Engineering Bulletin

ManualsBrandsHart & Cooley ManualsDiffusers8" Steel T-Bar Plate Diffuser (DPD Series)

Engineering Data

157Recommended Noise Criteria and Face Velocity Ranges are on page 163.

RENPS, ARENPS, PDS (Page 94, 98)

300 400 500 600 700 800 900 1000 1100

CFM 60 80 100 120 140 160 180 200 220

Ps .008 .011 .017 .024 .032 .042 .054 .066 .080

NC <20 <20 <20 <20 24 27 32 36 38

Throw 1.0 2.0 3.0 3.0 4.0 4.0 5.0 5.0 6.0

CFM 105 140 175 210 245 280 310 350 385

Ps .008 .011 .017 .024 .034 .043 .054 .068 .083

NC <20 <20 <20 20 24 27 30 34 38

Throw 2.0 3.0 4.0 4.0 5.0 6.0 7.0 8.0 8.5

CFM 165 220 270 325 385 430 490 550 600

Ps .008 .012 .017 .024 .032 .043 .056 .068 .082

NC <20 <20 20 24 29 33 36 39 42

Throw 2.0 3.0 4.0 5.0 5.0 6.0 7.0 8.0 9.0

CFM 230 310 390 470 550 610 700 780 870

Ps .009 .016 .026 .037 .050 .065 .080 .100 .125

NC <20 <20 20 23 26 31 34 37 40

Throw 3.0 4.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0

CFM 315 430 535 640 750 855 960 1090 1200

Ps .009 .016 .026 .037 .050 .065 .083 .125 .150

NC <20 20 25 30 35 39 43 45 48

Throw 3.0 5.0 6.0 7.0 8.0 9.0 10.0 11.0 12.0

12"

Diameter

An .780

14"

Diameter

An 1.070

Diameter

An .200

Diameter

An .350

10"

Diameter

An .540

Note: The use of a balancing hood is recom m ended to balance the system .

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

-12

watts) ASHRAE 36-72.

Term inal Velocity of 75 FPM An = Neck Area in Sq. Ft.

Term inal Velocity of 75 FPM

An = Neck Area in Sq. Ft.

NC = Noise Criteria based on 10dB room absorption (Re: 10

-12

watts).

HVS, HVS R6, FPD FPD3 (Page 95)

400 500 600 700 800 900 1000 1200 1400 1600

CFM 80 100 120 135 155 175 195 235 275 315

Ps .008 .012 .017 .021 .028 .035 .043 .063 .086 .112

NC <20 <20 <20 <20 <20 <20 20 25 30 35

Throw 2.0 3.0 3.0 3.5 4.0 4.5 5.0 6.0 7.0 8.0

CFM 140 175 210 245 280 315 350 420 490 560

Ps .010 .015 .022 .029 .038 .049 .060 .086 .117 .150

NC <20 <20 <20 <20 20 25 30 35 35 40

Throw 3.5 4.5 5.5 6.5 7.0 8.0 9.0 10.5 12.5 14.5

CFM 220 270 325 380 435 490 545 655 765 870

Ps .014 .021 .030 .041 .054 .068 .084 .122 .167 .212

NC <20 <20 <20 20 25 30 35 35 40 45

Throw 5.5 7.0 8.5 10.0 11.0 12.5 14.0 17.0 19.5 22.0

CFM 315 390 470 550 630 705 785 940 1100 1255

Ps .015 .023 .033 .045 .060 .072 .094 .132 .180 .230

NC <20 <20 20 25 30 35 35 40 45 45

Throw 6.0 7.5 9.0 10.5 12.0 13.5 15.0 18.0 21.0 24.0

CFM 430 535 640 750 855 960 1070 1285 1500 1710

Ps .023 .036 .051 .071 .093 .115 .140 .205 .277 .350

NC <20 <20 20 25 30 35 40 40 45 45

Throw 6.5 8.0 9.5 11.5 13.0 14.5 16.0 19.0 22.5 25.0

12"

An .780

Ak 1.650

14"

An 1.070

Ak 2.060

Term inal Velocity of 75 FPM

An = Neck Area in Sq. Ft.

NC = Noise Criteria based on 10dB room absorption (Re: 10

-12

watts).

An .200

Ak .780

An .350

Ak .920

10"

An .540

Ak 1.200

DPD, DPD R6 (Page 94)

RFPS (Page 98)

300 400 500 600 700 800 900 1000 1200

CFM 60 80 100 120 140 160 180 200 235

Ps .005 .009 .015 .021 .027 .037 .047 .058 .080

NC <20 <20 <20 <20 21 26 32 34 39

Throw 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.5 6.5

CFM 105 140 175 210 245 280 315 350 420

Ps .007 .012 .019 .027 .037 .049 .060 .074 .110

NC <20 <20 <20 <20 22 28 33 36 41

Throw 2.5 3.5 4.5 5.5 6.5 7.0 8.0 9.0 10.5

CFM 165 220 270 325 380 435 490 545 655

Ps .008 .015 .023 .033 .046 .060 .076 .093 .135

NC <20 <20 <20 22 27 32 36 39 43

Throw 3.5 4.5 5.5 6.5 7.5 8.5 9.5 11.0 13.0

CFM 235 315 390 470 550 630 705 785 945

Ps .010 .018 .027 .039 .053 .070 .088 .110 .160

NC <20 <20 <20 20 27 35 38 41 45

Throw 3.5 5.0 6.0 7.5 8.5 10.0 11.0 12.5 15.0

CFM 320 430 535 640 750 855 960 1070 1285

Ps .011 .020 .031 .045 .060 .080 .105 .125 .180

NC <20 <20 <20 25 31 34 39 43 49

Throw 4.0 5.5 7.0 8.5 10.0 11.0 12.5 14.0 16.5

Notes: NC is Noise Criteria based on 10dB room absorption (Re: 10

-12

watts).

