445A is a 4 inch deep adjustable (operable) louver with weather-stopping J blades. Sideseals on the jambs and weather-lips on each blade minimize water penetration. It is ideal for self-framing buildings or large openings requiring modulated airflow and weather protection. For shallow wall applications, see 245A - 2 inch adjustable louver. For non-modulated airflow, see 445J - 4 inch fixed-blade louver.
Dimensions and weight
- Depth:
- 3.75 inches (95 mm)
- Width:
- Maximum 48 inches (1219 mm) per panel; Larger vents made of multiple panels
- Height:
- Maximum 72 inches (1829 mm) per panel; Larger vents made of multiple panels
- Weight:
- Approximately 3.5 lbs/sqft (17.3 kg/m2)
Width and height undersized by 1/4" to fit rough openings (unless otherwise specified).
Features and options
Construction
- 0.081 inch (2.06 mm) thick aluminum extrusions
- Blades move on 7/16 inch cadmium plated steel pins in Oilite® bronze bushings
- Low Leakage (LL) nylon sideseals between jambs and blade edges
- 1/4" stainless steel linkage rod; Steel and bronze brackets
- Assembled with cadmium plated screws and rivets
Frame
- Flange frame (1" flange) for standard building installation
- Channel frame for duct installation (optional)
- Reverse flange (rear flange) frame for surface mount1 or interior installation (optional)
Screen
- 1/4" welded square mesh, 25ga galvanized steel; Fastened on front face
- 1/2" welded square mesh, 21ga galvanized steel (optional)
- 1/8" woven square mesh, 27ga galvanized steel (optional)
- 1/16" nylon insect screen (optional)
Adjustment & locking device
- Manual adjustment with wingnut lock
- Spring and chain for inaccessible installation (optional)
- Motorized operation via long pin or linkage actuator kit (optional)
Linkage and control
- Back-face linkage and control for standard building installation
- Front-face linkage and control for exterior operation (optional)
- Back-face linkage with front-face control for exterior operation (optional)
- Multiple linkages for high velocity applications (optional)