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SECTION 08 90 00 - LOUVERS AND VENTS
PART 1 - 	GENERAL
1.1	SUMMARY
A.	Section Includes:
1.	Fixed, extruded-aluminum louvers.
2.	Wall vents (brick vents).
B.	See Division 8 Section "Steel Doors and Frames" for louvers in hollow-metal doors.
C.	See Division 8 Section "Flush Wood Doors" for louvers in flush wood doors.
D.	See Division 15 Sections for louvers that are a part of mechanical equipment.
1.2	PERFORMANCE REQUIREMENTS
A.	Design:  Design louvers, including comprehensive engineering analysis by a qualified engineer, using structural performance requirements and design criteria indicated.
B.	Structural Performance:  Louvers shall withstand the effects of gravity loads and the following loads and stresses within limits and under conditions indicated without permanent deformation of louver components, noise or metal fatigue caused by louver blade rattle or flutter, or permanent damage to fasteners and anchors.
1.	Wind Loads:  Determine loads based on a uniform pressure of 30 lb./sq. ft. (1435 Pa), acting inward or outward.
C.	Louver Performance Ratings:  Provide louvers complying with requirements specified, as demonstrated by testing manufacturer's stock units identical to those provided, except for length and width according to AMCA 500-L.
1.3	SUBMITTALS
A.	Product Data:  For each type of product indicated.
1.	For louvers specified to bear AMCA seal, include printed catalog pages showing specified models with appropriate AMCA Certified Ratings Seals.
B.	Shop Drawings:  For louvers and accessories.  Include plans, elevations, sections, details, and attachments to other work.  Show frame profiles and blade profiles, angles, and spacing.
C.	Samples:  For each type of metal finish required.
D.	Submittal:  For louvers indicated to comply with structural performance requirements and design criteria indicated.
E.	Product Test Reports:  Based on tests performed according to AMCA 500-L.
PART 2 - 	PRODUCTS
2.1	MATERIALS
A.	Aluminum Extrusions:  ASTM B 221M, Alloy 6063-T5.
B.	Aluminum Sheet:  ASTM B 209M, Alloy 3003 with temper as required for forming.
C.	Fasteners:  Use types and sizes to suit unit installation conditions.
1.	For fastening aluminum, use aluminum or 300 series stainless-steel fasteners.
2.2	FABRICATION, GENERAL
A.	Fabricate frames, including integral sills, to fit in openings of sizes indicated, with allowances made for fabrication and installation tolerances, adjoining material tolerances, and perimeter sealant joints.
B.	Join frame members to each other and to fixed louver blades with fillet welds concealed from view welds, threaded fasteners, or both, as standard with louver manufacturer unless otherwise indicated or size of louver assembly makes bolted connections between frame members necessary.
2.3	FIXED, EXTRUDED-ALUMINUM LOUVERS
A.	Horizontal High Performance Non-drainable Blade Louver <Insert louver type, e.g., L1>:
1.	Basis-of-Design Product:  Architectural Louvers; Model E4JP. Subject to compliance with requirements, provide the specified product or comparable product by one of the following:
a.	Manufacturers of equivalent products submitted and approved in accordance with Section 01630 - Product Substitution Procedures.
2.	Louver Depth:  4 inches (100 mm) 
3.	Blade Profile:  Plain blade without center baffle.
4.	Frame and Blade Nominal Thickness:  Not less than 0.080 inch (2.03 mm).
5.	Louver Performance Ratings:
a.	Free Area:  Not less than 9.0 sq. ft. (0.84 sq. m) for 48-inch- (1220-mm-) wide by 48-inch- (1220-mm-) high louver.
b.	Point of Beginning Water Penetration:  Not less than 950 fpm (4.8 m/s).
c.	Air Performance:  Not more than 0.10-inch wg (25-Pa) static pressure drop at 800 fpm (4.1-m/s) free-area velocity.
6.	AMCA Seal:  Mark units with AMCA Certified Ratings Seal.
2.4	LOUVER SCREENS
A.	General:  Provide screen at each exterior louver.
B.	Louver Screen Frames:  Same kind and form of metal as indicated for louver to which screens are attached.
C.	Louver Screening: Same kind of metal as indicated for louver.
1.	Insect Screening:  Aluminum, 16 x 18 square mesh, 0.011-inch wire.
2.	Bird Screening:  Flattened, expanded aluminum, 3/4 by 0.050 inch (19 by 1.27 mm) thick.
2.5	ALUMINUM FINISHES
A.	High-Performance Organic Finish: 3-coat fluoropolymer finish complying with AAMA 2605 and containing not less than 70 percent PVDF resin by weight in color coat.  Prepare, pre-treat, and apply coating to exposed metal surfaces to comply with coating and resin manufacturers' written instructions.
1.	Color and Gloss: As selected by Architect from manufacturer's full range.
PART 3 - 	EXECUTION
3.1	INSTALLATION
A.	Locate and place louvers and vents level, plumb, and at indicated alignment with adjacent work.
B.	Use concealed anchorages where possible.  Provide brass or lead washers fitted to screws where required to protect metal surfaces and to make a weather-tight connection.
C.	Provide perimeter reveals and openings of uniform width for sealants and joint fillers, as indicated.
D.	Repair damaged finishes so no evidence remains of corrective work.  Return items that cannot be refinished in the field to the factory and refinish entire unit or provide new units.
E.	Protect galvanized and nonferrous-metal surfaces that will be in contact with concrete, masonry, or dissimilar metals from corrosion and galvanic action by applying a heavy coating of bituminous paint.
END OF SECTION 08 90 00