Engineering Bulletin

ManualsBrandsHart & Cooley ManualsAluminum Fixed Horizontal Return Grilles (RH90 Series)20" x 20" (Wall Opening Size) White Aluminum Return Air Grille w/ 90° Fixed Blade (RH90 Series)

Engineering Data

Recommended Noise Criteria and Face Velocity Ranges are on page 6

441 & 445

442, 443 & 444 SurfAire

96AFBT/96AFBTI

659T/659TI/PFT/PFTI Series Performance

300 400 500 600

659T CFM 730 975 1220 1465

Ak 2.440 -Ps .017 .030 .047 .067

PFT CFM 820 1095 1370 1645

Ak 2.740 -Ps .028 .050 .078 .113

659-TI

w/12" collar CFM 670 890 1115 1340

Ak 2.230 -Ps .084 .147 .230 .330

w/14" collar CFM 680 905 1130 1355

Ak 2.260 -Ps .060 .105 .165 .240

w/16" collar CFM 695 930 1160 1390

Ak 2.320 -Ps .039 .068 .106 .155

PFTI

w/12" collar CFM 770 1025 1280 1535

Ak 2.320 -Ps .098 .170 .265 .380

w/14" collar CFM 775 1035 1295 1555

Ak 2.590 -Ps .076 .125 .200 .283

w/16" collar CFM 790 1050 1315 1580

Ak 2.630 -Ps .055 .094 .145 .210

Avera

e Face Velocit

Note: Tested without filters. Typical capacity is 2 CFM per

square inch of nominal filter area. Recommended face

velocity is 300-450 FPM. Velocities higher will decrease filter

performance, increase flow resistance, and possibly be of

noise concern. Velocity measured 1" from face.

250 350 450 550 650 750 850 1000 1200

CFM 50 70 90 110 130 145 165 195 235

Diameter

Ps .004 .009 .014 .021 .029 .036 .046 .065 .092

NC <20 <20 <20 <20 <20 22 26 33 36

Ak .370

441 Throw 5.5 7.0 9.5 11.0 14.0 16.0 18.0 22.0 24.0

Ak .430

445 Throw 4.0 5.0 6.5 8.0 10.0 11.0 13.0 15.0 17.0

CFM 85 120 155 190 225 260 295 350 420

Diameter

Ps .006 .011 .018 .027 .037 .050 .064 .090 .127

NC <20 <20 <20 <20 22 27 33 35 38

Ak .450

441 Throw 7.0 10.0 13.0 16.0 18.0 21.0 25.0 29.0 31.0

Ak .530

445 Throw 5.0 7.0 9.5 12.0 13.0 15.0 18.0 21.0 23.0

10"

CFM 135 190 245 300 355 410 465 545 655

Diameter

Ps .009 .018 .030 .044 .062 .082 .105 .145 .212

NC <20<20<20243134374244

Ak .530

441 Throw 9.0 12.0 16.0 20.0 24.0 27.0 30.0 32.0 34.0

Ak .620

445 Throw 6.5 9.0 11.0 14.0 17.0 19.0 21.0 23.0 24.0

12"

CFM 195 275 355 430 510 590 670 785 940

Diameter

Ps .013 .026 .044 .064 .090 .120 .155 .215 .300

NC <20 <20 26 33 38 42 44 46 48

Ak .590

441 Throw 10.0 13.0 19.0 25.0 30.0 32.0 33.0 34.0 35.0

Ak .700

445 Throw 7.5 9.0 14.0 17.0 21.0 23.0 24.0 25.0 26.0

14"

CFM 265 375 480 590 695 800 910 1070 1285

Diameter

Ps .018 .036 .059 .089 .125 .165 .210 .295 .410

NC <20 22 29 36 42 >45 >45 >45 >45

Ak .640

441 Throw 8.0 13.0 22.0 26.0 28.0 30.0 31.0 32.0 33.0

Ak .750

445 Throw 6.0 10.0 16.0 20.0 22.0 24.0 26.0 28.0 30.0

Neck Velocit

Note: The use of a balancing hood is recommended to balance the system.

NC is based on 10dB room attenuation (Re: 10

-12

watts) ASHRAE 36-72.

