Energy-Efficient Vinyl Windows


Save up to $600 with a PSO Instant Rebate!


If you are an AEP/PSO Customer, you can qualify for an instant rebate of $30 per window, up to a maximum of $600 when you purchase our vinyl windows with Triple Silver Low-E Glass and Argon!


Call (918) 663-7580 and talk to a Thermal Windows salesperson for details.

House with vinyl windows
New Thermal Windows will improve the appearance of your home.

Single Hung and Double Hung windows tilt in for easy cleaning.
Available in Bright White or Almond.
Cutaway view of vinyl windows
High-performance SuperSpacer® enhances energy efficiency.

Series 6625 Horizontal sliders offer a great view with ventilation.

Standard Features

  • Fully welded sash
  • Sloped sill for improved drainage
  • Bright White or Classic Almond colors
  • Custom manufactured for an exact fit
  • Single Hung & Double Hung tilt in
    for cleaning
  • Reinforced interlocking meeting rails
  • 7/8" insulated glass
  • Carbon steel spiral sash balances
  • Sturdy aluminum-framed screen
  • Dense pile weatherstripping seals out
    wind & water

Available Options

  • Divided lites (flat or contoured)
  • Safety "Night Latches" for ventilation
  • "Obscure" glass for privacy
  • Sound-reduction "STC" glass
  • ThermalSafe laminated safety glass
  • Tinted glass
  • Low-E glass
  • Argon gas fill


NFRC Product Information


Use the links below to see NFRC Certified performance information.


6600 Vinyl Single Hung
6625 Vinyl Single Slider
6800 Vinyl Double Hung
6825 Vinyl Double Slider
6850 Vinyl Picture Window


Bay window (2 Double Hungs flanking a Picture Window)
Circletops over twin Picture Windows
Picture Windows in Twin and Triple configurations
Series 6800 Double Hung
Series 6600 Single Hung
Series 6850 Picture Window
Series 6825 Double Horizontal Slider
Series 6853 Archtop Windows over Series 6825 Double Horizontal Sliders