
USS - External louvre

Steel external louvre for air intake and exhaust
Solid louvre that is easy to install.
- External louvre for air intake and exhaust to prevent rainwater, snow, leaf and animal ingress
- Rainwater ingress penetration efficiency of approx. 95%
- Excellent operation based on special front edge blade profile and side grooves
- Grille and steel mesh section detachable from outside
- Polyester-painted galvanised steel as standard finish
Product models and accessories
- Modular construction available for large sizes
- Models available made of painted, unfinished or anodised aluminum, stainless steel (AISI 316) and copper
- Model with circular duct connection also available (USD)
The outdoor louvre is manufactured from galvanised steel with an painted finish.
The louvre includes mesh fitted behind the grille.
The outdoor louvre is effective in preventing rainwater, snow, leaves, and animals and other objects entering the ductwork.
The louvre has a rainwater prevention capacity of at least 90% (EUROVENT 2/5).
The louvre is suitable for medium and high airflow rates.
Halton USS
Steel external louvre for air intake and exhaust
- External louvre for air intake and exhaust to prevent rainwater, snow, leaf and animal ingress
- Rainwater ingress penetration efficiency of approx. 95%
- Excellent operation based on special front edge blade profile and side grooves
- Grille and steel mesh section detachable from outside
- Polyester-painted galvanised steel as standard finish
Product models and accessories
- Modular construction available for large sizes
- Models available made of painted, unfinished or anodised aluminum, stainless steel (AISI 316) and copper
- Model with circular duct connection also available (USD)
Dimensions ▲
W | H |
150, +50, ..., 1200 | 150, +50, ..., 1000 |
At the joint between modules, the dimension is 105 mm.
In addition to standard sizes, other sizes can be specially ordered. The maximum nominal size is 1200x1000 mm.
It is possible to have a continuous grille of modular design when the installation length is greater than 1200 mm. The maximum total length is 20 m.
Halton USD
NS | øD | W1 | W2 | H1 | H2 | Weight (kg) |
125 | 124 | 273 | 195 | 273 | 195 | 2,15 |
160 | 159 | 273 | 195 | 273 | 195 | 2,15 |
200 | 199 | 323 | 245 | 323 | 245 | 2,80 |
250 | 249 | 373 | 295 | 373 | 295 | 3,55 |
315 | 314 | 423 | 345 | 423 | 345 | 4,30 |
400 | 399 | 523 | 445 | 523 | 445 | 6,70 |
500 | 499 | 623 | 545 | 623 | 545 | 9,50 |
Material ▲
Part | Material | Finishing | Note |
Fixed blades | Galvanised steel | The standard material is painted galvanised steel. Special colours and anodising of aluminium are available on request. | Optionally aluminium, copper or stainless steel (AISI 316) |
Frame | Galvanised steel | The standard material is painted galvanised steel. Special colours and anodising of aluminium are available on request. | Optionally aluminium, copper or stainless steel (AISI 316) |
Mesh (10 x 10 mm) | Galvanised steel | Stainless steel (AISI 316) |
Function ▲
Air is supplied or extracted through the horisontal blades. The design of the grille prevents rainwater from reaching the ductwork. The slot between the frame and the top blade is sealed, thus preventing rainwater from entering the ductwork from above. Drops of water are collected in the grooves at the front edge of the blades. Water flows to the side grooves, where it drops down.
Blade construction
Depth of blade 65 mm, distance between blades 50 mm, free area 50%
Water penetration prevention (USS/I)
Water penetration rating per square meter of louvre tested according
standard EN 13030:2001. Core velocity at free duct area of louvre size.
Snow penetration prevention (USS/I)
v0 Velocity at free duct area of louvre size.
Installation ▲
Code description
1. Frame
2. Blades
3. Steel mesh
The grille is suitable to be screw-fixed into a prepared masonry wall opening.
Drill holes in the flanges of the frame on the site.
The dimensions of the grille are given as the nominal dimensions of the opening.
Installation of modules
Code description
1. Horisontal support
2. Vertical support
3. Steel mesh
4. Bolt and nut (M8 x 10)
In a modular installation, the frames of adjacent modules are bolted together before installation of the louvre sections.
In large modular installation (heigth > 2000 mm) the louvres shall be installed with a support structure (not included in delivery).
Servicing ▲
If required, the grille is cleaned with a soft brush.
Specification ▲
The outdoor louvre is manufactured from galvanised steel with an painted finish.
The louvre includes mesh fitted behind the grille.
The outdoor louvre is effective in preventing rainwater, snow, leaves, and animals and other objects entering the ductwork.
The louvre has a rainwater prevention capacity of at least 90% (EUROVENT 2/5).
The louvre is suitable for medium and high airflow rates.
Order Code ▲
USS/S-W-H
S = Model
I Intake
W = Width
150, +50, .., 12000
H = Height
150, +50, .., 10000
Arranged with circular duct connection
Halton USD-S
S Duct diameter (125, 160, 200, 250, 315, 400, 500)
Other options and accessories
MA = Material (option only for USS)
CS Steel
AS Stainless steel (AISI 316)
AL Aluminium
CU Copper
FI = Finishing (option only for USS)
PN Painted
NA No finishing
AN Anodised
AM Anodised aluminium (spec.color)
CO = Colour
G Grey
X Special colour
N No painting
ZT = Tailored product
N No
Y Yes
Code example
USS/I-150-150, MA=CS, FI=PN, CO=G; ZT=N
USD-200, CO=G, ZT=N
Downloads & Media
Halton USS - fr | Type Datasheet | Language French (France) | Size 479.5 kB |