Windows • Curtain Walls • Entrances • Storefronts Series 3903 Thermal 3 1⁄4" Heavy Commercial Projected Window Project-In • Project-Out • Casement In • Casement Out • Fixed Series 3903 retains an AAMA Architectural Grade rating to meet the most demanding specifications. Designed for educational, institutional and high-rise residential, the 3903 window system is an attractive product for a wide range of applications. Multiple glazing options provide flexibility to meet specific design requirements. E-Strut™ thermal isolators provide outstanding thermal performance and dual finish capability. Offered with a complete line of sub frames, mullions and architectural sills, the 3903 window provides the complete solution for your fenestration needs. E-StrutTM thermal isolator Allows dual finish capability Improved thermal performance Completely eliminates dry shrinkage Accommodates glazing units from 3⁄16" to 2" depth Expands design and energy savings options Dual glazing with optional integral blinds Improved energy savings and interior light or privacy control with low maintenance Wide variety of locking and operating hardware available Permits hardware options to address specific requirements Angle reinforced vent corners Improves sash/vent rigidity Accessory line of subframes, mullions, and architectural sills Allows custom designs with standard product Anodized and painted finishes available Multiple options to answer economic and aesthetic concerns Screen frames of extruded aluminum alloy are available Stronger, more durable screens © Copyright 2012 EFCO Corporation 11/12 1000 COUNTY RD • MONETT, MO 65708 • 800.221.4169 • efcocorp.com

Series 3903 Thermal 3 1⁄4" Heavy Commercial Projected Window Vent Frame Construction Main Frame Construction * Based on NFRC 100 **NFRC Gateway size Note: All performance data is subject to change based on testing recertification and/or revised AAMA testing protocol. Please contact EFCO for latest performance values. Monolithic & Insulated Glass Exterior Lite Dual Glazing Interior Lite Friction Adjuster Rotor Operator* Access Controlled Lock O O Pole Ring Cam Handle O O Project-In Project-Out Casement Inswing With 4-Bar Arms Casement Outswing With 4-Bar Arms Casement Inswing With Butt Hinges...

Windows • Curtain Walls • Entrances • Storefronts Series 3903 Thermal 3 1⁄4" Heavy Commercial Projected Window Main Frame Construction The frame is constructed from .125" nominal material wall thickness aluminum of 6063-T6 alloy with a depth of 3 1/4". An equal leg frame is standard. Corners are of screw spline construction and back sealed with a small-joint seam sealer. See Illustration 1. Vent Frame Construction The 2 7/16" deep vent consists of tubular aluminum members with .125" nominal material wall thickness of 6063-T6 alloy. Vent corners are mitered, angle reinforced, crimped, cold epoxy...