-109 1,200 1,360 595 0.18 778 0.26 943 0.
- IFG-109 1,300 1,480 615 0.22 786 0.30 943 0.
- 100 MBH 1,400 1,590 638 0.25 796 0.34 947 0.44 1089 0.
- 150 MBH 1,500 1,700 663 0.29 808 0.38 953 0.48 1087 0.59 1214 0.
- 200 MBH 1,600 1,820 690 0.34 823 0.43 962 0.54 1090 0.64 1216 0.
- 250 MBH 1,700 1,930 719 0.39 840 0.49 972 0.59 1097 0.71 1213 0.82 1330 0.
- 1,800 2,050 748 0.45 860 0.55 985 0.66 1106 0.77 1219 0.89 1331 1.
- 1,900 2,160 779 0.52 881 0.61 998 0.73 1116 0.85 1228 0.97 1333 1.10 1440 1.
- 2,000 2,270 811 0.59 905 0.68 1014 0.80 1128 0.93 1237 1.06 1340 1.19 1442 1.
- 2,100 2,390 843 0.67 930 0.76 1032 0.88 1140 1.02 1247 1.15 1346 1.28 1443 1.43 1537 1.
- 2,200 2,500 875 0.75 957 0.85 1052 0.97 1154 1.11 1256 1.25 1354 1.38 1447 1.52 1540 1.
- 2,300 2,610 908 0.84 985 0.94 1074 1.06 1169 1.20 1267 1.35 1363 1.49 1454 1.63 1545 1.
- 2,400 2,730 941 0.94 1015 1.05 1096 1.16 1187 1.31 1282 1.46 1375 1.61 1464 1.76 1551 1.
- 2,500 2,840 975 1.05 1046 1.16 1121 1.28 1206 1.42 1298 1.58 1390 1.74 1475 1.89 1558 2.
- 2,600 2,950 1009 1.18 1075 1.28 1148 1.41 1227 1.55 1312 1.70 1400 1.86 1486 2.03 1569 2.
- DFG-110 1,200 1,130 504 0.15 676 0. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- MUA-110 1,300 1,230 515 0.17 681 0.
- NTS-110 1,400 1,320 527 0.20 688 0.29 827 0.
- IFG-110 1,500 1,420 540 0.23 696 0.33 831 0.
- 100 MBH 1,600 1,510 554 0.26 706 0.36 836 0.48 955 0.
- 150 MBH 1,700 1,600 570 0.29 716 0.40 843 0.52 959 0.
- 200 MBH 1,800 1,700 586 0.33 727 0.44 851 0.57 964 0.70 1068 0.
- 250 MBH 1,900 1,790 602 0.37 739 0.49 860 0.62 970 0.75 1074 0.90 1068 0.
- 2,000 1,890 619 0.42 752 0.54 870 0.67 978 0.81 1079 0.96 1174 1.
- 2,100 1,980 637 0.46 765 0.60 880 0.73 986 0.87 1086 1.03 1177 1.18 1266 1.
- 2,200 2,080 655 0.52 779 0.66 891 0.79 995 0.94 1092 1.09 1182 1.25 1268 1.
- 2,300 2,170 674 0.57 793 0.72 902 0.86 1004 1.01 1099 1.16 1188 1.33 1274 1.50 1354 1.
- 2,400 2,260 693 0.63 807 0.78 915 0.93 1014 1.08 1107 1.24 1195 1.41 1279 1.59 1358 1.
- 2,500 2,360 712 0.70 822 0.86 927 1.01 1024 1.16 1115 1.32 1202 1.50 1284 1.68 1361 1.
- 2,600 2,450 732 0.76 838 0.93 940 1.09 1035 1.25 1125 1.41 1210 1.59 1290 1.77 1367 1.
- 2,700 2,550 752 0.84 854 1.01 953 1.18 1047 1.34 1135 1.51 1218 1.69 1297 1.87 1374 2.
- 2,800 2,640 772 0.92 871 1.10 967 1.27 1059 1.44 1145 1.61 1227 1.79 1305 1.98 1381 2.
- 2,900 2,740 793 1.00 888 1.19 982 1.37 1071 1.55 1156 1.72 1237 1.90 1314 2.09 1389 2.
