NORDexternal External louvres - .NET Framework

NORDexternalExternal louvres

www.etsnord.com2 RDT-09-1021

® NORDexternal

Contents

RVExternal louvre

3

RVTExternal louvre

6

RVSExternal louvre

8

RVAExternal louvre

10

RVUKExternal louvre

12

RVRSnow shield

15

RVLUSnow shield

18

RVCCombi air grid

20

NPCExhaust nozzle

22

RVD Outdoor intake/exhaust grille23

RVDVOutdoor exhaust grille29

RVDSOutdoor intake grille31

RVKNon-return damper

33

MSLSound attenuationlabyrinth 35

3Images are for illustrative purposesWe reserve the right to make changes RDT-09-1021

® NORDexternal | RV

RV is an external louvre designed to protect fresh air and extract air openings of ventilation systems. RV provides effective protection against water penetration with low pressure loss. Resistance to water penetration tested according to EUROVENT 2/5 standard.

ApplicationSuitable for supply and exhaust air.Good resistance to water penetration and low pressure loss make it especially well suited for fresh air openings. The grille is manufactured of galvanized steel and powder coated (RAL 7000).Can also be manufactured of other materials, e.g. alumin-ium, copper, stainless steel or acid-proof steel.

Structure and dimensionsThe grille consists of three structural parts:

1. mounting frame2. mesh 3. removable louvre

The louvre's corners are welded waterproof.RV louvres are produced for openings with various sizes. Standard louvres are rectangular. Triangular grilles are available on special order.Standard sizes manufactured every 50 mm for length and width. Minimum size 200x200 mm. Louvres larger than 1200x1500 mm are manufactured in modules.Dimensions B and H are the nominal sizes of the louvre. The tolerances of B and H are +0/-5 mm.

RV External louvre

B + 75H

+ 7

560

8

(B-5

) x (H

- 5

)

40

H+7

5

B+75 40 68

(B-5

) x (H

-5)

8

3 2 1

B+75

H+7

5 d

80

(B

-5)x

(H-5

)

(B-5

) x (H

-5)

Ød

80

H+7

5

B+75 8


®

Technical dataRV external louvre have been tested according to the Eurovent 2/5 standard. The test results prove that the louvre has an excellent resistance to water penetration and low pressure loss.According to Eurovent, the maximum air flow velocity at the front surface of the louvre is 2,7 m/s, and water resistance is 98%.

0

10

20

30

40

50

0 1 2 3 4 5

Ero

tusa

ste

%

Ilman nopeus (m/s)

Resistance to snow penetration

RV_takistus_ohuvotul.xls

Kiirus (m/s)

Rõh

ukad

u (P

a)

0,2 0,3 0,4 0,5 0,60,7 1 2 3 4 551

23

5710

2030

5070100

200

90

92

94

96

98

100

0,5 1,5 2,5 3,5 4,5 5,5

%

m/s

Resitance to water penetration

Intake air pressure loss

%

Air velocity (m/s)

%

Air velocity (m/s)

Pre

ssur

e dr

op (P

a)

Air velocity (m/s)

NORDexternal | RV


®

Product codes

Marking

MaterialStandard material galvanized steel (Z275+RAL7000)ZM – zinc-magnesium coated steel (ZM310)H – acid-proof steelAl – aluminiumZn – uncoated galvanized steelCu – copper

Size BxH

RAL Color codeRAL colour: if other than standard colour

Example: RV 1200x1000

Triangular grilles (dimensions with clarification):1000 x 600 (triangle) – Equilateral triangle, width 1000 mm and height 600 mm

RV - H - BxH - RAL 3020

NORDexternal | RV


®

RVT is an external louvre designed to protect fresh air and extract air openings of ventilation systems. RVT provides effective protection against water penetration.

ApplicationSuitable for supply and exhaust air.Good resistance to water penetration and low pressure loss make it especially well suited for fresh air openings. The louvre is manufactured of galvanized steel and powder coated.Can also be manufactured of other materials, e.g. alumin-ium, copper, stainless steel or acid-proof steel.

Structure and dimensionsThe louvre consists of three structural parts:


Corners are welded waterproof.External louvre are produced for openings with various sizes. Standard sizes manufactured every 50 mm for length and width. Minimum size 200x200 mm. Louvres larger than 1200x1200 mm are manufactured in modules.Dimensions B and H are the nominal sizes of the louvre. The tolerances of B and H are +0/-5 mm.

RVT External louvre

B+75

40 (B-5) x (H-5)

3 2 1

80 8

H

+75

B+75

40 (B-5) x (H-5)

3 2 1

80 8

H

+75

NORDexternal | RVT


®

Technical dataRVT external louvres have been tested according to the SFS 5428 standard. The test results prove that the louvre has an excellent resistance to water penetration.Air flow velocity at the front surface of the grille should not exceed 2 m/s.

Product codes

Marking

MaterialStandard material galvanized steel (Z275+RAL7000)ZM – zinc-magnesium coated steel (ZM310)H – acid-proof steelZn – uncoated galvanized steel

Size BxH


Example: RVT 600x600 External louvre

Kiirus (m/s)R

õhuk

adu

(Pa)

0,5 0,6 0,7 0,8 0,9 1 2 3 457

10

20

30

5070

100

200

Pre

ssur

e dr

op (P

a)Air velocity (m/s)

RVT - H - BxH - RAL 3020

NORDexternal | RVT


® NORDexternal | RVS

RVS is designed for protection of external ventilation openings. The grille has a low pressure drop. Due to the low pressure drop the RVS louvre is suitable for smoke extraction systems.

