Windows • Curtain Walls • Entrances • Storefronts Series 660 Single Hung • Series 670 Double Hung • Series 6600 Fixed 3 7⁄8" Architectural Grade Hung Thermal Window Single Hung • Double Hung • Fixed This product family of hung windows retains an AAMA Architectural Grade rating to meet the most demanding specifications and is a proven performer in projects ranging from historical replication to new construction. This hung window series is an attractive and economical product for a wide range of applications. Multiple glazing options offer flexibility to meet specific design requirements. A thermal barrier in the frame and sash improves thermal performance enhancing energy saving potential. Offered with a complete line of sub frames, mullions and architectural sills, this product family provides the complete solution for fenestration needs. Thermal barrier in vent and frame Improves U-Factor performance Enhances energy saving potential Weather-stripped sash and sill Provides superior air and water performance Continuous interlock meeting rails Improves air infiltration resistance Accommodates glazing from 1⁄8" to 1 1⁄4" depth Expands design and energy saving options Inside or outside glazed sash Flexibility in design requirements for glazing Dual glazing with optional integral blinds Improved energy savings and interior light or privacy control with low maintenance Automatic top and bottom sash locks available Increased convenience Screen frames of extruded aluminum alloy are available Stronger, more durable screens Trim-All™ panning available Allows matching of existing sight lines in restoration projects Accessory line of subframes, mullions, and architectural sills Allows custom designs with standard product Anodized or painted finishes available Multiple options to answer economic and aesthetic concerns © Copyright 2015 EFCO Corporation 05/15

Series 660 Single Hung • Series 670 Double Hung • Series 6600 Fixed 3 7⁄8" Architectural Grade Hung Thermal Window SERIES 660 Block & Tackle Block & Tackle Note: All performance value data is based on laboratory testing per AAMA 101/I.S.2/A440 for Air/Water/Structural, ASTM E90 and or E413 for Acoustical, AAMA 507 and or NFRC 100/200/500 for UFactors and AAMA 1503 for Condensation Resistance Factor (CRF). Printed values are subject to change pending the frequency of recertification testing. Field results will vary depending on size, the field test method, the addition of sub-frames, panning,...

Windows • Curtain Walls • Entrances • Storefronts Series 660 Single Hung • Series 670 Double Hung • Series 6600 Fixed 3 7⁄8" Architectural Grade Hung Thermal Window Main Frame Construction The frames have a depth of 3 7/8" and are constructed of 6063-T6 aluminum alloy. The nominal material wall thickness for the frame is .080", and the sill has a minimum wall thickness of .094". Corners are of screw spline construction and sealed. See Illustration 1. Sash Frame Construction The sash consists of aluminum members with .080" nominal material wall thickness of 6063-T6 alloy. Corners are of screw...