- 3,000 2,830 814 1.09 906 1.28 997 1.47 1084 1.66 1168 1.84 1247 2.02 1323 2.21 1397 2.
- 3,100 2,920 834 1.19 924 1.38 1013 1.58 1098 1.77 1180 1.96 1258 2.14 1333 2.34 1405 2.
- 3,200 3,020 856 1.29 942 1.49 1029 1.69 1112 1.89 1193 2.08 1269 2.28 1343 2.48 1414 2.
- 3,300 3,110 877 1.40 961 1.60 1045 1.81 1127 2.02 1206 2.22 1281 2.41 1353 2.62 1423 2.
- 3,400 3,210 898 1.52 980 1.72 1062 1.94 1142 2.15 1219 2.36 1293 2.56 1364 2.77 1433 2.
- 3,500 3,300 920 1.63 999 1.85 1079 2.07 1157 2.29 1233 2.50 1305 2.71 1375 2.92 1443 3.
- 3,600 3,400 942 1.76 1018 1.98 1095 2.20 1172 2.43 1246 2.66 1317 2.87 1387 3.08 1454 3. - 0. O.V.
- O.V. 0. Total Static Pressure (in. w.g.) - 1.75 2. - 1.50 1. - 1. - 0.50 0.75 1.00 2. - 1. Total Static Pressure (in. w.g.)
- 0.25 0.75 1.00 1.25 1.
- 0.25 0.50 0.75 1.00 1.25 1.50 2. Total Static Pressure (in. w.g.)
- Performance Tables - Housing Size #
- DFG-110 1,200 1,130 495 0.15 669 0. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- MUA-110 1,400 1,320 520 0.20 681 0.29 821 0.
- IFG-110 1,600 1,510 544 0.25 695 0.36 827 0.48 945 0.
- 200 MBH 1,800 1,700 570 0.32 713 0.44 838 0.56 953 0.68 1059 0.
- 250 MBH 2,000 1,890 600 0.40 734 0.53 854 0.65 964 0.79 1064 0.93 1159 1.
- 300 MBH 2,200 2,080 634 0.49 758 0.63 873 0.77 978 0.91 1075 1.06 1167 1.23 1254 1. - 2,400 2,260 670 0.60 786 0.76 894 0.90 995 1.05 1089 1.21 1178 1.38 1262 1.56 1343 1. - 2,600 2,450 709 0.73 816 0.90 918 1.06 1014 1.21 1105 1.37 1191 1.55 1273 1.74 1352 1. - 2,800 2,640 749 0.88 848 1.06 944 1.23 1036 1.40 1123 1.57 1207 1.75 1287 1.94 1363 2. - 3,000 2,830 789 1.05 881 1.23 972 1.42 1060 1.60 1144 1.78 1225 1.97 1303 2.16 1376 2. - 3,200 3,020 829 1.23 915 1.43 1002 1.63 1086 1.83 1167 2.02 1245 2.22 1320 2.41 1392 2. - 3,400 3,210 869 1.44 950 1.64 1032 1.86 1113 2.08 1192 2.28 1267 2.49 1339 2.69 1409 2. - 3,600 3,400 912 1.67 987 1.89 1064 2.11 1141 2.34 1216 2.56 1289 2.78 1359 3.00 1427 3.
- DFG-112 1,800 1,220 444 0.22 593 0.33 719 0. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- MUA-112 2,000 1,350 461 0.27 603 0.39 724 0.
- NTS-112 2,200 1,490 478 0.33 613 0.45 730 0.58 836 0.
- IFG-112 2,400 1,620 497 0.40 624 0.52 737 0.66 837 0.80 931 0.
- 200 MBH 2,600 1,760 518 0.48 636 0.60 746 0.75 843 0.90 935 1.
- 250 MBH 2,800 1,890 541 0.57 650 0.70 755 0.85 851 1.01 941 1.17 1024 1.
- 300 MBH 3,000 2,030 566 0.67 666 0.81 767 0.97 861 1.13 948 1.31 1029 1.48 1106 1.66 1179 1.
- 500 MBH 3,200 2,160 593 0.79 683 0.93 780 1.09 871 1.27 956 1.45 1034 1.64 1110 1.83 1183 2.