Application Normally used for exhaust air.The louvre is manufactured of galvanized steel and powder coated.Can also be manufactured of other materials, e.g. aluminium, copper, stainless steel or acid-proof steel.

Structure and dimensions The louvre consists of three structural parts:


Corners are welded waterproof.External louvres are produced for openings with various sizes. Standard sizes manufactured every 50 mm for length and width. Minimum size 200x200 mm. Louvres larger than 1200x1200 mm are manufactured in modules.Dimensions B and H are the nominal sizes of the louvre. The tolerances of B and H are +0/-5 mm.

23 1

H+7

5

(B-5

) x (H

-5)

40 8 B+75 73

23 1

H+7

5

(B-5

) x (H

-5)

40 8 B+75 73

RVS External louvre


®

Technical dataRVS external grilles have been tested according to the SFS 5428 standard.

Poduct codes

Marking


Size BxH


Example: RVS 600x600 External louvre

Kiirus (m/s)R

õhuk

adu

(Pa)

2 3 4 5 6 7 8 9 10 202023

5710

2030

5070100

200

Pre

ssur

e dr

op (P

a)Air velocity (m/s)

RVS - H - BxH - RAL 3020

NORDexternal | RVS


®

Louvre for supply and exhaust air. Also suitable for natural ventilation.

Structure and dimensionsRVA louvre is manufactured of cast aluminium and equipped with a mesh. Dimensions Ø 100–315 are painted RAL 9006 color and other louvres uncoated. Other colours available on request.

Nominal size Ød

ØE C Afm² Weight

100 125 16 0,005 0,15125 150 16 0,008 0,15160 185 16 0,014 0,25200 225 16 0,022 0,4250 275 16 0,034 0,8315 355 35 0,037 1,8400 440 35 0,085 3,0500 540 35 0,103 5,1630 730 50 0,158 6,0

Nominal size BxH B1x H1 Af

m² Weight

150x150 180x180 0,014 0,65200x200 230x230 0,025 0,7

RVA External louvre

C

d

3

E

5

B x

H

15

H1

B1

C

d

3

E

5

B x

H

15

H1

B1

NORDexternal | RVA


®

Technical data

Product codes

Example: RVA 150x150

RVA_õhuvõtt.grf

Õhuhulk qv (l/s)

Rõh

ukad

u p

t (Pa

)

10 20 30 40 50 70 100 200 300 500 700 1000 200010

20

30

40

50

60

708090

100

Intake air

125

150x

150

160

200

250

315

400

100

500

630

Pre

ssur

e dr

op (P

a)

Air flow (l/s)

RVA_valja.grf

Õhuhulk qv (l/s)

Rõh

ukad

u p

t (Pa

)

10 20 30 40 50 70 100 200 300 500 700 1000 2000 300010

20

30

40

50

60

708090

100

Exhaust air

Pre

ssur

e dr

op (P

a)

Air flow (l/s)

125

150x

150

160

200

250

315

400

100

500

630

Marking

Nominal sizeRectangular - BxHCircular - Diameter d

RAL Color codeStandard: Ø 100–315 on RAL 9006RAL color: if other than standard color

RVA - BxH - RAL 3020

NORDexternal | RVA


®

External louvre with electric heating for aggressive weather conditions.

• With labyrinth structure• Good resistance in stormy weather• Removable front and back louvres• Back louvre equipped with self-regulating thermal

cable (operating voltage 230 V)

OperationThe front louvre distributes air flow evenly on the grille. Snow trapped to the back louvre melts and flows along the grille surface to a draining pipe. The draining pipe can be connected to sewer (sewer connection R3/4" with outer thread).

Structure and dimensionsRVUK external louvre has 3 structural parts:

1. front louvre2. back louvre3. mounting frame

Front louvre and mounting frame are manufactured of gal-vanized steel sheet and powder coated (standard colour RAL 7000). Back louvre is manufactured of aluminium pro-files and is equipped with a self-regulating thermal cable ELSR-N-40-2-AO (Eltherm).Can also be manufactured of aluminium, stainless steel or acid-proof steel.Can be produced for all sizes of openings. Standard sizes every 100 mm. Minimum size 500x500 mm. The area of the maximum size manufactured in one part is 1,0 m2. Larger units are manufactured in modules with a connection box in each module.

H+7

7

B+77 40

äravooluotsik

(B-5

) x (H

-5)

170

9

1

3

2

H+7

7

B+77 40

äravooluotsik

(B-5

) x (H

-5)

170

9

1

3

2

RVUK External louvre

NORDexternal | RVUK

sewer connection


®

Pressure drop

Heating powerRVUK louvres maximum heating power of the thermal cable is 2100 W/m2 (16A), when outside temperature is –18 °C. Operating voltage 230 VAC / 50 Hz. Each module is connected to the louvre separately under 16A fuse.

RVUK Resistance to water penetration

RVUK_takistus_2.grf

Kiirus (m/s)

Rõh

ukad

u (P

a)

0,4 0,5 0,6 0,7 0,8 0,9 1 2 3 423

5710

2030

5070100

200

Lw18 dB(A)

Lw10 dB(A)

Lw24 dB(A) Lw29 dB(A)

Lw35 dB(A) Lw39 dB(A)

Lw42 dB(A)

Lw66 dB(A)

Lw77 dB(A)

Air velocity (m/s)

Pre

ssur

e dr

op (P

a)

RVUK_kyte_kW.grf

Küttevõimsus (kW/m2)

T VÕ

(C)

1,4 1,6 1,8 2 2,2 2,4-30-25-20-15-10-505101520

Heating power (kW/m2)

Sup

ply

air

(C°)

RVUK_veeekindlus.grf

Kiirus (m/s)

Veek

indl

us %

0 1 2 3 4 595

96

97

98

99

100

Air velocity (m/s)

%

NORDexternal | RVUK


®

Product codes

Marking


Size BxH


Example: RVUK 1200x1000

Installation instructions First fix the mounting frame. Mounting frame dimensions are 5 mm smaller than the unit's nominal dimensions. Then install the back louvre and front louvre to the frame with screws. For electrical and drainage connections, at least 100 mm free space must be left behind the unit.Drainage pipe with sewer connection 1/2'' x 3/8'' with outer thread.

