8/8/2019 Linear Slot Diffuser
1/15
Ul
Rill ES O
L IN E R S L O T
IF F U S E R S
8/8/2019 Linear Slot Diffuser
2/15
LINE R SLOT SUPPLY IR DIFFUSER
LINE R SLOT DIFFUSER WITH DEFLECTION BL DES
ND VOLUME CONTROL D MPER
• • A t
PRODUCT DESCRIPTION
• The linear slot diffuser with deflection blades and
control damper is constructed of extruded
aluminium alloy and are polyester powder coated
finish.
• The fully adjustable deflection blades allow for the air
pattern to be controlled along the ceiling straight
down or at some intermediate setting.
• The deflecting blades are designed so that when in
the closed position the air pressure tends to
form a tight seal.
• The slots are available in 3/4 or 1 width.
• The air flow rate can be varied without changing the
air pattern by the use of the volume control damper
attached to the rear side of the diffuser.
Listed Sizes
3/4 Slot Width
• The volume control damper consists of two strips of
extruded aluminium one fixed and one movable.
• They both have 5/8 x 7/8 rectangular holes on
1-3/4 center for 3/4 and 1 slot opening.
• By offsetting the holes the air flow rate can be reduced.
• Damper works also as equalizing grid.
• Maximum length supplied - 10 feet.
• Standard finish is white calor for slot diffuser and
deflection blades. Damper in black calor. Painted
under electrostatic polyester powder coated system.
Other colors available on request. The polyester
powder of highest quality are used to enhance the
appearance of the units.
No. of
Slots
1 2
3 4
5
6
7
8
A in. 1.65 2.99
4.33
5.67 7.01
8.35
9.65 10.94
B in. 1.42 2.76 4.09 5.43 6.81 8.15 9.41 10.71
C in. 3.31 4.61
5.94
7.28
8.58 9.96 11.38
12.64
CFM/FT 10-100
20-125
30-150
40-200
50-250
60-300 70-350 80-400
1 Slot Width
No. of
1 2 3
4
5
6
7
8
Slots
A in.
1.94
3.58
5.23
6.88
8.52
10.17 11.81
13.46
B in.
1.70
3.35 4.99 6.64
8.28 9.93 11.58 13.22
C in.
3.48
5.13
6.77
8.42
10.06 11.71
13.36 15.00
CFM/FT
10-100 20-125 30-150 40-200
50-250 60-300 70-350
80-400
7
8/8/2019 Linear Slot Diffuser
3/15
L S A
LINE R SLOT RETURN IR DIFFUSER
LINE R SLOT DIFFUSER WITH DEFLECTION BL DES
ND WITHOUT VOLUME CONTROL D MPER
-I
I
B
- I
r
PRODUCT DESCRIPTION
• The linear slot diffuser with deflection blades is
constructed of extruded aluminium alloy and are
polyester powder coated finish.
• The slots are available in 3/4 or 1 width.
• Maximum length supplied - 10 feet.
• The fully adjustable deflection blades allow for the air
p.attern to be controlled along the ceiling straight
down or at some intermediate setting.
• The deflecting blades are designed so that when in
the closed position the air pressure tends to form a
tight seal.
• Standard finish is white calor for slot diffuser and
deflection blades. Painted under electrostatic
polyester powder coated system. Other colors
available on request. The polyester powder of highest
quality are used to enhance the appearance of the
units.
Listed Sizes
3/4 Slot Width
No. of
6 7
8
Slots
1 2
3
4 5
A in.)
1 65
2 99
4 33 5 67 7 01 8 35 9 65 10 94
B in.)
1 42
2 76 4 09
5 43
6 81 8 15
9 41
10 71
C in.) 3 31
4 61 5 94 7 28 8 58 9 96 11 38 12 64
CFM/ft.
10 100
20 125 30 150
40 200 50 250
60 300
70 350 80 400
1 Slot Width
No. of
1 2
3
4 5 6
7
8
Slots
A in.)
1 94 3 58 5 23
6 88 8 52 10 17
11 81
13 46
B in.)
1 70
3 35
4 99 6 64 8 28
9 93 11 58
13 22
C in.)
