Aluminum Thermal Break Steel Windows

RTS430 Casement Features

• Reliant Casement PDF Word
• Reliant Door PDF Word
• Reliant Projected PDF Word

Thermal Break Hot-Rolled Steel Windows

  • ANSI/AAMA 101-93 HC40
  • 1 5/16” exterior frame depth
  • EPDM weather-stripping
  • Mitered, welded frame and sash construction
  • Uniform sight lines
  • Glazed with snap-in aluminum glazing beads
  • 3/4” to 1 3/8” glazing infill
  • One casement fastener center of sash rail up to 36”, Two casement fasteners thereafter
  • Standard Optimum Window colors (refer to OWM color chart)
  • Finish on standard colors baked polyester powder coat



  • RAL colors available as option
  • Non-metallic color matches are optional & available upon request
  • Custom hardware
  • Limited operation stops
  • Steel brake metal and trim
  • Screens


Download more detailed information on our thermal break windows.

 • In-swing Casements  PDF Word
 • Out-swing Casements  PDF Word
 • Glazing Options  PDF Word


Other thermal break windows from Optimum Window:

*Optimum Window Mfg Corp. reserves the right to change and update information as necessary.  Information on our website, as well as in marketing brochures is intended for general reference only.  For current and up to date listing details as well as general product information, please call Optimum Window Mfg. Corp directly and speak to a representative.