- 600 MBH 3,400 2,300 621 0.92 703 1.07 794 1.23 883 1.41 965 1.61 1042 1.80 1116 2.00 1187 2. - 3,600 2,430 649 1.07 724 1.22 809 1.38 894 1.57 975 1.77 1051 1.98 1123 2.18 1192 2. - 3,800 2,570 679 1.23 747 1.39 826 1.56 907 1.75 985 1.95 1060 2.17 1130 2.38 1198 2. - 4,000 2,700 708 1.40 771 1.58 844 1.75 921 1.94 997 2.15 1069 2.37 1138 2.59 1205 2. - 4,200 2,840 738 1.60 796 1.78 864 1.96 937 2.15 1010 2.36 1080 2.59 1148 2.82 1214 3. - 4,400 2,970 768 1.81 822 2.00 885 2.19 954 2.38 1024 2.59 1093 2.82 1159 3.07 1224 3. - 4,600 3,110 798 2.04 848 2.24 907 2.44 973 2.64 1041 2.85 1107 3.08 1172 3.34 1235 3. - 4,800 3,240 829 2.29 876 2.50 931 2.71 993 2.92 1058 3.14 1123 3.37 1186 3.62 1247 3. - 5,000 3,380 861 2.57 905 2.78 956 3.00 1014 3.22 1075 3.44 1137 3.67 1199 3.92 1258 4.
- DFG-115 3,000 1,440 439 0.41 550 0.56 646 0.72 730 0. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- MUA-115 3,200 1,540 453 0.47 559 0.63 654 0.79 737 0.
- NTS-115 3,400 1,630 468 0.53 569 0.71 662 0.88 744 1.
- IFG-115 3,600 1,730 483 0.61 581 0.79 671 0.97 751 1.16 824 1.
- 200 MBH 3,800 1,830 498 0.69 593 0.88 680 1.06 759 1.26 832 1.
- 250 MBH 4,000 1,920 514 0.77 605 0.97 689 1.17 767 1.38 839 1.59 904 1.81 967 2.
- 300 MBH 4,200 2,020 529 0.86 618 1.07 699 1.28 776 1.49 847 1.71 912 1.94 972 2.
- 500 MBH 4,400 2,120 545 0.96 631 1.18 710 1.40 785 1.62 855 1.85 919 2.07 978 2.
- 600 MBH 4,600 2,210 561 1.07 645 1.30 721 1.53 794 1.76 863 1.99 927 2.23 986 2.48 1041 2. - 4,800 2,310 577 1.19 659 1.42 733 1.67 804 1.91 871 2.14 934 2.39 993 2.64 1048 2. - 5,000 2,400 594 1.32 673 1.56 745 1.81 814 2.06 880 2.31 942 2.56 1001 2.81 1056 3. - 5,200 2,500 611 1.46 688 1.71 758 1.97 825 2.23 889 2.49 951 2.74 1009 3.00 1064 3. - 5,400 2,600 628 1.61 703 1.86 772 2.13 837 2.41 899 2.68 960 2.94 1018 3.20 1073 3. - 5,600 2,690 646 1.77 718 2.03 786 2.31 849 2.59 910 2.87 969 3.15 1026 3.42 1081 3. - 5,800 2,790 665 1.94 735 2.21 801 2.50 863 2.79 922 3.08 979 3.37 1036 3.65 1089 3. - 6,000 2,880 683 2.13 751 2.40 816 2.70 877 3.00 934 3.30 990 3.60 1045 3.89 1098 4. - 6,500 3,130 731 2.64 794 2.93 855 3.25 913 3.58 968 3.90 1020 4.23 1072 4.55 1122 4. - 7,000 3,370 777 3.23 834 3.54 892 3.88 947 4.22 1000 4.57 1050 4.92 1099 5.27 1147 5.
