Engineering Data
Note: The use of
a balancing hood
is recommended to
balance the system.
NC is based on 10
db room attenuation
(Re: 10 -
12
watts)
ASHRAE 36-72.
X=less than 20.
Terminal velocity of
75 FPM.
PD, PDR, RFPR, RENP (Page 60, 66, 67)
Probe Position: The probe is held 1 inch in from the outer edge of the diffuser, flush with the face.
PROBE
POSITION
SBP (Page 93)
Three-Way (Short Throw)
• For throw in all three directions,
use short throw data.
1 2
3 4
1 2
3 4
Notes:
1. Tests conducted in accordance with ANSI/ASHRAE 70-1991 at isothermal conditions.
2. Tests conducted with a straight rigid inlet condition. Other inlet conditions may alter
performance.
3. Unit of measure: Neck Velocity = FPM; Velocity Pressure = in. w.c. Air Flow Rate = CFM;
Total Pressure = in. w.c. Throw = ft at 50, 100, and 150 fpm terminal velocity
4. Noise Criteria (NC) is based upon 10 dB room absorption (Re: 10
-12
watts) evaluated at 125 thru 4000 Hz octave bands.
5. Flow hoods are recommended for system balancing.
Four-Way (Short Throw)
• For throw in all four directions,
use short throw data.
Three-Way (Long & Short)
• For throw in the #2 & #4 direction
use long throw data.
• For throw in the #1 & #3
directions, use short throw data.
Two-Way Corner
(Long & Short)
• For throw in the #2 & #4 direction
use long throw data.
• For throw in the #1 & #3
directions, use short throw data.
Two-Way (Long Throw)
• For throw in both directions use
long throw data.
Two-Way (Short Throw)
• For throw in both directions use
short throw data.
One-Way (Long Throw)
• For throw use long throw data.
1 2
3 4
1 2
3 4
300 400 500 600 700 800 900 1000 1200 1400
.006 .010 .016 .022 .031 .040 .051 .062 .090 .122
CFM 60 80 100 120 140 160 180 200 240 280
Total Pressure .005 .008 .013 .025 .025 .032 .041 .050 .027 .098
Short Horizontal Throw 2-1-1 2-1-1 3-1-1 3-2-1 4-2-1 4-2-1 5-2-2 5-3-2 6-3-2 7-4-2
Long Horizontal Throw 3-1-1 4-2-1 5-2-2 6-3-2 7-3-2 8-4-3 9-4-3 10-5-3 12-6-4 14-7-5
Noise Criteria <20 <20 <20 <20 <20 22 24 26 31 37
CFM 105 140 175 210 245 280 315 350 420 490
Total Pressure .009 .015 .024 .034 .046 .061 .077 .095 .136 .185
Short Horizontal Throw 3-1-1 4-2-1 5-2-2 6-4-3 7-3-2 8-4-3 9-4-3 10-5-3 12-6-4 14-7-5
Long Horizontal Throw 5-3-2 7-4-2 9-5-3 11-5-4 13-6-4 15-7-5 16-8-5 18-9-6 22-11-7 25-13-8
Noise Criteria <20 <20 <20 <20 20 25 30 34 39 44
CFM 165 220 275 330 385 440 495 550 660 770
Total Pressure .013 .023 .036 .052 .071 .092 .117 .144 .208 .283
Short Horizontal Throw 5-2-2 6-3-2 8-4-3 10-5-3 11-6-4 13-6-4 14-7-5 16-8-5 19-10-6 23-11-8
Long Horizontal Throw 9-5-3 12-6-4 15-8-5 18-9-6 21-11-7 24-12-8 27-14-9 30-15-10 36-18-12 42-21-14
Noise Criteria <20 <20 <20 22 25 28 33 36 41 47
CFM 240 320 400 480 560 640 720 800 960 1120
Total Pressure .017 .030 .047 .068 .093 .121 .153 .189 .273 .371
Short Horizontal Throw 7-4-2 10-5-3 12-6-4 15-7-5 17-9-6 20-10-7 22-11-7 25-12-8 30-15-10 35-17-12
Long Horizontal Throw 14-7-5 19-9-6 23-12-8 28-14-9 33-16-11 37-19-12 42-21-14 47-23-16 56-28-19 65-33-22
Noise Criteria <20 <20 21 25 29 32 35 38 44 50
CFM 330 440 550 660 770 880 990 1100 1320 1540
Total Pressure .020 .036 .057 .081 .111 .145 .183 .226 .326 .443
Short Horizontal Throw 11-6-4 15-7-5 18-9-6 22-11-7 26-13-9 29-15-10 33-17-11 37-18-12 44-22-15 52-26-17
Long Horizontal Throw 21-10-7 28-14-9 34-17-11 41-21-14 48-24-16 55-28-18 62-31-21 69-34-23 83-41-28 97-48-32
Noise Criteria <20 <20 25 31 36 40 43 45 48 53
12"
Diameter
14"
Diameter
Neck Velocity
Velocity Pressure
6"
Diameter
8"
Diameter
10"
Diameter
200 300 400 500 600 700 800
CFM 40 60 80 100 120 135 155
-Ps .003 .007 .012 .019 .027 .034 .044
CFM 70 105 140 175 210 245 380
-Ps .004 .010 .017 .026 .037 .051 .068
CFM 11 0 165 220 275 325 380 435
-Ps .005 .011 .020 .030 .043 .058 .076
CFM 155 235 315 395 470 550 630
-Ps .005 .012 .021 .033 .046 .063 .083
CFM 215 320 430 535 640 750 855
-Ps .006 .013 .023 .035 .050 .069 .090
CFM 280 420 560 700 840 975 1115
-Ps .008 .018 .031 .048 .070 .094 .120
CFM 355 530 705 885 1060 1235 1415
-Ps .008 .018 .031 .049 .070 .092 .125
CFM 735 1100 1470 1835 2200 2570 2935
-Ps .008 .018 .032 .050 .070 .095 .130
16" Diameter
18" Diameter
24" x 24"
Neck Velocity
6" Diameter
8" Diameter
10" Diameter
12" Diameter
14" Diameter
Recommended Noise Criteria and Face Velocity Ranges are on page 75
114
Engineering Data
Engineering Data