3 48
5 13
6 77
8 42
10 06 11 71 13 36 15 00
CFM/ft.
10 100
20 125
30 150
40 200
50 250 60 300 70 350
80·400
7 2
8/8/2019 Linear Slot Diffuser
4/15
LINE R SLOT RETURN IR DIFFUSER
LINE R SLOT DIFFUSER WITHOUT DEFLECTION BL DES
ND WITH VOLUME CONTROL D MPER
------ A-------.1
2-3/8 I J-----;-I ---±__--____I'
[ : 1 1 / 4 1
c
J
PRODUCT DESCRIPTION
• The linear slot diffuser with volume control damper
and no deflection blades is constructed of extruded
aluminium alloy and are polyester powder coated
finish.
• They both have a series of 5/8 x 7/8 rectangular holes
on 1-3/4 center, for 3/4 and 1 slot opening.
• By offsetting the holes the airflow rate can be reduced.
• The air flow rate can be varied by the use of the volume
control damper attached to the rear side of the diffuser.
• Maximum length supplied - 10 feet.
• The volume control damper consists of two strips of
extruded aluminium, one fixed and one movable.
• Standard finish is white color for slot diffuser. Damper
in black calor. Painted under electrostatic polyester
powder coated system. Other colors available on
request. The polyester powder of highest quality are
used to enhance the appearance of the units.
Listed Sizes
3/4 Slot Width
No. of
Slots
1 2
3
5
6
7 8
A in.) 1.65 2.99 4.33 5.67 7.01 8.35
9.65 10.94
B in.)
1.42
2.76 4.09 5.43 6.81 8.15
9.41
10.71
C in.) 3.31 4.61 5.94 7.28 8.58 9.96 11.38 12.64
CFM/FT.
10-100 20-125 30-150 40-200 50-250 60-300
70-350
80-400
1 Slot Width
No. of
1
2 3
4 5
6
7
8
Slots
A in.)
1.94
3.58
5.23 6.88 8.52
10.17
11.81
13.46
B in.) 1.70 3.35 4.99 6.64 8.28 9.93 11.58 13.22
C in)
3.48
5.13
6.77
8.42
10.06
11.71
13.36 15.00
CFM/FT.
10-100
20-125 30-150 40-200 50-250
60-300
70-350
80-400
7
8/8/2019 Linear Slot Diffuser
5/15
END C P RR NGEMENTS
SLOT DIFFUSER WITHOUT END C P SLOT DIFFUSER WITH ONE END C P RIGHT OR
LEFT
I• • L = NOMINAL SIZE
1 L
NOMINAL SIZE
END C P BOTH ENDS
I
I
I
I
I ·
END CAP LEFT
1 1 ·
WITHOUTENDCAP
1 1 ·
END CAP RIGHT
I
7
8/8/2019 Linear Slot Diffuser
6/15
ear Slot Supply Diffuser Featuring Fully Adjustable Deflection
a es. The Deflection Blades Provide Combinat ion Air Pattern Flow
ate Control and Blank Off.
Si gle Slot Ad justments
Horizontal Left
Horizontal Right
Fully Vertical
Fully Closed
Multiple Slot Adjustments Up to 8 Slots Wide
One Way
Opposed Imbalance
IMPORTANT NOTE:
In all air slot type diffusers constriction of free area by blade
relationships must be set carefully so as not to throttle airstream
with resultant increase in static pressure and noise level criteria.
It is recommended that care be exercised in setting blades to
prevent such excessive constriction of air passageway.
2 Way throw may be obtained by staggering each length
of deflection blades alternately from right to left.
Two Way
Vertical and Horizontal
7
8/8/2019 Linear Slot Diffuser
7/15
MITERE ORNERS
SIDE W LL INSIDE CORNER
SIDE W LL OUTSIDE CORNER
...----- 11-13/16
. 11-13/16
--..
CEILING CORNER PIECES Available in one through eight slots
7-6
8/8/2019 Linear Slot Diffuser
8/15
•
LINE R SLOT IR DIFFUSERS
ENGINEERING D T
Blade Settings
T e deflection blades of the supply slot linear
diffuser can be adjusted to give either a horizontal
or vertical air pattern. The horizontal air flow
adjustment may be set for either left or right hand
throw.