- Note: This is a non-standard combination of blower and housing size. Use it only if a 10" blower is required but the standard Housing Size # Note: See page 15 for General Notes regarding these Performance Tables. - 0.50 1.00 1. is too small. This may occur when a cooling coil is required. - 1.75 2. - 0. Total Static Pressure (in. w.g.) - 0.75 1. - 1. - Available 1.25 1. Total Static Pressure (in. w.g.) - 1. Models CFM - 1.75 2. Models CFM - 0.25 0.50 0.75 1.25 1. O.V. - 0.25 0. Total Static Pressure (in. w.g.) - 0.75 1.75 2.
- IFG-209-SM 1,200 1,180 773 0.25 907 0.32 1002 0.38 1095 0.45 1187 0.53 1280 0. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- 300 MBH 1,400 1,370 844 0.35 986 0.44 1083 0.52 1163 0.59 1241 0.67 1320 0.75 1399 0.84 1479 0.
- 350 MBH 1,600 1,570 913 0.47 1060 0.59 1162 0.67 1243 0.76 1314 0.85 1383 0.93 1453 1.02 1522 1.
- 400 MBH 1,800 1,760 983 0.61 1130 0.76 1239 0.87 1323 0.96 1394 1.06 1457 1.15 1519 1.25 1580 1.
- 2,000 1,960 1054 0.78 1198 0.96 1311 1.09 1401 1.20 1475 1.31 1538 1.42 1595 1.52 1651 1.
- 2,200 2,160 1127 0.98 1268 1.18 1382 1.35 1475 1.49 1553 1.61 1619 1.73 1677 1.84 1730 1.
- 2,400 2,350 1201 1.21 1338 1.44 1451 1.64 1546 1.81 1627 1.95 1697 2.08 1759 2.21 1813 2.
- 2,600 2,550 1279 1.48 1409 1.74 1520 1.97 1616 2.16 1699 2.33 1773 2.47 1838 2.62 1895 2.
- 2,800 2,750 1358 1.80 1481 2.07 1590 2.33 1686 2.55 1770 2.75 1844 2.92 1912 3.08 1972 3.
- 3,000 2,940 1438 2.16 1553 2.45 1661 2.73 1756 2.98 1840 3.21 1914 3.42 1983 3.59 2046 3.
- 3,200 3,140 1517 2.56 1627 2.88 1730 3.18 1824 3.47 1909 3.73 1985 3.97 2054 4.17 2118 4.
- IFG-209 2,000 1,140 574 0.25 777 0. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- 300 MBH 2,200 1,250 590 0.30 783 0.
- 350 MBH 2,400 1,360 609 0.36 790 0.
- 400 MBH 2,600 1,480 629 0.42 800 0.59 954 0.
- 600 MBH 2,800 1,590 652 0.50 811 0.67 959 0.
- 700 MBH 3,000 1,700 677 0.58 824 0.76 968 0.96 1102 1.
- 800 MBH 3,200 1,820 704 0.67 840 0.86 979 1.07 1107 1.27 1231 1.
- 3,400 1,930 733 0.78 858 0.97 991 1.18 1113 1.40 1233 1.
- 3,600 2,050 763 0.90 878 1.09 1004 1.31 1123 1.55 1238 1.78 1349 2.
- 3,800 2,160 794 1.03 900 1.22 1018 1.45 1135 1.70 1245 1.94 1351 2.
- 4,000 2,270 826 1.18 923 1.36 1034 1.60 1146 1.86 1254 2.11 1356 2.37 1458 2.
- 4,200 2,390 859 1.34 949 1.53 1052 1.77 1159 2.03 1264 2.30 1363 2.56 1460 2.
- 4,400 2,500 891 1.51 976 1.70 1071 1.95 1173 2.22 1275 2.50 1372 2.77 1465 3.05 1559 3.
- 4,600 2,610 924 1.69 1004 1.90 1093 2.14 1190 2.42 1289 2.71 1384 3.00 1474 3.28 1565 3.
- 4,800 2,730 957 1.90 1033 2.12 1117 2.36 1209 2.64 1305 2.94 1397 3.25 1485 3.53 1572 3.
- 5,000 2,840 991 2.12 1064 2.35 1143 2.59 1230 2.87 1322 3.18 1412 3.50 1498 3.81 1580 4.
- 5,200 2,950 1027 2.36 1096 2.59 1169 2.84 1251 3.12 1337 3.43 1425 3.77 1510 4.10 1592 4.