Electrical connectionElectrical connections shall be made in IP65 connection box (included). In the modular construction there is a separate connection box in each module. Every module has to be connected separately under 16A fuse. This must be taken into account when electrical drawings are being drafted.

RVUK - H - BxH - RAL 3020

NL

~1

NORDexternal | RVUK


®

RVR snow shield is designed to protect supply air openings. Very good resistance to water and snow penetration.

ApplicationThe RVR snow shield is designed for protecting the air intake holes of ventilation systems preventing snow and water from getting into the building. Snow shield is with labyrinth design and air intake is carried out also through the openings on both sides of the shield. Snow and water are efficiently separated from the air flow and drained through an openings in the bottom of the shield. Snow shield is made of hot galvanized steel and the surface is finished with powder coating. Can also be manufactured of stainless steel or acid-proof steel.

Structure and Dimensions Snow shields are manufactured for all sizes of rectangular supply air openings.Minimum size 800x800 mm (spacing 100 mm). Sizes over 2000x2000 mm are built in modules.Recommended depth C is 400 mm (min 200 mm and max 500 mm). The wall opening must be at least 400 mm narrower and 400 mm shorter than the grate (B-400)x(H-400).Possibility to deliver in modules.

RVR Snow shield

min 100 min 100

AA

B

H

c

H+6

0

B 100

SECTION A-A

60

80

H/2

H

80

B1+100

B

B2

b

b A

b-b

B1

NORDexternal | RVR


®

Technical data The better results of RVR snow shield resistance to water and snow penetration can be achieved when the louvre face velocity does not exceed 0,6 m/s.

Selection diagramExample:Airflow qv = 1000 l/s ja Desired face velocity v =0,6 m/s.Looking at the diagram intake air pressure drop is Δpt = 38 Pa.From the selection diagram we get that the surface area is A0 = 1,8 m2

Therefore an appropriate shield isRVR 1000x1000x400.

Snow shield's RVR 1000x1000x400 max airflow?

Surface area: S=(B+(2*C))*HS=(1,0 m+(0,4 *2)*1,0 m = 1,8 m2

Maximum airflow: 0,6 m/s *1,8 m2 = 1,08 m3/s = 1080 l/s

min 100 min 100

max 2,0 m/s

~0,6 m/s

RVR_veeekindlus.grf

Kiirus (m/s)

Veek

indl

us %

0 1 2 3 4 595

96

97

98

99

100

RVR_Pa.grf

Kiirus qv (m/s)

Rõh

ukad

u p

t (Pa

)

0,1 0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 11

2

345

7

10

20

304050

70

100

200

Resistance to water penetration

Pre

ssur

e dr

op (P

a)

Air velocity (m/s)

%

Air velocity (m/s)

Intake air pressure drop

Ao (m2)0,1

Õhu

hulk

qv

(100

0 m

3 /h)

0,2 0,3 0,4 0,5 0,7 1 2 3 4 650,36

0,4

0,50,60,7

1

2

3

4

5

76

10,8

0,2

0,3

0,4

0,6 0,5

(l/s

)

100

200

300

400

500600700

1000

2000

3000

Airfl

ow q

v

NORDexternal | RVR


®

Product marking

Example: RVR 1200x1000x400

Design and InstallationFollow these instructions when planning the installation and during the actual installation of the shield:1. Snow shield should be placed to the north side of the building, if possible, in order to avoid thermal

stress caused in summer.2. Snow shield must be of an appropriate size. The recommended flow rate is 0,6 m/s measured from the

maze surface. Scheme S = (B + (2 x C)) × H ;[m²] is applied for calculating the surface area.3. Distance between the inlet and outlet louvres must be enought that outgoing and incoming air would

not mix.4. The height of the shield from the ground must be over 2 meters. 5. In roof applications the shield must be installed at least at the height of 0,9 meters, or otherwise

protected from snow.6. Location of the air inlet shield should be placed as far as possible from vent output holes, trash barrels,

chimneys and other sources of possibly polluted air.7. When designig you must take into account also other general building regulations.

InstallationWhen installing a snow shield, make sure that this is attached to the support structure. The brackets must be selected according to the wall material. If the louvre consists of four or more modules, additional vertical supports must be used. A structural beam or wooden beam suitable as an additional support is attached to the junctions of the module frame and to the wall structure of the building.The opening must be in the middle of the snow shield.See also RVR snow shield installation instructions.For best results, we recommend that the ventilation chambers be equipped with a drain connection and, if necessary, an electric defrost.

Marking

MaterialGalvanized steel+paint as standard, not markedZM – zinc-magnesium coated steelZM – zinc-magnesium coated steelH – acid-proof steelZn – uncoated galvanized steel

Width B x Height H Width can be supplied in 100 mm increments

Depth C200, 300, 400, 500

RAL Color CodeRAL color: if other than standard color

RVR - ZM - BxH - C - RAL 7000

NORDexternal | RVR


®

The RVLU snow shield is designed for the protection of supply air openings from snow.The shield has good water and snow barrier properties.RVLU grilles meet the requirements of the LVI-RYL and SFS 5358 standards.

