PublicationStandardWeather

LOUVRES SEPT 2005

Section 1

J C V E N T S

Standard Weather Louvreshigh performance

Series OJ and OL standard louvres have been designed to provide weather protection to ventilation openings in buildings. In addition to the modular sizes shown it is possible to specify OJ and OL louvres for cladding, louvre screens, access doors and other architectural features.

Louvres are conventionally specified in terms of the building aperture size, and suitable tolerances are built in before manufacture. Size should be given in terms of Width ‘W’x Height’H’

Standard finish stove silver Special finishes are available to suit most architectural requirements and include:

Natural satin anodised (AA25 micron) Colour Anodised Polyester powder coat Stoved epoxy Stoved acrylic Syntha Pulvin PVF2 Primed Mill

OJ nd OL louvres are composed of frame and blade assemblies manufactured to suit the building aperture size. Different formats are available to suit aesthetic requirements: OJ with 75mm pitch and OL with 38mm pitch blades.

Frame options include flanged and recessed types. An adjustable louvre option is available for applications requiring automatic or manual closure/opening of the louvre.

OJ and OL louvres are manufactured from extruded aluminium sections which conform to BS1474 using material specification HE9. Frames and blades are screwed, riveted or cleated to form a robust structure.

2

Std Weather Louvres

introduction

description

size convention

manufacture

finishes

accessories

applications The most common application of OJ and OL louvres is to protect the supply and exhaust duct openings through the building fabric from the ingress of water. Louvres may also be used for transfer applications where free flow ventilation of rooms is required to meet building regulations.

Bird or vermin guard (BS) galvanised mesh fixed to the rear of the louvre section.Insect screen (IS) in stainless steel fixed to the rear of the louvre. Rain lip (RL) in the form of an extended bottom blade.

OJ - 75mm PitchFIXED BLADE LOUVRES

OJ / ADJ - 75mm PitchADJUSTABLE BLADE LOUVRES

OL - 38mm PitchFIXED BLADE LOUVRES

Page 4 - 5 Page 6 - 7 Page 8 - 9

Close

MOTORISED UNIT

Page 10Sitework

TransportHandling

Installation andMaintenance

Page 11Performance data

Back pageOther JC Vents

literature

3

OJ and OL Range overviewcontents

J C V E N T S

Large format, fixed blade, weather louvres with a choice of flanged or recessed frame systems. Blades are pitched at 75mm and the lower blade can be extended to form a rain lip to carry surface water away from the wall. OJ louvres are suitable for most weathering applications.

O/A

Nom

inal

+ 5

7mm

5mm

Bird

Wire

Mes

h fit

ted

to re

ar

Duc

t or O

pen

ing

Hei

ght

Nom

inal

Lou

vre

Hei

ght

O/A Frame

64mm

75m

m

Nom

inal

Op

enin

g -

19m

m38

mm

O/A

Nom

inal

- 3m

m

Bird

Wire

Mes

h fit

ted

to re

ar

Duc

t or O

pen

ing

Hei

ght

Nom

inal

Lou

vre

Hei

ght

O/A Frame

64mm

75m

m12

.5m

m

4

OJ / F flanged frame

OJ / Rrecessed frame

OJ Louvre

FO = Stove Si lverF1 = Anodised NaturalF2 = Anodised ColourF3 = Powder Coat ColourF4 = Stoved Epoxy ColourF5 = Stoved Acryl ic ColourF6 = Syntha Pulv inF7 = Pr imed CoatF8 = Mi l l F in ish

Width x Height (mm) (Nominal opening).

BS = Bird ScreenIS = Insect ScreenEB = Extended Blade

OJ louvres are manufactured to suit the building aperture sizes on a contract basis. For individual modular louvres the following ordering designation should be applied.

BS = Bird ScreenIS = Insect ScreenEB = Extended bottom blade

Larger sizes are available in sections.

F = FlangedR = Recessed

Louvre free areas, pressure loss and general selection data are shown on page 11.

ordering

legendframe

accessories

size

finish

Maximum size3000 X 2000

sizes

Minimum size300 X 300

type finishsizeaccessoriesframe

OJ / * / ** / *** / *** X *** / F *

Extended bottom Blade

options

performance

SS = Screw through StackSF = Screw through FlangeRL = Rear LugMT = Masonary Tie

fixing

fixing

5

OJ Louvre

J C V E N T S

O/A

Nom

inal

+ 5

7mm

5mm

Bird Wire Mesh fitted to rear

O/A Frame

64mm

75m

m

Nom

inal

Op

enin

g -

19m

m38

mm

O/A

Nom

inal

- 3m

m

Bird Wire Mesh fitted to rear

O/A Frame

64mm

75m

m12

.5m

m

Large format, adjustable blade, weather louvres. The blades are individually pivotted on stainless steel/nylon bearings and ganged to a rear operator. A side seal is provided at the blade ends to prevent water ingress.

Opening or closing via a manual, electrical or pneumatic actuator which is positioned to the rear of the louvre.

Adjustable louvres may be used for a variety of purposes including automatic temperature control, ventilation or smoke release.

MOTORISED UNIT

MOTORISED UNIT

6

OJ / F / ADJ flanged frame

OJ / R / ADJrecessed frame

OJ / ADJ Louvres

Modules can be joined on site if required to operate with a single actuator.

ordering

legend

Maximum size1000 X 2000

sizes

Minimum size300 X 300

FO = Stove Si lverF1 = Anodised NaturalF2 = Anodised ColourF3 = Powder Coat ColourF4 = Stoved Epoxy ColourF5 = Stoved Acryl ic ColourF6 = Syntha Pulv inF7 = Pr imed CoatF8 = Mi l l F in ish

Width x Height (mm) (Nominal opening).

