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2500 Series Double Hung

Hung Window

Frame Depth (inches) 4.5


Description Architectural grade Double hung window with side-load sash that mulls to 4-1/2" fixed and operable products.


  • Applications
  • Commercial
  • Education
  • Historic Replication

AAMA Rating


Test Size (inches)

60 x 99

Air Infiltration (cfm/ft2)


Water Resistance (psf)


Design Pressure Positive (psf)


Uniform Load Structural (psf)



0.49 - 0.60





Standard Features

  • Block & tackle balances for superior operation
  • Mulls to 4 1/2" frame fixed and operable products
  • Sash easily removes from frame for maintenance & cleaning
  • Sash bypass one another for ease of cleaning (using sweep-lock option)
  • Removable take-out clips to prevent unauthorized sash removal
  • Full-length extruded lift handles
  • Exterior-beveled (putty) glazing leg on historic models

Optional Features

  • Applied-profile muntin grids
  • Dual-glazed split sash to permit high-performance glazing combinations
  • Dual window available in some configurations
  • Extruded automatic sill latches
  • High-performance balances up to 120 lbs. per sash (larger sightlines at jambs)
  • True colonial muntins
  • White bronze hardware
  • Simulated (fixed) double hung for historic applications
  • Thermal Strut (S2500) version available

Related Products

1500 Series Fixed

Fixed Window
Frame Depth (inches) 4.5
Description Architectural grade fixed window system mulls to 4-1/2" fixed and operable products.
U-Value0.34 - 0.55
AAMA RatingAW-PG120 / FW-HC100
Test Size (inches)60 x 99
Air Infiltration (cfm/ft2)0.01
Water Resistance (psf)12.11
Design Pressure Positive (psf)120.30
Frame Depth (inches) 4.5
Description Architectural grade thermal strutted double hung with side-load sash commercial window for monumental sizes that mulls to 4-1/2" products.
U-Value0.49 - 0.63
AAMA RatingAW-PG80
Test Size (inches)60 x 99
Air Infiltration (cfm/ft2)0.26
Water Resistance (psf)12.11
Design Pressure Positive (psf)80.20

Technical Data

Installation Accessories

4½" Unitized Frame Accessories
View Accessories >
4½” Frame Accessories
View Accessories >

CAD Files




Insulating Glass; Historic
Insulating Glass; Historic; True Colonial Muntins
Insulating Glass; Historic; With Astragal
Insulating Glass; Flat Frame
Lock Options
Guardian Sash Blind Options
Frame Options
Frame Options; Jambs - 1
Frame Options; Jambs - 2
Frame Options; Head & Sill
Options; True Muntin Glazing
TESTING: Our products are tested to the standards of and certified by the American Architectural Manufacturer's Association and the National Fenestration Rating Council.