ApplicationThe RVLU snow shield is designed to prevent penetration of snow and water in the building. The design of the snow shield is of labyrinth-type. Snow and water are efficiently separated from the air flow and drained through an openings in the bottom of the shield. Snow shield is made of hot galvanized steel and the surface is finished with powder coating. Can also be manufactured of stainless steel or acid-proof steel.

Structure and dimensions Snow shields are to be installed in front of rectangular supply air openings of various sizes. The minimum size of the shield is 800×800 mm. Shields sizes over 2000×1800 mm are built in modules.The tolerance of B and H measures is +0/-5 mm.

Technical dataThe better results of RVLU snow shield resistance to water and snow penetration can be achieved when the louvre face velocity does not exceed 0,6 m/s.

RVLU Snow shield

H+7

5 B+75

8

(B-5)x(H-5)

102

RVUK_veeekindlus.grf

Kiirus (m/s)

Veek

indl

us %

0 1 2 3 4 595

96

97

98

99

100

RVLU_Pa.grf

Kiirus (m/s)

Rõh

ukad

u (P

a)

0,2 0,3 0,4 0,5 0,6 0,7 0,8 0,9 1 21

23

5710

2030

5070100

200

Resistance to water penetration Intake air pressure drop

Pre

ssur

e dr

op (P

a)

Air velocity (m/s)

%

Air face velocity (m/s)

NORDexternal | RVLU


®

Product codes

Marking

MaterialStandard material galvanized steel (Z275+RAL7000)ZM – zinc-magnesium coated steel (ZM310)Al –aluminiumH – acid-proof steelZn – uncoated galvanized steel

Size BxH


Example: RVLU 1200x1000

RVLU - H - BxH - RAL 3020

NORDexternal | RVLU


®

RVC – a combined supply and exhaust air grille designed to be installed in an external wall.

• Compact design enables you to bring supply and exhaust air to the same external surface.

• Long exhaust flow prevents polluted air pen-etrate in the supply air zone.

• Supply air chamber separates efficiently the devices from external air.

• Low resistance reduces energy consumption of ventilators.

• Galvanised steel housing finished with pow-der coating ensures high weather resistance.

ApplicationRVC-type of grilles are used everywhere where exhaust and supply air has to be solved through an external wall. RVC is an ideal device to solve supply and exhaust air requirements of apartment houses to be renovated.

Structure and dimensions Manufactured as standard of galvanized steelsheet and finished with grey powder coat (RAL 7000). Exhaust air connection with rubber gasket and mesh. It is possible to order a grille based on the location of the exhaust air connection. Exhaust on the right (R) or left side (L).

Nominal size Ød, mm B, mm H, mm H1, mm C, mm E, mm D, mm F, mm Weight,

kg

315 843 550 498 264 214 475 205 10,7

400 1029 659 607 314 263 590 255 16,0

500 1249 812 759 392 324 735 320 24,0

NORDexternal | RVC

RVC-R

max 100 mm

E

H

B

H1

d

D

C

F

RVC Combined supply and exhaust air grill


®

Technical data Intake air - Pressure drop

Exhaust air - Pressure drop - Air flow - Throw

Product codes

Marking Exhaust locationR-on the rightL-on the left

Nominal size Color code

RAL color: if other than standard color

Installation• Supply and exhaust air pipes are led parallel on the external surface of the wall.• RVC is installed outside so that the exhaust duct is connected to the internal fitting of the exhaust cou-

pling and the supply air pipe remains in the supply air chamber.• Distance between supply and exhaust should be at least 100 mm.• RVC is fixed to the wall in four points with screws (opening size Ø 7 mm).

RVC_OV.grf

Õhuhulk qv (l/s)

Rõh

ukad

u (P

a)

100 200 300 400 500 600 700 800 10005

678

10

20

30

40

50

607070 315 400 500

Pre

ssur

e dr

op (P

a)

Air flow (l/s)

RVC_VV_Zenner.grf

Õhuhulk qv (l/s)

Rõh

ukad

u (P

a)

100 200 300 400 500 600 700 1000 20003

4

567

10

20

30

40

506070

100 315 400

500

6,0

11,5

8,9

16,1

12,2

19,2

25

30

35

L0,5 (m)

LW, dB(A)

RAL7000RVC ØdR

NORDexternal | RVC

Pre

ssur

e dr

op (P

a)

Air flow (l/s)


®

• Long exhaust flow prevents polluted air penetrate in the supply air zone

• Low resistance reduces energy consumption of venti-lators

• Galvanised steel housing finished with powder coat-ing ensures high weather resistance

ApplicationNPC is an ideal device to solve exhaust air requirements of apartment houses to be renovated.

Structure and dimensions Manufactured as standard of galvanized steelsheet and finished with grey powder coat (RAL 7000). Exhaust air connection with rubber gasket and mesh.