.• . .
/
I \
I \
I
/
.• .
.
Changing the blade setting also changes the
noise and total pressure.
Throw Data
All throw data is based on the results of tests of
4-feet length diffusers. To determine throws for
other diffuser lengths, use correction factors as
follows:
Diffuser Active Length(ft.
1
2 3
4
6-8
Throw Correction Factor 0.6 0.8 0.9
1.0 1.3
Sound Data
Sound data (NC values) shown in the Performance
Tables are based on a room absorption of 10dB,
re 10-
Watts and a 4-feet unit test length. To
determine NCvalues for other lengths, add NC value
to catalog data as follows:
Diffuser Active Length (ft.) 2
3
4
5
6-8
Add NC Value (dB) -3.0 -1.5
0
1.0 2.0
Select ion Procedure
The horizontal throw data is presented in the
performance data pages with all slots supplying air
in a given direction. To determine two-way throw,
use the catalog throw data for the desired quantity
of air from the number of slots in each direction
and reduce the throw by twenty percent.
Example
Determine the throw for an LS3-AD (3/4 Slot Width)
2 ft. long, 3-slot diffuser with 250 CFM in one
direction and 120 CFM in the other.
A. 250 CFM, 2 , 2-slots
125 CFM/ft
Catalog throws 31 - 37
Throws x 0.80 25 - 30
B. 120 CFM, 2 , t-slot
60-CFM/ft
Catalog throws 22 - 26
Throw x 0.80
18 - 21
rea Factor Summary
Slot
Number of
Horizontal Vertical Return
Width
Slots
1
0.073 0.121 0.123
2
0.135 0.180 0.184
3
0.201 0.237 0.242
3/4
4
0.265 0.295 0.301
5
0.330 0.355 0.362
6
0.395
0.413 0.421
7
0.455
0.470
0.479
8
0.520 0.530 0.539
1 0.088
0.184
0.188
2 0.162
0.274
0.281
3
0.241 0.360 0.367
1
4
0.318 0.448
0.457
5
0.396 0.540 0.551
6
0.474
0.628 0.641
7 0.546 0.714 0.732
8
0.631 0.806 0.822
8/8/2019 Linear Slot Diffuser
9/15
SUPPLY LINEAR SLOT AIR DIFFUSERS
PERFORMANCE DATA
Model : LS3 AD
Linear Diffuser 3/4 Slot Width
No. 01
CFM/FT.
10 20
30
40
50 60 70 80 90 100 125 150
200 250
Slots
300
350
400
HOR.SP
.022
.089 .200 .356 .557 .802 1.092
1.426
. 1.804
2.228
THROW
7 10 13 15 15 19 18 21 20 24
22 26 23 28 25 30 27 32 28 33
NC
50 >50 >50
1
VERT. SP
.010 .039 .088 .353
.480
.627
.794
.. 980
157 .245
THROW
2 5 9 15 16 23 22 27 25 30 27 32 29 35 31 37 33 39 35 42
NC
8/8/2019 Linear Slot Diffuser
10/15
SUPPLY LINEAR SLOT AIR DIFFUSERS
PERFORMANCE DATA
Model : LS3 AD
Linear Diffuser 1 Slot Width
No cl
CFM/FT.
10 20 30 40 50 60 70 80 90 100 125 150 200 250 300 350 400
S ols
HOR. SP
010 040 090 160 250 360
490
640 810 1 000
THROW
4 8 10 15 15 19 18 21 20·24 22·26 23 28
25·30
27 32 28 33
NC
50
>50 >50
1
VERT. SP
007 029 066
117
183 263 358
468
592 731
THROW
2 4
8·15
16 22 21 27 25·29 27·32
29·35
31·37 33 39 35·42
NC
8/8/2019 Linear Slot Diffuser
11/15
RETURN LINEAR SLOT AIR DIFFUSERS
PERFORMANCE DATA
Model : LS
Linear slot diffuser with deflection blades and without volume control damper 3/4 Slot Width).
o. of
Negative SP 005 022
048 086 133 196
270
354
Slots
1
CFM/Foot
10 20 30
40
50
60
70
80
NC
50
CFM/Foot 80 160 240 320 400
480
560 640
8
NC
50 >50 >50 >50 >50
• NC Data based on 1OdB room attenuation.