Terminal Velocity of 75 FPM

300 400 500 600 700

CFM 675 900 1125 1350 1575

Static Pressure

(

in W.C.

)

-0.024 -0.042 -0.065 -0.094 -0.128

Total Pressure

(

in W.C.

)

-0.018 -0.032 -0.050 -0.072 -0.098

Face Velocit

20 x 20

Ak 2.25

Note: Tested without filters. Typical capacity is 2 CFM per square inch of nominal filter

area. Recommended face velocity is 300-450 FPM. Velocities higher will decrease filter

performance, increase flow resistance, and possibly be of noise concern. Velocity

measured 1" from face.

250 350 450 550 650 750 850 1000 1200

CFM 50 70 90 110 130 145 165 195 235

Diameter

Ps .004 .009 .014 .021 .029 .036 .046 .065 .094

NC <20 <20 <20 <20 <20 23 27 31 35

Ak .430

444 Throw 3.0 3.5 4.5 6.0 7.5 8.0 9.0 11.0 12.0

Ak .430

443 Throw* 3.0/4.0 3.5/5.0 4.5/6.5 6.0/8.0 7.5/10.0 8.0/11.0 9.0/13.0 11.0/15.0 12.0/17.0

Ak .430

442 Throw 4.0 5.0 6.5 8.0 10.0 11.0 13.0 15.0 17.0

CFM 85 120 155 190 225 260 295 350 420

Diameter

Ps .006 .012 .019 .029 .040 .054 .070 .098 .140

NC <20 <20 <20 <20 21 26 31 34 37

Ak .530

444 Throw 4.0 5.0 6.5 8.0 9.5 11.0 13.0 15.0 17.0

Ak .530

443 Throw* 4.0/5.5 5.0/7.0 6.5/9.0 8.0/11.0 9.5/14.0 11.0/16.0 13.0/19.0 15.0/21.0 17.0/23.0

Ak .530

442 Throw 5.5 7.0 9.0 11.0 14.0 16.0 19.0 21.0 23.0

10"

CFM 135 190 245 300 355 410 465 545 655

Diameter

Ps .009 .017 .028 .043 .069 .078 .102 .140 .205

NC <20 <20 <20 22 29 35 38 42 46

Ak .620

444 Throw 4.0 6.0 8.0 10.0 12.0 13.0 15.0 18.0 19.0

Ak .620

443 Throw* 4.0/6.0 6.0/8.0 8.0/11.0 10.0/14.0 12.0/17.0 13.0/19.0 15.0/21.0 18.0/25.0 19.0/26.0

Ak .620

442 Throw 6.0 8.0 11.0 14.0 17.0 19.0 21.0 25.0 26.0

12"

CFM 190 245 355 450 530 590 670 785 940

Diameter

Ps .012 .024 .040 .059 .082 .110 .142 .195 .275

NC <20 <20 22 28 35 39 44 47 52

Ak .700

444 Throw 5.0 7.5 10.0 11.5 14.0 16.0 18.0 19.0 20.0

Ak .700

443 Throw* 5.0/8.5 7.5/11.0 10.0/14.0 11.5/17.0 14.0/19.0 16.0/23.0 18.0/25.0 19.0/26.0 20.0/27.0

Ak .700

442 Throw 8.5 11.0 14.0 17.0 19.0 23.0 25.0 26.0 27.0

14"

CFM 285 375 480 590 695 800 910 1070 1285

Diameter

Ps .015 .031 .050 .075 .105 .137 .177 .245 .350

NC <202127313640454853

Ak .750

444 Throw 6.0 9.0 11.0 14.0 17.0 19.0 20.0 22.0 24.0

Ak .750

443 Throw* 6.0/8.5 9.0/13.0 11.0/16.0 14.0/20.0 17.0/24.0 19.0/26.0 20.0/27.0 22.0/28.0 24.0/29.0

Ak .750

442 Throw 8.5 13.0 16.0 20.0 24.0 26.0 27.0 28.0 29.0

Note: The use of a balancing hood is recommended to balance the system.

NC is based on 10dB room attenuation (Re: 10

-12

watts) ASHRAE 36-72.