Nominal size Ød, mm D, mm L, mm E, mm Weight,

kg

125 190 181 112 0,55

160 235 255 163 0,7

Technical data Exhaust air - Pressure drop - Air flow - Throw

Product codes

Marking Nominal size Color code

Example: NPC 160 RAL7000

NPC Exhaust nozzle

D

d

L

E

NPC_VV.grf

Õhuhulk qv (l/s)

Rõh

ukad

u (P

a)

10 20 30 40 50 60 70 80 100 2001

2

345

7

10

20

304050

70

100 125 reguleerosaga 125160

2,3

4,5

3,0

5,4

4,0

7,4

L0,5

Throw

NPC_125.grf

Õhuhulk (l/s)

Õhu

kiiru

s (m

/s)

5 6 7 8 9 10 20 30 40 50 60 70 800,4

0,50,60,7

1

2

3

4

567

10 NPC 125 reguleerosaga

NPC 125

1,7 m

3,0 m

0,9 m

1,81 m

L0,5

Throw

30

35

25

LW, dB(A)

Air

velo

city

(m/s

)

Air flow (l/s)

Pre

ssur

e dr

op (P

a)

Air flow (l/s)

125 with regulating part 125 125 with regulating part

RAL7000NPC Ød

NORDexternal | NPC


®

• Unique and stylish outdoor intake/exhaust grill available in all RAL colors• Compact and flat - fits easily on all exterior surfaces• Focused exhaust flow pattern provides 100% elimination of intake-exhaust cross contamination• Adjustable exhaust velocity - easy to maintain the required minimum >5 m/s airflow velocity for small air

volumes• Air intake from the underside prevents entry of water or snow into the supply duct• Low pressure drop - reduces fan energy consumption• Galvanised steel housing with powder coating ensures long-term durability • Removable front panels allow inversion of the exhaust connection• Registered design No 007972823-0002• RVD 125L and RVD 160 are certified products, No EUFI29-20003237-C/EN

Application• RVD-type grilles are used anywhere intake and

exhaust both need to penetrate the same wall surface.

• RVD is the ideal solution for residential buildings where ventilation is local to each apartment.

Structure and dimensions In standard configuration, RVD grilles are manufactured from galvanized steel and finished with a grey RAL 7000 powder coating. RVD is optionally available in all RAL- series colors.Exhaust duct connections are provided with rubber gasket and mesh screen.

Product Ød, mm B, mm H, mm C, mm E, mm F, mm G, mm Weight, kg

RVD 125 125 433 198 86 31 39 106 2,0RVD 125L 125 561 233 101 39 39 113 2,5RVD 160 160 591 233 101 39 39 125 3,0RVD 200 200 681 273 121 43 39 145 4,0RVD 250 250 849 323 144 51 42 170 5,6RVD 250L 250 949 363 161 60 42 220 6,5

RVD Outdoor wall-mounted combined intake/exhaust grille

B

E

H

C

Ød

F

G

NORDexternal | RVD


®

Technical dataPressure drop - Airflow

RVD - Intake air

RVD-OV.grf

Õhuhulk qv (l/s)

Rõh

ukad

u p t

(Pa)

20 30 40 50 60 70 80 90100 200 2505

6

789

10

20

30

40

50 200 250125 160

30

40

45

125L

2 m/s

250LLwA (dB)A

35

Reccomended

Pre

ssur

e dr

op (P

a)

Airflow (l/s)

NORDexternal | RVD

Õhuhulk qv (l/s)

Rõh

ukad

u p t

(Pa)

10 20 30 40 50 60 70705

6

789

10

20

30

40

50 s=1 s=3

25

30

35

40

s=2

5 m/s

Lw (dB)A

RVD 125L - Exhaust air

Pre

ssur

e dr

op (P

a)

Airflow (l/s)

Exhaust flowspeed

Õhuhulk qv (l/s)

Rõh

ukad

u p t

(Pa)

5 6 7 8 9 10 20 30 40 505

6

789

10

20

30

40

50 s=1 s=3

25

30

35

40

s=2

Lw (dB)A

5 m/s

RVD 125 - Exhaust air

Pre

ssur

e dr

op (P

a)

Airflow (l/s)

Õhuhulk qv (l/s)

Rõh

ukad

u p t

(Pa)

30 40 50 60 70 80 90 100 15010

20

30

40

50

60

708090

100 s=1 s=2 s=3

30

35

40

45

5 m/s

LwA (dB)A


Pre

ssur

e dr

op (P

a)

Airflow (l/s)

Exhaust flowspeed

Õhuhulk qv (l/s)

Rõh

ukad

u p t

(Pa)

10 20 30 40 50 60 70 805

6

789

10

20

30

40

50 s=1 s=3

25

35

40

s=2

5 m/s

Lw (dB)A

30


Pre

ssur

e dr

op (P

a)

Airflow (l/s)

Exhaust flowspeed

Exhaust flowspeed

Reccomended

Reccomended

ReccomendedReccomended


®

Acoustic data

Lw = LwA + Kokt

RVD, intake airSound level correction factor Kokt (dB)

Mean frequency of octave band (Hz)63 125 250 500 1k 2k 4k 8k

RVD 125 -3 -2 -3 -2 -6 -15 -15 -12RVD 125L 0 -3 -1 -1 -6 -11 -15 -14RVD 160 0 -3 -1 -1 -6 -11 -15 -14RVD 200 -7 -6 -3 -1 -5 -12 -15 -20RVD 250 -1 1 2 -2 -6 -10 -15 -22

RVD 250L 0 0 2 -1 -4 -9 -15 -21

RVD, exhaust airSound level correction factor Kokt (dB)

Mean frequency of octave band (Hz)Position 63 125 250 500 1k 2k 4k 8k

RVD 125s = 1 -6 -6 -6 -2 -8 -12 -15 -15s = 2 -4 -3 -3 -2 -8 -13 -15 -15s = 3 -3 -1 -2 -3 -9 -15 -16 -15

