Horizontal Sliding Windows

White
sandstone
almond
bronze
black
dark gray
creme
dauphin gray
brick red
bone white
medium bronze
clear anodized
dark green

Series 525 and 725

Horizontal Sliding Windows

Ventilation at your fingertips.

These incredibly versatile windows can be configured using single or double sash in two or three sections with operating vents placed where you need them.


We custom manufacture them in sizes ranging from small bathroom windows to full patio enclosures.

Standard Features

  • Sealed 7/8in. insulated glass for optimum thermal efficiency
  • Center cam lock plus a hidden metal security lock on each operating sash
  • Each operating sash easily and conveniently lifts out for cleaning
  • Removable insect screens with your choice of wire or fiberglass mesh
  • Rollers are durable, corrosion-resistant metal for easy operation
  • High-density pile weatherstripping with mylar fins to seal out wind and water
  • Lifetime Limited Warranty when we install in your primary residence

Color Options

To match your home’s individuality, we offer a wide palette of powder coating and anodized finishes.
(Hover/Tap to see color names.)

Standard Colors

White
Sandstone
Almond
Bronze

Designer Colors

Black
Dark Gray
Creme
Dauphin Gray
Brick Red
Bone White
Medium Bronze
Clear Anodized
Dark Green

Reasons to Choose Thermal Windows

Oklahoma Owned and Operated
Founded by Bob G. Pool in 1979, Thermal Windows has been custom manufacturing energy efficient windows and sliding glass doors in Tulsa, Oklahoma for over 40 years.

Custom Manufactured for You
None of our windows are mass-produced. We manufacture them in our Tulsa, Oklahoma production facility to your exact specifications. Custom shapes, sizes and colors such as bronze and black are our specialty.

Convenience

Thermal windows are maintenance-free, made from strong, precision-engineered aluminum, with a durable powder coat finish that never needs painting. The tilt-in sash makes cleaning from inside your home quick and easy.

Security
Strong cam locks and hidden locks provide exceptional security. Additional security is available with optional ThermalSafe glass.

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Exceptional Warranty

At Thermal Windows, we're proud of the quality of our products, installation and service. If a problem occurs that is covered by our warranty, you have the comfort of knowing that you will be dealing directly with us, the manufacturer who is familiar with you and your order, not a factory in a distant state. Since proper installation is a crucial part of window and door performance, our Lifetime Warranty only applies to products installed by Thermal Windows.

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This Product In Use

Take a look at some of the recent images of our Horizontal Sliding Windows in use.