DRT/DRTI
Supply air diffuser for
ceilings
DRT
DRTI
The TLR connection box is an optional accessory for DRT and DRTI.
Description
The DRT/DRTI ceiling diffuser with rotating nozzles is best
suited for comfort ventilation and VAV applications.
The unit consists of a front panel with plastic nozzles that can
be rotated in 360 °, and a back connection box with a round
air spigot connection. DRT/DRTI operates with a draught-free
air distribution, at a low noise level. The simple rotation of the
aerodynamically designed polypropylene nozzles results in a
flexible air distribution, from horizontal to a vertical mode. The
adjustment of the nozzles is also possible after installing the
diffuser. DRT/DRTI is optimal for offices, schools, department
stores or hospital applications. The unit can be mounted into
standard modular suspended ceilings, or freely suspended.
It is equipped with a circular air connection. If not otherwise
specified in the order, DRT/DRTI is delivered with the nozzles
positioned in a standard rotating air distribution pattern.
Recommended max. ∆t: -12°C.
Main features
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360° rotating nozzles
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flexible air distribution
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aesthetic appearance
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draught-free, silent operation
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excellent ventilation efficiency
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easily accessible front plate
The DRTI type is designed to fit standard modular suspended
ceilings. Its performance data are identical to the performances of the DRT units, but the external size of each format is
equal to the size of the standard (595x595 mm) suspended
ceiling plate.
Serial sizes
DRT: 125, 160, 200
DRTI: 125, 160, 200, 250, 315, 400
Airflow rates
60 - 900 m3/h (15-250 l/s), See the diagrams below for further
information.
15-03-02
Airvent reserves the right to change specifications.
www.airvent.eu
1
DRT/DRTI
Material
DRT: The front panel and the back connection box is made
of steel sheet. The frame is made of aluminum. The unit is
powder coated in RAL 9003 white colour, and has a rubber
gasket on the air connection.
DRTI: The front panel, the back connection box and the frame
is made of steel sheet, powder coated in RAL 9003 white
colour, and has a rubber gasket on the air connection.
Optional accessories
TLR commissioning box:
The TLR standard commissiong box is primarily suitable for
mounting and regulating supply air diffusers in a ceiling
installation. The TLR plenum box is recommended for applications, where there is a requirement for a low noise level
performance.
TLR commissioning box materials:
Galvanized sheet steel, sound-reducing glass-wool laminated
glass fibre insulation.
TK commissioning box:
As an option DRT and DRTI is also available with TK, a connection box which has a removable commissioning damper with
measurement tubes for the exact calculation of the airflow.
This feature simplifies the controlling and commissioning of
the airflow at any time. TK also includes internal sound insulation with optimal sound attenuation qualities. TK is primarily
suitable for mounting and regulating supply air diffusers in a
ceiling installation. The commissioning box is recommended
for applications where a low installation height is required. TK
is available with 1- or 2-step dimension change between the
air duct and the diffuser box connection. For further information about TK please contact Airvent.
1.
Mounting
Both the DRT and the DRTI are connecting directly to the TRL
box. The diffusor front plate can easily be opened with the
use of a plastic card, and removed enabling a quick installation
and cleaning.
2.
The front diffuser plate design is only an illustration.
2
Airvent reserves the right to change specifications.
www.airvent.eu
15-03-02
DRT/DRTI
Nozzle posts
Standard positioning of the nozzles
If not otherwise specified DRT/DRTI is supplied with nozzles positioned in a rotating
pattern.
Standard nozzle positioning
Optional nozzles positions
1-way air distribution
2-way air distribution
3-way air distribution
4-way air distribution
2-way air distribution,
if mounted in a corner
15-03-02
Airvent reserves the right to change specifications.
www.airvent.eu
3
40
DRT/DRTI
ØD
Dimensions
BxB
Ød
40
Table 1.
B*
Ød*
Weight/kg
125
370
330
125
2,2
160
A
370
330 L
160
2,2
200
446
406
200
3,0
ØD
A
L
A
BxB
Ød
BxB
Ød
AxA
A*
125
Weight/kg
595
330
125
4,3
160
595
A
330
160
4,3
200
595
406
200
4,6
250
595
552
250
5,1
315
595
552
315
5,1
400
595
552
400
5,1
7
49
Ød*
AxA
A
A
A
A
B*
A
Size
4
49
40
40
A
Table 3.
A
TLR commissioning box
L*
Ød* ØD* Weight/kg
125
190
170
259
266
150
125
125
1,8
160
270
220
309
316
175
160
160
3,0
200
300
250
339
346
220
200
200
4,0
250
350
300
389
396
300
250
250
5,6
315
400
375
464
471
300
315
315
9,0
400
480
460
549
556
400
400
400
13,2
Ød
H*
A ØD
49
H*
H**
H
*mm.
L
Ød
H*
49
H*
H
A*
L
H*
Size
Ød
7
ØD
49
4
40
AxA
ØD
DRTI square supply air ceiling diffusor
*mm.
49
40
40
49
AxA
Table 2.
L
BxB
Ød
H
Ød
BxB
Ød
H
49
A
ØD
A
L
H
Ød
A
A
40
H
*mm.
