printPrint this page

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






The air infiltration and water resistance performance values provided above were achieved in a controlled lab environment. Performance of our products in the field will vary depending on product configurations, installation methods, and ambient conditions. AAMA 502 “Voluntary Specification for Field Testing of Newly Installed Fenestration Products” should be adhered to for testing installed products.

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
  • 3" Extruded Auto Lock or Full Length Extruded Auto Lock (specify)
  • 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

Product Literature

Additional Resources

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.