BS = Bird ScreenIS = Insect ScreenEB = Extended Blade

OJ/ADJ louvres are manufactured to suit the building aperture sizes on a contract basis. For individual modular louvres the following ordering designation should be applied.

LO = Lever Operated (STD)MLQ = Manual Locking QuadrntMotor = Motor ActuatedPNU = Pnematic ActuatedFL = Fusible LinkCH = ChainTF = Tele Flex

F = FlangedR = Recessed

Louvre free areas, pressure loss and general selection data are shown on page 11.

frame

accessories

size

finish

type finishsizeaccessoriesframe

OJ/AJD / * / ** / *** / *** X *** / F *

options

performance

SS = Screw through StackSF = Screw through FlangeRL = Rear LugMT = Masonary Tie

fixing

fixing

MANUAL LOCKING QUADRANT

MOTORISED

FUSIBLE LINK CHAIN OPERATED

7

OJ / ADJ Louvres

J C V E N T S

O/A

Nom

inal

+ 4

5mm

Bird

Wire

Mes

h fit

ted

to re

ar

Duc

t or O

pen

ing

Hei

ght

Nom

inal

Lou

vre

Hei

ght

O/A Frame

32mm

38m

m

Nom

inal

Op

enin

g -

19m

m32

mm

O/A

Nom

inal

- 3m

m

Bird

Wire

Mes

h fit

ted

to re

ar

Duc

t or O

pen

ing

Hei

ght

Nom

inal

Lou

vre

Hei

ght

O/A Frame

32mm

38m

m12

.5m

m

Small format, fixed blade, louvres available with a choice of flanged or recessed frames. Blades are pitched at 38mm and the bottom blade can be extended to form a rain lip. OL louvres are suitable for most light weathering applications requiring small louvres or a fine line asthetic appearance.

8

OL / F flanged frame

OL / Rrecessed frame

OL Louvre

Larger sizes are available in sections.

ordering

legend

Maximum size1500 X 2400

sizes

Minimum size300 X 300

FO = Stove Si lverF1 = Anodised NaturalF2 = Anodised ColourF3 = Powder Coat ColourF4 = Stoved Epoxy ColourF5 = Stoved Acryl ic ColourF6 = Syntha Pulv inF7 = Pr imed CoatF8 = Mi l l F in ish

Width x Height (mm) (Nominal opening).

BS = Bird ScreenIS = Insect ScreenEB = Extended Blade

OL louvres are manufactured to suit the building aperture sizes on a contract basis. For individual modular louvres the following ordering designation should be applied.

BS = Bird ScreenIS = Insect ScreenEB = Extended bottom blade

F = FlangedR = Recessed

Louvre free areas, pressure loss and general selection data are shown on page 11.

frame

accessories

size

finish

type finishsizeaccessoriesframe

OL / * / ** / *** / *** X *** / F *

Extended bottom Blade

options

performance

SS = Screw through StackSF = Screw through FlangeRL = Rear LugMT = Masonary Tie

fixing

fixing

9

OL Louvre

J C V E N T S

OJ and OL louvres are robustly constructed but reasonable care should be taken during handling to ensure that the surface finish is not damaged.

If fitted with any form of actuator the OJ/ADJ louvre should not be subjected to continuous wetting.

Building apertures should be clean and square with a general tolerance of 3mm.

Lifting and placement is usually a two man operation and if lifting gear is used, no undue stress should be placed on individual louvre blades or frames.

Fixed and adjustable louvres have been designed to be maintenance free when applied within our recommended guidelines. Louvre surfaces can be cleaned by wiping with water and a mild detergent.

Alternative fixings including rear lugs, screw through flange, etc., which can be supplied optionally.

Standard fixing is by screw through the stack; holes drilled on site where convenient.

fixing

transport and storage

installation

operation and maintenance

SS - SCREW THROUGH STACK

MT - MASONARY TIE

SF - SCREW THROUGH FLANGE

RL - REAR LUG

10

Sitework

VOLUME

20000

M3/SECPER M

M3/HRPER M

9000

8000

5000

6000

7000

15000

10000

500

600

700

800

900

1000

1500

2000

3000

4000

250

300

400

6

.07

.08

.09

.1

.15

.3

.4

.5

.6

.7

.8

.9

1

2

3

4

5

.2

PRESSURE DROP N/M2

78

60

19

31

45

122

7.7

11

VELOCITYM3/SEC

2.5

3

4

5

6

7

8

9

10

98

1.8

1.4

1.2

1.0

0.8

0.7

0.45

0.4

0.35

0.3

0.9

1.6

HEIGHTM

NOTE: Air volume is per metre of louvre width.

4.7

2.7

2

1.5

0.9

1.1

0.9

1

0.8

0.6

0.8

0.7

0.50.6

0.30.5

0.5

0.55

0.6

2.0

NOISE LEVELLW NR

OLOJ

60

45

50

55

40

30

35

60

45

50

55

40

30

35

25

Example: 4m wide x 0.9m high OJ/F Air volume 8m3/sec Select at 2m3/sec/metre Velocity 4.8m/sec Total pressure 28n/m2

Noise level 56NR

nomogram

Sta

ndar

d L

ouvr

e H

eig

ht D

imen

sion

s

11

Louvre selection

J C V E N T S

Tel: 01268 561122Fax: 01268 560606

email: info@jcvents.co.ukweb: www.jcvents.co.uk

J C V E N T SJC House,Hurricane Way,Wickford Business Park,Wickford,Essex SS11 8YB,UK.

section 1 Standard Weather Louvres

section 2 Self Drain Louvres High Performance

section 3 Penthouse / Turret Louvres

Louvre programme literature