RVD 125Ls = 1 -2 -4 -3 -3 -6 -10 -14 -15s = 2 0 0 0 -1 -6 -12 -15 -16s = 3 1 -1 1 -1 -9 -15 -16 -16

RVD 160s = 1 -3 -3 -3 -2 -7 -12 -16 -15s = 2 0 -1 -1 -1 -7 -13 -16 -16s = 3 0 0 0 -1 -9 -14 -16 -16

RVD 200s = 1 -1 -2 1 -1 -6 -13 -22 -27s = 2 0 0 2 -1 -6 -14 -23 -27s = 3 -1 -1 2 -1 -5 -13 -22 -25

RVD 250s = 1 -1 -3 -5 -5 -5 -6 -12 -19s = 2 1 1 0 -2 -6 -9 -16 -22s = 3 2 2 1 -1 -6 -12 -22 -24

RVD 250Ls = 1 -1 -2 -3 -5 -5 -6 -10 -19s = 2 0 1 0 -0 -6 -10 -16 -20s = 3 0 2 0 -0 -6 -11 -20 -22

Õhuhulk qv (l/s)

Rõh

ukad

u p t

(Pa)

30 40 50 60 70 80 90 100 20010

20

30

40

50

60

708090

100 s=1 s=2 s=3

5 m/s

45

40

35

30

LwA (dB)A

RVD 250 - Exhaust airP

ress

ure

drop

(Pa)

Airflow (l/s)

Exhaust flowspeed

RVD-250L-VV.grf

100 s=1 s=2

90 s=3LwA (dB)A

8070

60 45

5040

40

3530

30

205 m/s

1050 60 70 80 90 100 200 330000

Õhuhulk qv (l/s)

Rõh

ukad

u p t

(Pa)

RVD 250L - Exhaust air

Pre

ssur

e dr

op (P

a)

Airflow (l/s)

exhaust flowspeed

NORDexternal | RVD

Reccomended Reccomended


® NORDexternal | RVD

Sound attenuation

RVD, intake airSound attenuation Dokt (dB)

63 125 250 500 1k 2k 4k 8kRVD 125 19 13 8 8 7 7 5 5

RVD 125L 17 12 6 8 6 5 5 6RVD 160 17 12 6 8 6 5 5 6RVD 200 16 10 5 6 4 4 5 5RVD 250 13 8 3 4 4 4 4 5

RVD 250L 12 7 3 4 4 3 4 5

RVD, exhaust airSound attenuation Dokt (dB)

Position 63 125 250 500 1k 2k 4k 8k

RVD 125s = 1 24 16 12 8 7 6 5 7s = 2 22 16 11 9 7 6 5 5s = 3 21 14 11 7 7 4 4 6

RVD 125Ls = 1 22 15 12 8 7 6 5 6s = 2 21 15 11 8 6 6 4 5s = 3 21 14 11 7 7 4 4 6

RVD 160s = 1 19 14 10 7 7 5 5 5s = 2 19 13 9 6 6 5 4 5s = 3 18 11 9 6 4 5 5 5

RVD 200s = 1 19 12 8 5 5 4 6 6s = 2 18 11 8 4 4 4 5 5s = 3 17 10 7 4 3 3 5 5

RVD 250s = 1 15 11 7 4 4 6 7 7s = 2 14 10 7 3 4 5 6 6s = 3 15 10 6 3 3 5 5 5

RVD 250Ls = 1 15 10 6 3 3 6 6 5s = 2 14 9 5 3 3 4 6 5s = 3 14 9 5 3 3 4 5 5

Airflow pattern

RVD 125, top view

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7-1,5 -1 -0,5 0 0,5 1

s=1,16 l/s

[m] [m]

0,5 m/s

0,5 m/s

[m]

[m]

s=3 29 l/s

s=3,29 l/s

s=1 16 l/s

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7-1,5 -1 -0,5 0 0,5 1

s=1,16 l/s

[m] [m]

0,5 m/s

0,5 m/s

[m]

[m]

s=3 29 l/s

s=3,29 l/s

s=1 16 l/s

RVD 125, side view

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7-1,5 -1 -0,5 0 0,5 1

s=1,18 l/s

[m] [m]

0,5 m/s

0,5 m/s

[m]

[m]

s=3, 42 l/s

s=3,42 l/s

s=1, 18 l/s

RVD 125L, side view

RVD 125L, top view

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7-1,5 -1 -0,5 0 0,5 1

s=1,18 l/s

[m] [m]

0,5 m/s

0,5 m/s

[m]

[m]

s=3, 42 l/s

s=3,42 l/s

s=1, 18 l/s


®

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7-1,5 -1 -0,5 0 0,5 1

s=3 63l/s

[m]

[m]

[m]

0,5 m/s

0,5 m/s

[m]

s=3, 63 l/ss=1,

31 l/s

s=131 l/s

RVD 200, side view

RVD 160, top view

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7-1,5 -1 -0,5 0 0,5 1

s=3, 48 l/s

s=1, 24 l/s

s=3,48 l/s

s=124 l/s

[m]

[m]

[m]

0,5 m/s

0,5 m/s

[m]

RVD 200, top view

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7-1,5 -1 -0,5 0 0,5 1

s=3 63l/s

[m]

[m]

[m]

0,5 m/s

0,5 m/s

[m]

s=3, 63 l/ss=1,

31 l/s

s=131 l/s

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7-1,5 -1 -0,5 0 0,5 1

s=3, 48 l/s

s=1, 24 l/s

s=3,48 l/s

s=124 l/s

[m]

[m]

[m]

0,5 m/s

0,5 m/s

[m]