- IFG-210 3,000 1,420 551 0.45 705 0.65 839 0. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- 300 MBH 3,200 1,510 562 0.51 712 0.71 843 0.
- 350 MBH 3,400 1,600 576 0.58 722 0.78 849 1.
- 400 MBH 3,600 1,700 592 0.65 733 0.87 857 1.11 969 1.
- 600 MBH 3,800 1,790 609 0.73 745 0.96 866 1.21 976 1.
- 700 MBH 4,000 1,890 628 0.82 759 1.07 876 1.32 984 1.59 1083 1.
- 800 MBH 4,200 1,980 647 0.92 773 1.18 888 1.43 993 1.72 1092 2.
- 4,400 2,080 666 1.02 788 1.30 900 1.56 1002 1.85 1100 2.
- 4,600 2,170 685 1.14 803 1.43 912 1.70 1013 1.99 1108 2.32 1196 2.
- 4,800 2,260 705 1.26 819 1.56 925 1.85 1024 2.15 1115 2.47 1202 2.
- 5,000 2,360 725 1.39 835 1.71 939 2.01 1035 2.31 1124 2.64 1210 2.98 1292 3.
- 5,200 2,450 744 1.53 851 1.86 953 2.17 1046 2.49 1134 2.82 1219 3.17 1299 3.
- 5,400 2,550 765 1.68 868 2.02 967 2.35 1059 2.68 1145 3.01 1229 3.37 1307 3.
- 5,600 2,640 785 1.84 885 2.19 981 2.54 1071 2.88 1157 3.22 1239 3.58 1317 3.96 1393 4.
- 5,800 2,740 806 2.01 903 2.38 996 2.74 1085 3.09 1169 3.44 1249 3.80 1327 4.19 1402 4.
- 6,000 2,830 827 2.20 920 2.57 1011 2.95 1098 3.31 1181 3.67 1260 4.04 1336 4.43 1408 4.
- 6,500 3,070 882 2.71 968 3.11 1052 3.52 1134 3.92 1213 4.31 1289 4.70 1361 5.
- 7,000 3,300 939 3.31 1018 3.74 1097 4.18 1175 4.61 1249 5. - 2. Note: See page 15 for General Notes regarding these Performance Tables. - 2. - 1. - 0.75 1. - 2. - 0.75 1.50 1. O.V. - 1.50 1. - 0. Total Static Pressure (in. w.g.) - 1.00 1.25 1. Total Static Pressure (in. w.g.)
- 0.25 0.50 0.75 1.
- 0.25 0. Total Static Pressure (in. w.g.)
- 1. Models CFM - 1.
- DFG-120-HD 5,000 1,180 293 0.57 373 0.84 450 1. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- MUA-120-HD 5,500 1,290 307 0.70 382 0.98 453 1.31 520 1.
- NTS-120-HD 6,000 1,410 321 0.85 392 1.14 458 1.48 522 1.86 582 2.
- IFG-120-HD 6,500 1,530 336 1.02 403 1.32 465 1.67 525 2.06 583 2.50 637 2.
- 300 MBH 7,000 1,650 351 1.21 415 1.53 474 1.89 530 2.29 586 2.73 639 3.21 689 3.
- 350 MBH 7,500 1,760 367 1.43 427 1.77 483 2.13 537 2.54 589 2.99 641 3.48 690 3.
- 400 MBH 8,000 1,880 383 1.67 441 2.03 494 2.41 545 2.82 595 3.28 644 3.77 692 4.29 737 4.
- 600 MBH 8,500 2,000 399 1.95 455 2.33 505 2.72 554 3.14 602 3.60 648 4.09 694 4.62 739 5.
- 700 MBH 9,000 2,120 416 2.25 469 2.65 518 3.06 564 3.49 610 3.96 654 4.46 698 4.99 741 5.
- 800 MBH 9,500 2,240 433 2.59 484 3.01 531 3.44 576 3.88 619 4.36 661 4.86 703 5.40 745 5.
- 900 MBH 10,000 2,350 450 2.96 499 3.41 545 3.85 588 4.31 630 4.79 670 5.31 710 5.85 750 6.
