Specifications - City of Montpelier, Vermont

Title:Montpelier District HeatingCity of Montpelier, VT15891 – Metal Ductwork & AccessoriesIssue Date:September 28, 2012Page #:9 of 19E. Manufacturers: Subject to compliance with requirements, provide dampers of oneof the following:1. Air Balance, Inc.2. American Warming & Ventilating, Inc.3. Arrow Louver and Damper; Div. of Arrow United Industries, Inc.4. Greenheck Fan Corp.5. Louvers & Dampers, Inc.6. Ruskin Mfg. Co.F. Counterbalanced Relief Dampers: Provide dampers with parallel blades,counterbalanced and factory set to relieve at indicated static pressure. Constructblades of 16 gauge aluminum, provide 1/2" diameter ball bearings, 1/2" diametersteel axles spaced on 9" centers. Construct frame of 2" x 1/2" x 1/8" steel channelfor face areas 25 sq. ft. and under; 4" x 1¼" x 16 gauge channel for face areasover 25 sq. ft. Provide galvanized steel finish on frame.1. Air Balance, Inc.2. American Warming & Ventilating, Inc.3. Arrow Louver and Damper; Div. of Arrow United Industries, Inc.4. Greenheck Fan Corp.5. Louvers & Dampers, Inc.6. Ruskin Mfg. Co.2.6 DUCT HARDWAREA. General: Provide duct hardware, manufactured by one manufacturer for all itemson project, for the following:B. Quadrant Locks: Provide for each manually controlled damper, quadrant lockdevice on one end of shaft; and end bearing plate on other end. Provide extendedquadrant locks and extended end bearing plates for externally insulated ductwork.C. Manufacturers: Subject to compliance with requirements, provide duct hardwareof one of the following:1. Duro Dyne National Corp.2. Ventfabrics, Inc.3. Young Regulator Co.METAL DUCTWORK AND ACCESSORIES 15891 9