RVD 160, side view

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7

-1,5 -1 -0,5 0 0,5 1

[m]

[m]

[m]

0,5 m/s

0,5 m/s

[m]

8 9

8

9

s=140 l/s s=3

90 l/s

s=140 l/s

s=390 l/s

RVD 250, side view

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7

-1,5 -1 -0,5 0 0,5 1

[m]

[m]

[m]

0,5 m/s

0,5 m/s

[m]

8 9

8

9

s=177 l/s s=3

136 l/s

s=3136 l/s

s=177 l/s

1,5 2

RVD 250L, side view

RVD 250, top view

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7

-1,5 -1 -0,5 0 0,5 1

[m]

[m]

[m]

0,5 m/s

0,5 m/s

[m]

8 9

8

9

s=140 l/s s=3

90 l/s

s=140 l/s

s=390 l/s

RVD 250L, top view

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7

-1,5 -1 -0,5 0 0,5 1

[m]

[m]

[m]

0,5 m/s

0,5 m/s

[m]

8 9

8

9

s=177 l/s s=3

136 l/s

s=3136 l/s

s=177 l/s

1,5 2

NORDexternal | RVD


® NORDexternal | RVD

Marking

Example: RVD 160

InstallationSee RVD installation instructions.

ProductRVD - intake and exhaust air grille

Nominal size

RAL Color CodeRAL color: if other than standard color (standard color RAL 7000, light grey)

RVD - d - RAL 7000


® NORDexternal | RVDV

• Unique and stylish outdoor exhaust grill available in all RAL colors

• Compact and flat - fits easily on all exterior surfaces• Focused exhaust flow pattern• Low pressure drop - reduces fan energy consumption• Galvanised steel housing with powder coating ensures

long-term durability

ApplicationRVDV is an ideal device to solve exhaust air requirements of apartment houses to be renovated.

Structure and dimensions In standard configuration, RVDV grilles are manufactured from galvanized steel and finished with a grey RAL 7000 powder coating. RVDV is optionally available in all RAL- series colors.Exhaust duct connections are provided with rubber gasket and mesh screen.

Product Ød, mm B, mm H, mm C, mm E, mm F, mm Weight, kgRVDV 125 125 244 198 86 31 39 1,5RVDV 160 160 299 233 101 39 39 2,0RVDV 200 200 348 273 121 43 39 2,8RVDV 250 250 408 323 144 51 42 3,8

RVDV 250L 250 507 362 161 60 42 5,1

Technical dataExhaust air - Pressure drop - Airflow

H

Ød

F

E

B C

RVDV-VV.grf

Õhuhulk qv (l/s)

Rõh

ukad

u p t

(Pa)

20 30 40 50 60 70 80 90 100 20010

20

30

40

50

60

708090

100 125 160 200 250

35

40

45

30

25

Lw (dB)A

5 m/s

Pre

ssur

e dr

op (P

a)

Airflow (l/s)

exhaust flowspeed

RVDV Outdoor wall-mounted exhaust grille


®

Acoustic data

Lw = LwA + Kokt

RVDV, exhaust air

Sound level correction factor Kokt (dB)Mean frequency of octave band (Hz)

63 125 250 500 1k 2k 4k 8kRVDV 125 1 -1 1 -1 -9 -15 -16 -16RVDV 160 0 0 0 -1 -9 -14 -16 -16RVDV 200 -1 -1 2 -1 -5 -13 -22 -25RVDV 250 2 2 1 -1 -6 -12 -22 -24

RVDV 250L 0 2 0 -0 -6 -11 -20 -22

Sound attenuation

RVDV, exhaust air

Sound attenuation Dokt (dB)

63 125 250 500 1k 2k 4k 8kRVDV 125 21 14 11 7 7 4 4 6RVDV 160 18 11 9 6 4 5 5 5RVDV 200 17 10 7 4 3 3 5 5RVDV 250 15 10 6 3 3 5 5 5

RVDV 250L 14 9 5 3 3 4 5 5

Airflow pattern

Marking

Example: RVDV 160

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7-1,5 -1 -0,5 0 0,5 1

42 l/s

42 l/s

[m] [m]

[m]

[m]

0,5 m/s

0,5 m/s

0 1 2 3 4 5 6 7-1,5

-1

-0,5

0

0,5

1

0

1

2

3

4

5

6

7-1,5 -1 -0,5 0 0,5 1

48 l/s

48 l/s

[m]

[m]

[m]

[m]

0,5 m/s

0,5 m/s

RVDV 125, side view RVDV 160, side view

ProductRVDV - exhaust air grille

Nominal size


RVDV - d - RAL 7000

NORDexternal | RVDV


® NORDexternal | RVDS

• Unique and stylish outdoor intake grill available in all RAL colors

• Compact and flat - fits easily on all exte-rior surfaces

• Air intake from the underside prevents en-try of water or snow into the supply duct

• Galvanised steel housing with powder coating ensures long-term durability

ApplicationRVDS is the ideal solution for residential buildings where ventilation is local to each apartment.

Structure and dimensions In standard configuration, RVDS grilles are manufactured from galvanized steel and finished with a grey RAL 7000 powder coating. RVDS is optionally available in all RAL- series colors.

