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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: [email protected]: 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