HomeMy WebLinkAboutB13-0554 REV2 Sound Tubing Specs Bulletin 20-54
The U�iGO Sy�t�em° �rn��sP�cr�rc�rranrs
Supply and Sound Attenuator Duct
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UPC-25/225 UPC-26/226
Model Nur�ber(Unico Paot Code}
uPC 25 �� _ � Application
� The Unico sound attenuator significantly reduces sound
Quantity Per Box from the outlets. The aluminum supply tubing does not.
Rated R-Factor* Therefore, for proper noise control, it is recommended to
R-s s�s€��d��d� use at least 3 feet(1 m)of the sound attenuator at the end of
R-4,2
a-�.o every supply branch run. Optionally, the entire branch duct
R-a o can be made of one or more lengths of the sound attenuator.
Rev.Code(optional) For long duct runs, the aluminum core tubing is stronger
than the sound attenuator core and is best to construct the
os�rneter, inside branch duct usin almost all aluminum su 1 tubin with a
25=2 ineh Supply Tubing g PP Y g
zz5=2.5�nc�,supp�y rueing 3-foot (0.9 m) length of sound attenuator at the end(Figure
?6=2 inch S�pply 7ubing 1�.
������ 226=2.5 incfi Supply Tubing
Where runs are required to be installed in unconditioned
General spaces every attempt should be made to limit the length of
the duct run to 12-feet or less using the proper R-factor for
The aluminum supply tubing and sound attenuator is an the application. However, as an air duct, there is no limit to
insulated flexible air duct. The insularion is designed to the length used other than its abiliry to deliver the air.
prevent condensation from forming on the outside of the
duct and to minimize thermal losses to the surrounding Small ducts have a much higher effective efficiency than the
environment. R-factor indicates because the R-factar is based on flat wall
thickness, which is appropriate for large round ducts. The
The supply and sound attenuator tubing is offered in two small ducts were reviewed by the International Code
diameters with several different choices of insulation Council Evaluation Services for compliance with LC-1001
thickness. In most cases, the standard supply tubing should (Listing Criteria for SDHV Air Distribution Systems). If the
be used. However, for extremely cold or humid local code requires a minimum R-factor, you can use the
environments or where the local building code requires a evaluation report as justification far installing a small duct
specific R-factor and the duct is installed in an system with a slightly lower R-factar. The certificarion can
unconditioned space, use the R4, R6, or R8 products. The be found online at (http://www.icc-es-
R4, R6, and R8 ducts have thicker and heavier insulation pm�.or /Lp istin� Director /y�df/PMG-1002.pdfj.
than the standard�nodel to reduce thermal losses.
�NS e R r�,�
COWFORMS TO UL STOt 181 I���
CERTIFIED TD
CANlULC STD 5770-lN8S
C US ��i6
usTa� scez
Note—Specifications,Ratings,and Dimensions are subject to change without notice. OO COpYI'Iglll 2O1 O UIlICO, �nC.
Bulletin 20-54—Page 2
Supply Ouqet �ound Altenualor 5upply Tubing(32 f1.Max.a transfer. Fiber lass blanket insulation fills the void between
{U?G26C] �
rl4` ', - - . . - � )''
the jacket and core of the tube.
s���m co��a�mR The standard and the R-4 duct have one insulation layer and
Scrirn Goee Clamp Eu��.�� va or barrier. The R6 and R8 ducts both have two la ers of
(UPG-53) Takeofl p y
Methvc�A(for 6 td 12 ft. runsy qf UPC a� insulation and a double vapor seal for both supply and
sound attenuatar tubing.
Supply Out9et
3 ft.min'�aund AtEenuator Supply Tuhing� plum.Core Clamp Mylar Jacket(outer layer)\
(UPC-52) . _
Fiberglass Insulation�� j�
(outerlayer) �
�I 0 � , t:l.;� ' �''; )." -
� � � � � �� • • � Mylar Jacket(inner layer) �
A9urr�lnum Core Supply Tu6�r�g � � �
�uPC-zs} Fiberglass Insulation- '��
Scrim Core Glamp Takeoff (inner layer) � � - � �
(UPC•53) Suppfy Tubing Coupling �. \
{uPC-3eey Two-Ply Corrugated
� ,n���.� �•
hllethod B(fo�6 to 3p ft. ru�rrs} Aluminum Core �� � �
�� ,I�
Figure 1:Assembly of Branch Duct Runs �`� �`�;��� �
//r�P�i� ��� ; iiliull�l� � f��
�������V�� ` I i i I �� ��V� �
Construction ����``�;i�;;;,���� —
��-' — ��oa,>s�.