Terminal Velocity of 75 FPM

Neck Velocit

*443 throw S/L

300 400 500 600 700 800 900 1000

RE5T/RE5TI

22 x 22 CFM 942 1256 1570 1884 2198 4464 5022 5320

Ak 3.14 -Ps .006 .001 .016 .022 .031

46 x 22 CFM 2004 2672 3340 4008 4676

Ak 6.68 -Ps .006 .001 .016 .022 .031

RH45T

22 x 22 CFM 785 1045 1305 1565 1825

Ak 2.610 -Ps .015 .030 .043 .062 .084

46 x 22 CFM 1635 2180 2725 3270 3815

Ak 5.460 -Ps .006 .001 .016 .022 .031

REF5T*/REF5TI*

20 x 20 CF 771 1028 1285 1542 1799

Ak 2.57 -Ps .003 .006 .010 .014 .019

44 x 20 CFM 1674 2232 2790 3348 3906

Ak 5.58 -Ps .003 .006 .009 .013 .018

Rezzin Egg Crate

20 x 20 CFM 420 560 700 840 980

Ak 1.400 -Ps .004 .008 .013 .018 .025

RHF45T*

20 x 20 CFM 650 870 1085 1300 1520

Ak 2.170 -Ps .015 .025 .040 .060 .080

44 x 20 CFM 1430 1910 2385 2860 3340

Ak 4.770 -Ps .015 .024 .039 .058 .078

Avera

e Face Velocit

Note: Tested without filters. Typical capacity is 2 CFM per square

inch of nominal filter area. Recommended face velocity is 300-450

FPM. Velocities higher will decrease filter performance, increase

flow resistance, and possibly be of noise concern. Velocity

measured 1" from face.

RE5T/RE5TI

REF5T/REF5TI

Rezzin Egg Crate

RHF45T

RH45T

CFM 100 150 200 225 250 275 300

NC <20 <20 21 24 27 30 32

Static Pressure -.057 -.127 -.226 -.287 -.354 -.428 -.509

CFM 150 200 250 300 400 500 550

NC <20 <20 <20 <20 25 31 36

Static Pressure -.040 -.072 -.112 -.161 -.287 -.448 -.542

CFM 300 400 500 600 700 800 850

NC <20<20<2024283335

Static Pressure -.066 -.117 -.183 -.264 -.359 -.469 -.530

CFM 400 500 600 700 800 1000 1200

NC <20 <20 <20 <20 22 28 34

Static Pressure -.057 -.088 -.127 -.173 -.226 -.354 -.509

CFM 600 700 800 1000 1200 1400 1600

NC <20 <20 <20 20 24 28 34

Static Pressure -.069 -.094 -.122 -.191 -.275 -.374 -.489

CFM 800 1000 1200 1600 1800 2000 2200

NC <20 <20 <20 25 28

31 36

Static Pressure -.072 -.112 -.161 -.287 -.363 -.448 -.542

16"

Diameter

Inlet

Ak 1.240

Diameter

Inlet

Ak .730

Diameter

Inlet

Ak .795

10"

Diameter

Inlet

Ak .880

12"

Diameter

Inlet

Ak .980

14"

Diameter

Inlet

Ak 1.105

673T, 673TI, 673TPI R6

Summary of content (1 pages)

PAGE 1
Engineering Data Engineering Data 659T/659TI/PFT/PFTI Series Performance 441 & 445 Average Face Velocity 659T CFM Ak 2.440 -Ps PFT CFM Ak 2.740 -Ps 659-TI w/12" collar CFM Ak 2.230 -Ps w/14" collar CFM Ak 2.260 -Ps w/16" collar CFM Ak 2.320 -Ps PFTI w/12" collar CFM Ak 2.320 -Ps w/14" collar CFM Ak 2.590 -Ps w/16" collar CFM Ak 2.630 -Ps Neck Velocity CFM 6" Diameter Ps NC Ak .370 441 Throw Ak .430 445 Throw CFM 8" Diameter Ps NC Ak .450 441 Throw Ak .530 445 Throw CFM 10" Diameter Ps NC Ak .