substitution request - Alliance Construction Solutions

E. Dampers: Opposed blade volume dampers shall be provided for all sidewall-type supply
air registers, sidewall-type exhaust air registers (installed on wall or in ceiling), and floor
supply air registers, except as otherwise indicated or scheduled.
2.04 LOUVERS:
A. General: Except as otherwise indicated, provide manufacturer's standard 6” deep,
stationary, drainable blade-type louvers with hidden vertical mullions, frame with integral
caulking slots and sill extension, and aluminum bird screen, where shown; of sizes
indicated; constructed of extruded aluminum; with components as indicated; and as
required for complete installation. Louvers shall be Ruskin model ELF6375DX (extruded
aluminum, 6” deep, 37½° fixed blades) or approved equivalent.
B. Performance: Provide louvers that have a minimum of 50% free area (applicable to 48” x
48” size) and a maximum pressure drop through the free area not exceeding that of those
specified on drawings and schedules for each type as listed in manufacturer's current data.
C. Substrate Compatibility: Provide louvers with frame and sill styles that are compatible with
adjacent substrate, and that are specifically manufactured to fit into construction openings
with accurate fit and adequate support, for weatherproof installation. Refer to general
construction drawings and specifications for types of substrate which will contain each type
of louver.
D. Materials: Louver frames and blades shall be constructed of 0.080” thick aluminum
extrusions, ASTM B-221, Alloy 6063-T5. Units shall be welded or assembled with stainless
steel fasteners.
E. Louver Screens: 3/4” square mesh anodized aluminum wire bird screen, mounted in
removable extruded aluminum frame, shall be provided on inside face of exhaust air outlet
louvers and outside face of outside air intake louvers.
F. Finish: Color and finish type shall be as specified by Architect.
PART 3 – EXECUTION
3.01 INSPECTION:
A. Examine areas and conditions under which air outlets and inlets are to be installed. Do not
proceed with work until unsatisfactory conditions have been corrected.
3.02 INSTALLATION:
A. General: Install air outlets and inlets in accordance with manufacturer's written instructions
and in accordance with recognized industry practices, to ensure that products serve intended
functions.
B. Coordinate with other work, including ductwork and duct accessories, as necessary to
interface installation of air outlets and inlets with other work.
Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
23 3713 - 4 DIFFUSERS, REGISTERS, AND
GRILLES