The aluminum supply tubing is supplied in 25-foot(7.7- m)
lengths while the sound attenuatar tubing is supplied in 12- Figure 3.Typical Supply Tubing Construction(R-6 and R-8)
foot lengths. Both the aluminum and sound attenuator Duct Heat Gain/Loss
tubing can be cut as needed. As shown in Figure 2,both the
standard and R-4 models have 3 components. Whenever a duct is installed in an unconditioned space, the
heat gain and loss calculations must include duct loss. These
are based on both thermal losses and losses due to leakage
nnyiar�acket�-_ � for a typical installation.
sia in.Fieergiass insuiation ��_ � � The R-factar is calculated per the Air Diffusion Council
' � � � � (ADC) Flexible Duct Standard. T'his code assumes that the
/ � � � duct wall is flat. This assumption warks well for
spun-bo�ded / � conventional ducts because the duct radius is usuall uite
Nylon Core �-� Y q
large. However, far small ducts, assuming the duct wall is
`��, 1�-������� flat overestimates the thermal losses. Therefore,the R-factor
� � � �� specified for a small duct may be less than the value
� / � � � \
� I � �� �� �� I j � required for a conventional duct. This is described as an
�� ��j� � � I � � equivalent R-factor in Table 1 and is further explained in
� � � the Internarional Code Council report(PMG-1002).
��� ��—
,��__„
� """�°" Noise Level
Wire
Figure 2.Typical tubing Construction(Standard and R-4) Noise level is directly related to the rate at which air is
The inner layer/core is made of two-ply corrugated being discharged from each outlet. In general, lower
aluminum for the supply tubing or spun bound nylon for the airflow means lower noise levels; therefore additional duct
sound attenuator. The outer jacicet for both models are made runs will be required. Refer to table 3 as a guide in
designing a duct layout that will meet your specific sound
of two-ply reinforced reflective mylar; providing a vapor level requirements.
seal to prevent leakage and moisture migration, and
increases the insulation factor by reducing the radiant heat
Note—Specifications,Ratings,and Dimensions are subject to change without notice. �O COpyl"IgIII 2O1 O UIlICO, �f1C.
Bulletin 20-54-Page 3
MOC�e� Sp@CIfICat1011S Table 1. Duct R-Factor(English)
Certifications: Model Outside Dia, R-factor°F-hr-ft'/Btu
UL Standard 181 FlexibleAirDucts inch Rated* Effective**
UPG26C 3.5 33 4.0
ICC-ES PMG listed(meets thefollowing) UPG26CR4 4.0 4.2 5.2
20091rzternational Mechanical Code(Duct Systems) UPC-26CR6 5.0 6.0 7.2
20091nternational Residentictl Code(Duct System.r) UPG26CR8 6.0 8.0 9.1
2009 IAPMO Uniform�Mechanicnl Code(Duct Sysrems) UPG226 4.0 3.3 5.4
Classification: Air Duct per UL Standard 18l UPG226R4 4.5 4.2 7.0
Smoke Developed Rating: less than 50 UPC-226R6 5.5 6.0 10.3
UPG226R8 6.5 8.0 13.4
Flame Spread index: less than 25
`per ADC Flexible Duct Stendard,based on flxt thickness,k=24 Bto-in/h•ft'•°F
ItlSIC�e�13i1lCYCP: M0C�0�UpC-2$�26:2.�711C}I �S�Il1IY1� �`�`per ASFIARE 2001 Fundamentals Handbook p.2321,based on cuived[hickness
Model UPG225/226:2.5 inch(63 mm) Noce:�a�a a��s fr au��ienom a�i zo°r
Outside Diameter: See table 1 and 2 Table 2. Duct R-Factor(Metric)
Model Outside Dia, R-factor W/(m2-K)
Duct Material: Two-ply corrugated aluminum mm Rated� Effective*x
Spun Bound Nylon UPG26C 89 18.7 22.7
Filter Particle Size: Sµ UPG26CR4 102 23.8 29.5
lnsulation: Fiberelass UPG26CR6 l27 34.0 40.9
" UPC-26CR8 152 45.4 51.6
Vapor Barrier: Reinforced Aluminized Mylar UPC-226 102 18.7 30.6
Min.Pressure: negative 0.5-inch w.c.(125 Pa) UPG226R4 114 23.8 39.7
Max.Pressure: 4.0 inches w.c.(1000 Pa) UPG226R6 140 34.0 58.5
Max.Velocity: 5000 fUmin(25 m/s) UPC-226R8 165 45.4 76.1
"per ADC Flexible Duct Standard,based on flat thickness,k=34 Bm-in/h•Ct'•°F
Mlri.L,OriFYII: 3 f[(1 Iri� SOUPLC�CZtt2riUCltOY +*per ASHARE 2001 Fundamentxls Handbook p.2321,based on curved thickness
None supply tuhing Note:Data at 15 ft duct length at 120°F
Max.Length: None sound uttenuator
30 ft(9 m) supply tubing
Support Distance: every 6-ft(2 m)
Min.Inside Bend Radius: 6 inch(150 mm)
R-Factor: see Table 1
Table 3. Unico S stem Sound Level Recommendations
Sound Approx. 2-inch Outlet 2'/z inch Outlet
Level dB(A) CFM Outlet\Ton* CFM Outlet/Ton* Recommended A lication
Ultra Low 25 14 14 17 12 Multimedia Rooms
Ver Low 27 19 11 23 9 Rooins with Hv�d Surfaces(wood or conerete floors and walls)
Low** 29 30 7 36 6 Rooms with Car et,Dra es,Furniture
Normal 32 40 5 50 4 Lar e Rooms or Where Sound is not Critical(�nin.number of outlets)
Excessive 35 50+ 4 60+ 3 Industrial Environments
* The namber of outlets presume that the total airflow ineets the minimum required by the air handler
�*Recommended
-Outlets/Ton is based on rated minimum rated airflow of 200 CFM per nominal ton
-dB(A)is A-weigl�ted Sound Pressure level measured 3 ft(1 m)from outlet in a reverberant room 20 x 30 ft.