- 1050 MBH 10,500 2,470 468 3.37 515 3.85 559 4.30 601 4.78 641 5.27 680 5.80 718 6.35 757 6.
- 1200 MBH 11,000 2,590 486 3.81 531 4.32 574 4.80 614 5.29 653 5.80 691 6.33 728 6.89 765 7.
- 11,500 2,710 504 4.30 548 4.83 589 5.33 628 5.84 666 6.36 702 6.91 738 7.48 773 8.
- 12,000 2,820 522 4.82 564 5.39 604 5.91 642 6.43 679 6.97 715 7.54 749 8.12 783 8.
- 12,500 2,940 540 5.39 581 5.98 620 6.53 657 7.07 693 7.63 727 8.21 761 8.80 793 9.
- 13,000 3,060 558 6.00 598 6.62 635 7.20 671 7.76 706 8.33 740 8.92 773 9.53 804 10.
- 13,500 3,180 577 6.65 615 7.31 651 7.91 686 8.49 720 9.08 753 9.68 785 10.31 816 10.
- 14,000 3,290 595 7.36 632 8.04 667 8.67 701 9.28 734 9.88 767 10.50 798 11.14 828 11.
- 14,500 3,410 614 8.11 650 8.83 684 9.48 717 10.11 749 10.74 780 11.37 811 12.02 841 12.
- 15,000 3,530 633 8.92 668 9.66 701 10.35 733 11.01 764 11.66 795 12.31 825 12.97 854 13.
- Performance Tables - Housing Size #
- DFG-215 6,000 1,440 430 0.76 540 1.06 638 1.38 722 1. RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP
- MUA-215 6,400 1,540 441 0.87 548 1.19 644 1.52 728 1.88 805 2. - 6,800 1,630 454 0.99 558 1.33 651 1.67 734 2.03 809 2. - 7,200 1,730 467 1.12 568 1.48 658 1.84 740 2.21 814 2.62 883 3. - 7,600 1,830 482 1.27 579 1.65 667 2.03 747 2.41 820 2.82 888 3.27 953 3. - 8,000 1,920 496 1.43 591 1.84 675 2.22 754 2.62 826 3.04 894 3.49 957 3.97 1020 4. - 8,400 2,020 512 1.61 603 2.03 685 2.44 762 2.85 833 3.28 900 3.73 962 4.22 1022 4. - 8,800 2,120 527 1.80 615 2.24 695 2.67 770 3.10 841 3.54 907 4.00 968 4.49 1026 5. - 9,200 2,210 543 2.01 628 2.46 706 2.92 779 3.36 849 3.82 914 4.28 974 4.78 1031 5. - 9,600 2,310 559 2.24 642 2.70 717 3.18 789 3.65 857 4.12 921 4.59 981 5.09 1036 5. - 10,000 2,400 575 2.49 655 2.96 729 3.46 799 3.95 865 4.44 928 4.93 988 5.43 1043 5. - 10,400 2,500 592 2.75 669 3.24 741 3.75 809 4.27 874 4.78 936 5.29 995 5.80 1050 6. - 10,800 2,600 609 3.04 684 3.53 754 4.07 820 4.61 883 5.14 944 5.67 1003 6.20 1058 6. - 11,200 2,690 626 3.34 698 3.85 767 4.40 832 4.96 893 5.53 952 6.08 1010 6.62 1066 7. - 11,600 2,790 644 3.67 713 4.19 780 4.76 844 5.34 904 5.92 961 6.50 1018 7.06 1074 7. - 12,000 2,880 662 4.02 728 4.55 794 5.13 856 5.73 915 6.34 971 6.94 1027 7.52 1081 8. - 13,000 3,130 707 5.00 767 5.55 829 6.17 888 6.81 945 7.46 998 8.11 1049 8.75 1100 9. - 14,000 3,370 752 6.14 806 6.70 864 7.36 921 8.04 975 8.72 1026 9. - 0.25 0.50 0.75 1.00 1.25 1.75 2. Note: See page 15 for General Notes regarding these Performance Tables.
- Note: This is a non-standard blower. Use it only if Housing Size #3 is too small and the standard twin 18" blowers that are in Housing Size # Models CFM O.V. - 1. can not meet the fan performance requirements. This may occur when a cooling coil is required. - 1.25 1.50 1.75 2. - 0.25 0.50 0.75 1. Total Static Pressure (in. w.g.)