AxA
Ød
A*
Size
4
49
DRT square supply air ceiling diffusor
ØD
Airvent reserves the right to change specifications.
www.airvent.eu
H**
4
15-03-02
DRT/DRTI
Technical data
Table 4.
Table 5.
DRT - DRTI + TLR
Correction Ko dB
DRT - DRTI + TLR
Sound attenuation dB
*DRT
**DRTI
TLR
125
125
Medium frequency (Hz)
63
125
250
500 1000 2000 4000 8000
+4
+5
+5
+3
0
-12
-23
-34
*DRT
**DRTI
TLR
125
125
Medium frequency (Hz)
63
125
250
500 1000 2000 4000 8000
+17
+10
+11
+13
+16
+19
+19
+19
160
160
+5
+6
+3
+2
+1
-10
-23
-33
160
160
+19
+10
+13
+15
+17
+17
+21
+21
200
200
+8
+6
+3
+2
+1
-10
-23
-35
200
200
+18
+8
+12
+15
+15
+17
+19
+21
250
250
+15
+5
+2
+3
0
-10
22
-37
250
250
+17
+9
+13
+16
+16
+17
+19
+20
315
315
+19
+7
+2
+3
0
-11
-23
-36
315
315
+16
+7
+13
+14
+16
+15
+18
+20
400
400
+24
+7
0
+1
0
-11
-23
-37
400
400
+13
+7
+15
+13
+15
+14
+19
+21
Tol. ± 3 dB
* DRT 125-200
** DRTI 125-400
Tol. ± 3 dB
* DRT 125-200
** DRTI 125-400
The soundlevel is applicable at an equivalent sound
absorption area of 10 m2.
Sound power level: LW [dB]
Sound level: LA [dB(A)]
Soundlevel LA [dB(A)] (see diagram 1-6.)
Correction factor: KO[dB]
Correction factor KO[dB] from table 4.
LW = LPA + KO
The sound pressure level LPA dB(A) applies to an equivalent
surface of 10 m2, which corresponds to an attenuation of 4
dB in a 25 m3 room with normal atteunation. Table 6: A few
examples for sound corrections in different type of rooms.
Table 6.
Room volume
Room type
Correction
25 m3
hard
+2 dB
25 m3
attenuated
-2 dB
capacity
150 m
hard
-3 dB
150 m3
normal
-5 dB
150 m3
attenuated
-7 dB
3
15-03-02
Airvent reserves the right to change specifications.
www.airvent.eu
5
DRT/DRTI
Diagram
Diagram 1.
Pa
500
Diagram 2.
DRT 125 / DRTI 125 + TLR 125
Closed damper
30
25
20
Sound level
LA dB(A)
10
50
50
100
35
100
30
20
Sound level
LA dB(A)
10
10
100 Q(l/s)
50
50
300 Q(m3/h)
200
Opened
damper
25
100
100 Q(l/s)
200
300 Q(m3/h)
Diagram 4.
Diagram 3.
Pa
500
Closed
damper
40
Total pressuredrop ∆pt
Total pressuredrop ∆pt
35
10
DRT 160 / DRTI 160 + TLR 160
Opened
damper
40
100
Pa
500
DRT 200 / DRTI 200 + TLR 200
Pa
500
DRTI 250 + TLR 250
Closed damper
35
100
40
Total pressuredrop ∆pt
Total pressuredrop ∆pt
Closed
damper
40
30
25
20
Opened
damper
35
30
100
25
20
Opened
damper
Sound level
LA dB(A)
10
50
10
50
6
100
100 Q(l/s)
200
Sound level
LA dB(A)
10
50
300 Q(m3/h)
250 Q(l/s)
250
Airvent reserves the right to change specifications.
www.airvent.eu
500
750
Q(m3/h)
15-03-02
DRT/DRTI
Diagram 6.
Diagram 5.
Pa
500
DRTI 315 + TLR 315
Pa
500
DRTI 400 + TLR 400
Closed damper
Closed
damper
35
100
Opened
damper
30
25
20
Total pressuredrop ∆pt
Total pressuredrop ∆pt
40
Opened
damper
40
100
35
30
25
20
Sound level
LA dB(A)
10
50
250 Q(l/s)
250
500
750
500 Q(l/s)
500
1000
1500
Q(m3/h)
Specification
Ordering code:
DRT
Product name:
DRT
Gypsum ceiling:
Standard modular ceilings:
Size:
10
100
Q(m3/h)
Specification
Sound level
LA dB(A)
X
XXX
I
DRT 125
160
200
DRTI 125
160
200
250
315
400
Example: DRT 125
DRTI 315
Ordering code:
TK
Product name:
TK
Size:
Size:
XXX-XXX
125-100
160-125
200-160
250-200
315-250
400-315
160-100
200-125
250-160
315-200
400-250
Example: TK 160-125
TK 400-250
Specification
Ordering code:
TLR XXX
Product name:
TLR
Size:
125
160
200
250
315
400
Example: TLR 125
15-03-02
Airvent reserves the right to change specifications.
www.airvent.eu
7