6
CHAPTER 6: ADC TEST STANDARDS
6.1
Performance Values
Table 1 lists the required tests and units of measurement and recommended values of minimum performance where applicable.
For comparison purpose only. Not for design. For detailed design data, refer to manufacturer ’ s product engineering data.
Property
Recommended Performance Value
R: hr·ft 2 ·°F/BTU [(m 2 ·°C/W]
Thermal Loss* All diameters
Test - Section 6.2.1 - Thermal Performance
4.2 [0.74](minimum) @ 75°F [24°C] mean temperature
Friction Loss 12" [300 mm]
Straight:(in.w.g. per 100 ft. [Pa/m] of duct @ 1000 fpm [5.1 m/s])
Test - Section 6.2.2 - Friction Loss
0.3 [2.5] (maximum)
diameter
90° bend loss coefficient (C o )
1.0 (maximum)
@ R/D = 2
26
Acoustical
Sound Attenuation Sound Generation
Test - Section 6.2.3 - Acoustical Performance Due to complexity of data, no recommended value of performance is stated. Refer to Manufacturer ’ s Data.
(dB)
Radiated Noise
Static Press./Temp
At Recommended Operating Positive Pressure (in. w.g.) [Pa]
Test - Section 6.2.4 - Static Press./Temp. Performance
12" [300 mm]
140° F [60° C] Continuous 180° F [82° C] Intermittent
diameter
Leakage
cfm/in. (dia.)·ft. (length) [L/s/mm (dia.)·m (length)]
Test - Section 6.2.5 - Duct Leakage
0.03 [1.7 x 10ˉ 4 ]
All diameters
Leakage
cu.ft./hr. [L/s]
Test - Section 6.2.5 - Duct Leakage (Including
Connections) All diameters
0.87 [1.1 x 10ˉ 5 ] D 2 (maximum) where D is internal duct diameter in inches [mm].
U.S. Perms [ng/(s·m 2 ·Pa)]
Permeance* All diameters
Test - Section 6.4.1
Water Vapor Transmission Rates of Vapor Barriers 1.0 [57.5] (maximum)
* Not applicable to uninsulated ducts.
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