ProductWall opening

d mm B, mm H, mm C, mm Weight, kgRVDS 125 125 433 198 86 1,6RVDS 160 160 591 233 101 2,5RVDS 200 200 681 273 121 3,4RVDS 250 250 849 323 144 5,0

Technical dataIntake air - Pressure drop - Airflow

RVDS Outdoor wall-mounted intake grille

B

H

C

d

50 125 160 200

40 25045

30

4020

2 m/s

35

10 30987

6LwA (dB)A

520 30 40 50 60 70 80 90 100 200

Õhuhulk qv (l/s)

Rõh

ukad

u p t

(Pa)

Pre

ssur

e dr

op (P

a)

Airflow (l/s)

Reccomended


® NORDexternal | RVDS

Acoustic data

Lw = LwA + Kokt

RVDS, intake airSound level correction factor Kokt (dB)

Mean frequency of octave band (Hz)63 125 250 500 1k 2k 4k 8k

RVDS 125 2 -4 0 -2 -8 -14 -15 -14RVDS 160 0 -3 -1 -1 -6 -11 -15 -14RVDS 200 -7 -6 -3 -1 -5 -12 -15 -20RVDS 250 -1 1 2 -2 -6 -10 -15 -22

Sound attenuation

RVDS, intake airSound attenuation Dokt (dB)

63 125 250 500 1k 2k 4k 8kRVD 125 19 13 8 8 7 7 5 5RVD 160 17 12 6 8 6 5 5 6RVD 200 16 10 5 6 4 4 5 5RVD 250 13 8 3 4 4 4 4 5

Marking

Example: RVDS 160

ProductRVDS - intake air grille

Nominal size


RVDS - d - RAL 7000


® NORDexternal | RVK

RVK is a non-return damper protecting exhaust air openings.

Features:• Prevents air backflow• Protects ventilations systems from rainwater• Easy to install• RVKS can be installed into horizontal or vertical duct

system

ApplicationRVK is to be installed in wall openings. With no air flow, the louvre closes automatically because of gravity to prevent backflow.

Structure and dimensionsRVK and RVKS are constructed of two parts: a frame and a removable louvre. The frame is manufactured of galvanized steel and the louvre blades of aluminium. RVK is with powder coated finish (RAL 7000). RVK has waterproof welding on the corners of the frame. Standard sizes every 100 mm. Minimum size 200x200 mm and maximum 800x1200 mm. Larger louvres are manufactured in modules.

Technical dataRecommended air velocity in ventilation duct is up to 5 m/s.

RVK Non-return damper

B+73

40

H+7

3

B (B

-5) x

(H-5

) 44

H

210

Õhu kiirus (m/s)

Rõh

ukad

u (P

a)

1 2 3 4 5 6 7 8 9 1010

20

30

40

506070

100120

RVK pressure drop

Pre

ssur

e dr

op (P

a)

Air velocity (m/s)


® NORDexternal | RVK

Product codes

Marking

MaterialStandard material galvanized steel (Z275+RAL7000)ZM – zinc-magnesium coated steel (ZM310)Al –aluminiumH – acid-proof steelZn – uncoated galvanized steel

Size BxH


Example: RVK 1200x1000

RVK - H - BxH - RAL 3020


® NORDexternal | MSL

MSL sound labyrinth is designed for sound attenuation in supply and exhaust air openings.

• Excellent noise protection• reduced depth of silencer• relatively small pressure drop• Good wether protection together with RV grille

MSL is used mainly for absorbing technical equipment noise in indriustal premicies.

Material and dimensionsSound labyrinth consists of outer casing and noise reducing cartridges. The casing are made of galvanised sheet metal and provided in one end with a Z-shape strip. The optional sound attenuation material is polyester wool.

Dimension mmWidth B 900, 1300, 1700, 2100, 2500, 2900

Height H 200 ….. 3000

Length L 500, 600

Technical data Sound absorbing

L, mm

Attenuation (dB)Octave band medium level (Hz)

63 125 250 500 1k 2k 4k 8kMSL 500 1 2 6 10 19 19 15 11

MSL 600 3 5 12 22 23 23 19 15

Materjal:

L = 500; 600

Mõõt B on mürasummutava labürinB = 900; 1300; 1700; 2100; 2500;

Mõõt H on mürasummutava labürinH = 200; ...; 3000

Mõõt L on mürasummutava labürin

õhu suund

AL

H

SECTION -

B

Nois absorbing direction

MSL Sound labyrinth

MSL_supply.grf

Õhukiirus (m/s)

Rõh

ukad

u (P

a)

0,5 0,6 0,7 0,8 0,9 1 2 2,55

7

10

20

30

4050

70

100

Intake air - Pressure drop

MSL_valja.grf

Õhukiirus (m/s)

Rõh

ukad

u (P

a)

0,5 0,6 0,7 0,8 0,9 1 2 2,55

7

10

20

30

4050

70

100

Outdoor air - Pressure drop

Pre

ssur

e dr

op (P

a)

Air velocity (m/s)

Pre

ssur

e dr

op (P

a)

Air velocity (m/s)

MSL 600

MSL 500MSL 600+RV

MSL 500+RV

MSL 600+RV

MSL 500+RV


® NORDexternal | MSL

Product codes

Marking

Width x Height

Lenght

Noise absorbing direction1-noise inside2-noise outside

Example: MSL 1200x400-600-1

MSL - BxH - L - n

[email protected] www.etsnord.com

ETS NORD ASAddress: Peterburi tee 53 11415 Tallinn Estonia

Phone: +372 680 7360 [email protected] www.etsnord.ee

ETS NORD FinlandAddress: Pakkasraitti 4 04360 Tuusula Finland

Phone: +358 40 184 2842 [email protected] www.etsnord.fi

ETS NORD SwedenAddress: Järsjögatan 7 69235 Kumla Sweden

Phone: +46 707 80 50 16 [email protected] www.etsnord.se

Documents

NORDexternal External louvres - .NET Framework