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400 500 balance hung

Operable sash move smoothly with a constant force coil spring balance system that never needs adjustment.

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On Double Hung windows, sash slide easily up or down due to a constant force coil spring balance system.

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Interlocking design of the meeting rail on Double Hung windows securely fastens sash together.

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To assist with quick
installation, Series 400
windows are available
with wood or Quick
Trim™ cellular pvc jamb
extensions. Choose either 4-9/16″ or 6-9/16″
construction.

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The U-channel spacer system, more efficient than conventional spacers, moderates outside air before it hits the inside sash.