FSG 04/
Examples
Direct Fired Gas Heater
10,000 CFM at 0.75” ESP
Design Temperature Rise = 70°F
V-bank filters (1” aluminum mesh)
Intake damper
Intake hood
Step #1 - Model DFG is required.
Step #2 - 10,000 CFM is given.
Step #3 - Housing Size #3 is chosen.
Step #4 - Use chart on page 8.
0.10” filters
0.06” damper
0.10” intake
0.50” direct fired heater
0.76” internal losses
Total static pressure = 0.75” + 0.7 6 ” = 1.5 1 ”
Step #5 - From the performance tables on pp. 13-14 it can be
seen that three blowers in housing size #3 can operate at
10,000 CFM and 1.51” TSP. The 18” blower selection is at its
limit, however. It may be chosen to save some initial cost but
only if noise is not a concern. Both 20” blowers work well. The
standard one is less expensive than the heavy duty so it will be
selected.
The 20” blower performance table shows the fan will operate at
approximately 701 RPM and 6.06 BHP.
Step #7 - 7-½ HP motor is required.
Indirect Fired Gas Heater
2,700 CFM at 0.63” ESP
Design Temperature Rise = 40°F
Intake hood with flat filters (2” mesh)
Downturn plenum
Step #1 - Model IFG is required.
Step #2 - 2,700 CFM is given.
Step #3 - Required BTU = 2,700 x 40 x 1.08 ÷ 741 = 145,
Heater size is 145,800 ÷1,000 = 150 MBH
Housing Size #1 is chosen.
Step #4 - Use chart on page 5.
0.15” filters
0.07” intake
0.13” downturn
0.24” IFG Heater
0.59” internal losses
Total static pressure = 0.63” + 0.59” = 1.22”
Step #5 - From the performance table on page 10 it can be
seen that only the 10” blower is recommended at 2,700 CFM
and 1.22” TSP.
The 10” blower performance table shows the fan will operate at
slightly less than 1135 RPM and 1.51 BHP.
Step #7 - 1-½ HP motor is required.
Cooling Coil Only
4,500 CFM at 0.50” ESP
4 Row, 8 FPI Dx Cooling Coil
V-bank filters (1” fiberglass throw-away)
Intake damper
Intake hood
Step #1 - Model MUA is required.
Step #2 - 4,500 CFM is given.
Step #3 - Housing Size #3 is chosen based on the coil.
Step #4 - Use chart on page 8.
0.06” filters
0.03” damper
0.03” intake
0.29” Dx cooling coil
0.41” internal losses
Total static pressure = 0.50” + 0. 41 ” = 0.91”
Step #5 - From the performance tables on pp. 13-14 it can be
seen that none of the standard blowers in housing size #3 meet
the requirements. The non-standard 15” blower meets the
requirements, however.
The 15” blower performance table shows the fan will operate at
approximately 744 RPM and 1.56 BHP. These values were
interpolated since 4,500 CFM and 0.91” are in the middle of
two rows and columns in the table.
Step #7 - 2 HP motor is required.
Ventilation Only
1,200 CFM at 1.0” ESP
Intake hood with flat filters (2” mesh)
4,000 feet elevation
Step #1 - Model NTS is required.
Step #2 - 1,200 CFM is given.
Step #3 - Housing Size #1 is chosen.
Step #4 - Use chart on page 5.
0.06” filters
0.02” intake
0.08” internal losses
Total static pressure = 1.0” + 0. 08 ” = 1. 08 ”
Step #6 - Corrected TSP = 1.08” x 1.16 = 1.2 5 ”
Step #5 - From the performance table on page 10 it can be
seen that only the 9” light duty blower is recommended at
1,200 CFM and 1.25” TSP. The 9” and 1 0” blowers are both at
unstable points.
The 9” light duty blower performance table shows the fan will
operate at approximately 1627 RPM and 1.00 BHP.
Step #6 - Corrected BHP = 1.00 BHP 1.16 = 0.86 BHP.
Step #7 - 1 HP motor is required.