Throw in feet m easured at a term inal velocity of 100 FPM.

The change in throw due to pattern selection is not significant.

Measurem ents were m ade on Alnor Therm o-Anem om eter Model 8565.

12"

Diameter

Ak .780

14"

Diameter

Ak 1.070

Neck Velocity

Diameter

Ak .200

Diameter

Ak .350

10"

Diameter

Ak .540

PDSD (Page 99)

300 400 500 600 700 800 900 1000 1200

CFM 60 80 100 120 135 155 175 195 235

Ps .007 .013 .020 .029 .037 .048 .062 .076 .110

NC <20 <20 <20 20 21 24 28 33 37

1-W ay Throw 4.0 6.0 7.0 8.0 10.0 11.0 13.0 14.0 16.0

2- and 3-W ay Throw 3.5 4.5 6.0 7.0 8.0 9.5 10.5 11.5 13.0

4-W ay Throw 2.5 3.5 4.5 5.0 6.0 7.0 7.5 8.0 9.0

CFM 105 140 175 210 245 280 315 350 420

Ps .011 .019 .030 .043 .059 .077 .097 .120 .173

NC <20 <20 <20 20 22 27 31 35 40

1-W ay Throw 6.0 8.0 10.0 11.5 13.0 14.5 16.0 18.0 21.0

2- and 3-W ay Throw 5.0 7.0 8.5 10.5 12.0 13.5 14.5 16.0 19.0

4-W ay Throw 4.0 5.0 6.5 7.5 9.0 10.0 11.5 12.5 14.0

CFM 165 220 275 325 380 435 490 545 655

Ps .015 .026 .040 .046 .076 .100 .125 .115 .225

NC <20 <20 <20 21 27 33 37 40 45

1-W ay Throw 8.5 11.0 14.0 16.5 19.0 22.0 25.0 27.0 30.0

2- and 3-W ay Throw 7.5 10.0 12.5 14.5 17.0 19.5 22.0 24.0 27.0

4-W ay Throw 5.0 7.0 8.5 10.5 12.0 14.0 15.5 17.0 20.0

CFM 235 315 395 470 550 630 705 785 940

Ps .016 .029 .045 .068 .086 .113 .140 .170 .250

NC <20 <20 <20 20 25 32 35 38 44

1-W ay Throw 10.0 13.0 16.5 19.5 22.0 25.0 27.0 30.0 34.0

2- and 3-W ay Throw 8.5 11.5 14.5 17.5 20.0 22.0 25.0 27.0 30.0

4-W ay Throw 6.0 8.0 10.0 12.0 14.0 16.5 18.0 20.0 23.0

CFM 320 430 535 640 750 855 960 1070 1285

Ps .021 .037 .057 .082 .112 .145 .180 .225 .320

NC <20 <20 20 26 31 36 40 44 49

1-W ay Throw 11.0 15.0 19.0 22.5 26.0 29.0 32.0 35.0 39.0

2- and 3-W ay Throw 10.0 13.5 17.0 20.0 23.0 26.0 28.0 31.0 35.0

4-W ay Throw 7.0 10.0 12.0 14.4 17.0 19.0 21.0 23.0 27.0

Neck Velocity

Notes: The use of a balancing hood is recom m ended to balance the system .

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

-12

watts) ASHRAE 36-72.

Term inal Velocity of 75 FPM

Diameter

An .200

Diameter

An .350

10"

Diameter

An .540

12"

Diameter

An .780

14"

Diameter

An 1.070

300 400 500 600 700 800 900 1000 1200 1400 1600

CFM 60 80 100 120 135 155 175 195 235 275 315

Ps .004 .006 .010 .014 .018 .023 .030 .037 .054 .073 .096

NC <20 <20 <20 <20 <20 <20 20 25 30 35 40

Throw

1.0 1.0 2.0 2.0 2.5 3.0 3.5 4.0 4.5 5.5 6.5

CFM 105 140 175 210 245 280 315 350 420 490 560

Ps .010 .010 .015 .022 .029 .038 .049 .060 .086 .117 .150

NC <20 <20 <20 <20 20 25 30 30 35 40 45

Throw

2.0 2.5 3.5 4.0 4.5 5.0 5.5 6.0 7.0 8.0 9.0

CFM 165 220 275 325 380 435 490 545 655 765 875

Ps .014 .014 .021 .030 .041 .054 .068 .084 .122 .167 .212

NC <20 <20 <20 <20 20 25 30 35 40 45 50

Throw

3.0 4.0 5.5 6.5 8.0 9.0 10.5 11.5 14.5 17.0 20.0

CFM 235 315 395 470 550 630 705 785 945 1100 1260

Ps .015 .015 .023 .033 .045 .060 .072 .094 .132 .180 .230

NC <20 <20 <20 20 25 30 35 35 40 45 50

Throw

4.0 5.5 7.0 8.5 10.0 11.5 13.0 14.5 17.5 20.5 24.0

CFM 320 430 535 640 750 855 960 1070 1280 1500 1710

Ps .023 .023 .036 .051 .071 .093 .115 .140 .205 .277 .350

NC <20 <20 <20 25 30 35 35 40 45 50 55

Throw 5.0 7.0 8.5 10.5 12.0 13.5 15.5 17.0 20.5 24.0 24.5

Neck Velocity

14"

An 1.07

Ak .393

An .200

Ak .279

An .350

Ak .354

10"

An .540

Ak .400

12"

An .780

Ak .397