• Static Pressure SP) in inches w.g.
7 1
8/8/2019 Linear Slot Diffuser
12/15
RETURN LINEAR SLOT AIR DIFFUSERS
PERFORMANCE DATA
Model : LS3
Linear slot diffuser with deflection blades and without volume control damper 1 Slot Width).
o. of
Negative SP
16 34
55 86 123
16 1 2 5
35 4
Slots
1
CFM/Foot
2
3
4
5
6 7 8 1
NC
8/8/2019 Linear Slot Diffuser
13/15
L NCING O T
Supply Air Testing
Step 1 : Place an Alnor jet 2220A as per sketch, and take velocity
readings at frequent intervals along one slot of a group of
slots having the same blade settings.
Take readings at approximately 6 from end and at 1 foot
intervals, being careful to avoid readings directly below
spacer bars which are at 18 intervals. Take atleast four
readings on units under 4 feet long.
Average the readings to obtain Average Velocity Vk).
Step 2 : From table select the Ak for number of slots which have the
same blade settings.
Step 3 : Determine L as the length in feet of the section of slots having
the same settings.
Step 4 : Calculate CFM.
a. For Horizontal
Measure Vk on the side of slot as shown in Fig 1).
Take Ak from table.
Total CFM Ak x Vk x L.
b. For Vertical
Measure Vk on one side of the slot as shown in Fig 2).
Take Ak from table.
Total CFM Ak x Vk x L.
Return Air Testing
Measure Vk in the open side of the slot as shown in Fig 3).
Take Ak from table.
Total CFM
Ak x Vk x L.
AIR FLOW
Fig. 1)
AIR FLOW
Fig. 2)
AIR FLOW
Fig. 3)
7 2
8/8/2019 Linear Slot Diffuser
14/15
INSTALLATION DETAILS
Duct Width
1/16
-0
B
I
1 5/8
J
0 3/8
Ceiling Opening
C
Ceil ing Opening for 3 4 Slot Width
No_ of
3
6
Slots
1
2
4
5
7
8
A in.
1 65 2 99
4 33
5 67
7 1
8 35 9 65
1 94
B in.
1 42
2 76 4 9 5 43 6 81 8 15
9 41
1 71
in. 3 31 4 61 5 94 7 28 8 58 9 96 11 38 12 64
D in. 2 28 3 62 4 95 6 29 7 67 9 1 1 27 11 57
Cei li ng Open ing for 1 Slot Width
No. of
1 2 3 4 5 6 7
8
Slots
in.
1 94 3 58 5 23 6 88 8 52 1 17 11 81
13 46
B in.
1 7 3 35 4 99 6 64 8 28 9 93 11 58
13 22
in.
3 48
5 13
6 77
8 42
1 6
11 71
13 36 15
D in.
2 57
4 21 5 86 7 5
9 15 1 8 12 44
14 9
7 13
8/8/2019 Linear Slot Diffuser
15/15
LINEAR SLOT DIFFUSERS
E GINEERING CALCULATION
R - Radius up to grille inside. R
GRILLE S SEGMENT
h
L
180
_ m m _ m _ . m m m m m m · · · · · F = = · R m m . m . m
Semi-Circular Grille; Arch Length
=
11x R.
Grille Arch Length. AIL .
AIL
=
e x 11/180 x R
e
Angle, R - Radius
h
=
Segment Height.
R 1 - COS 9/2».
L
=
Segment Length.
2 x R x SIN 9/2».
Full-Circular Grille; Arch Length 2 x 11x R.
NOT S
• All Curved Linear Slot Diffusers are ceiling mount.
• The least radius of curvature is 1.5 meters.
• Hit miss damper for above diffusers will not be provided.
Full function of deflector (pattern controllers) may not be obtained
in above diffusers.