NOTE: The actual sound levels measured in a room will vary depending on how the duct was installed(bends,wrinkles,outlet design)and the room
environment(carpeted,draperies,ete.). Also,the overall sound in the room depends on the number of outlets in that room.
Note-Specifications,Ratings,and Dimensions are subject to change without notice. OO COpyl"Igllf 2O1 O UIlICO, �nC.
Bulletin 20-54—Page 4
UnicoSystem Measured Sound Pressure Level in Occupied Space
70
I
@ � –
a 1
0 60 � -
J. J_
� � - i -
m i without Attenuator
� (Aluminum core only)
w 50
> � -
w
J � 1
W
� 4o I i NG45
�
� _� _ I __ � NC-40
� -- � \ � �� �-NG35
� 3� with Attenuator ' �
� -.. _!- _ 1 _
O T T T NC-30
(n - -
� I
° 20 T T –Nc-2s
a
m � T =
w t � -
� Outlet =2-inch � � T
Q Airflow=40 CFM
V �� Measured 8'from outlet in
� 13 x 8.5 typical office. —
T T T I
p T �
31.5 63 125 250 500 1k 2k 4k 8k
OCTAVE BAND CENTER FREQUENCY,Hz R9403-4
11/23/94
us cFM Sound Attenuator PerFormance
75
34
32 �� Static Pressure = 1.5 in. wc (372 Pa) �
30 65 _ __ _- —.
28 60
26 55
52 --- -------i
24 50 ,
� 22 45 �
� 20
`� 40 , Duct Diameter
Q 18 � �
' 16 35 , 2.5 in. (63.5mm)
� 14 30 �
12 25 ; 2.0 in. (50 mm)
10 20 '
8 15 �
6 �
4 �� ,
2 5 � .
0 0
0 1012 20 30 40 50 60 ft.
i i i i i i i i i i
0 2 4 6 8 10 12 14 16 18 m
L - Length R0831 Comparison
Graph3
09/28/O8
Note—Specifications,Ratings,and Dimensions are subject to change without notice. �O COpyflght 2O1 O UtlICO, �nC.
Bulletin 20-54—Page 5
us cFM Sound Attenuator PerFormance
75
34
32 �� 2 inch (50 mm) Sound Attenuator
30 65
28 60
26 55
24 50
� 22 45
0 20
� 40
Q 18
� 16 35
C'1
14 30
SP,in.wc(Pa)
1 2 25 � 175(434)
10 i so�s�z>
2� 125(310)
$ 15 �.00 czas>
6 0.75(186)
4 10
2 5
0 0
0 10 20 30 40 50 60 ft.
0 2 4 6 8 10 12 14 16 18 m
R0831 Comparison
L - Length a9;2a,o8
us cFM Sound Attenuator Performance
90
40 85
$0 2.5 inch (63.5 mm) Sound Attenuator
35 75
70
30 65
60
0 25 55
� 50
Q 20 45
� 40
35 SP,in.wc(Pa)
��j � 175(434)
3� 1.50(372)
25 125(310)
10 �.00 cz4a>
2Q 0.75(186)
15
5 10
5
0 0
0 10 20 30 40 50 60 ft.
i i i i i i i i i i
0 2 4 6 8 10 12 14 16 18 m
R0831 Comparison
L - Length Graph2
09/28/08
Note—Specifications,Ratings,and Dimensions are subject to change without notice. OO COpyl"Igllt 2O1 O UIlICO, �nC.