icon-address.png1276 W. Main St.  Bellevue, OH  44811

325 Energy Sentry® Architectural
Aluminum Window Systems

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With maintenance-free framework and reliable hardware, our Capitol 325 Energy Sentry® window systems will meet or exceed your durability performance expectations at an economic price. Capitol window systems minimize air infiltration, limit temperature changes, and offer aesthetic enhancement to any project. Our thermally broken and quality constructed windows also limit distractions due to exterior noise.


  • Custom sizes to fit almost any application
  • Fixed, project-in, project-out, casement
  • Designed for schools, institutions, architectural, and commercial buildings
  • Vent = .125” wall thickness / Frame = .080”
  • Available in a variety of anodized or painted finishes
  • 3-1/4” AW performance rated window
  • Glazing: 1/4”, dual-glazed, 1” insulated glass, and 1”, 2”, 2-1/2” insulated panels available
  • Internal or surface applied muntins available
  • Multiple trim systems include subframe, mullion, panning, and sills
  • Hinged blind sash with 5/8” integral blind (Screw applied blind sash available)
  • Insulation U-Value range of .28 - .44 (Varies depending on glass type)
  • Tubular sliding wicket screen available



Series Frame Depth Typical Wall Thickness Rating Blind Access Panels Muntins Water Resistance U-Value STC
325 ES 3-1/4" Vent = 0.125"
Frame = 0.080"
YES YES 15 psf NFRC 102-2004
V/F = .45*

*Varies upon glass make-up or infill type

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