
Fixed Casement & Direct-Set Windows
Thermo-Tech Fixed Casement and Direct-Set window systems invite creative applications for new construction or renovation projects. Use Fixed Casements for simple picture windows or in multiple Casement window units. Mulling them together creates a variety of combinations. Direct-Set picture windows, our most versatile stationary option, can stand-alone or adjoin Double-Hung, Single-Hung or Slider windows in impressive multiple-wide units. Transoms above them add an elegant touch. Direct-Set windows follow the same standard sizes as Fixed Casements.
Available as a Energy Guard Super High-Performance R5-Plus Window. Learn more.
Color Options
Exterior Frame Colors
In addition to standard white vinyl, frames are available in two other exterior colors to match virtually any home style or color.
White
Tan
Sandlewood
Interior Wood Laminate Colors
Not available on Single-Hung windows.
Get the warmth and classic beauty of wood with the comfort and ease-of-maintenance of vinyl. At Thermo-Tech, we never stop improving our vinyl windows and doors. We always start with expert design, durable construction and maintenance-free 100% virgin vinyl. But it’s the finishing touches that are turning heads – like our wood laminates featuring the warmth of wood and the maintenance-free insulating power of vinyl.
Light Oak
Dark Oak
Wood laminates available with White or Sandlewood exteriors only.
Glass Options
High Performance LoDz 272/Argon
Double insulated glass with LoDz 272/Argon on one glass surface
Thermo-Tech windows come standard with double-pane insulated LoDz 272 glass featuring two panes of double-strength glass with an argon gas filled airspace for superior insulation. This option improves heating efficiency by nearly doubling the insulating power over ordinary clear glass, and blocks enough solar heat that cooling loads can be cut by 25% or more. Fading of furniture, floors, and drapes is reduced by filtering out 84% of the Sun’s harmful ultraviolet rays. Thermo-Tech products utilizing this High Performance Glass meet Energy Star guidelines in casements, fixed casements, direct sets, and awnings.
Premium High Performance Lodz 366/Argon
Double insulated glass with Lodz 366/Argon on one glass surface
Our double-pane insulated Lodz 366 heat-reflecting glass adds even more insulating power for premium thermal performance. Double-strength heat-reflecting glass with an Argon filled airspace delivers a balance of solar control, thermal performance, and high visibility to optimize home energy savings and comfort. Plus, this option provides additional fade protection by blocking 95% of the Sun’s harmful ultraviolet rays. Thermo-Tech products utilizing this Premium High Performance Glass meet Energy Star guidelines in casements, fixed casements, direct sets, and awnings.
Ultimate High Performance Lodz 366/Argon/i89
Double insulated glass with Lodz 366/Argon on one glass surface and i89 on interior surface
Thermo-Tech’s Ultimate High Performance glass delivers a “twin punch”. It offers all the benefits of our Premium High-Performance glass while maximizing thermal and visibility benefits, compared to other double-pane options, by adding a LoĒ i89 coating on the interior glass surface. Together this combination ensures the greatest thermal performance in all dual-pane applications. Thermo-Tech products utilizing this Ultimate High Performance Glass meet Energy Star guidelines in single hungs, double hungs, casements, fixed casements, direct sets, sliding windows, awnings, and patio doors.
Energy Guard Triple Insulated Glass Energy Star Most Efficient
Triple insulated glass with high performance Lodz 366/Argon on two glass surfaces
Get the maximum energy savings, comfort, ultraviolet protection, and the superior sound proofing of Thermo-Tech’s Energy Guard glass. Energy Guard windows incorporate three layers of double-strength glass with Lodz 366 on two glass surfaces, and two half-inch argon gas filled insulated air spaces. This option meets Energy Star’s Most Efficient criteria in the North/Central, South/Central, and Southern Zones, and is available in casements, fixed casements, direct sets, and awnings.
Energy Guard PLUS Triple Insulated Glass Energy Star Most Efficient
Triple insulated glass with high performance LoDz 272/Argon on two glass surfaces
Energy Guard PLUS triple-pane glass meets Energy Star Most Efficient standards for many tough climates including the Northern zone. Get maximum energy savings, comfort, ultraviolet protection, and sound proofing PLUS the added solar heat-gain necessary to optimize home heating during frigid Northern winter months. Energy Guard PLUS utilizes three layers of double-strength glass with LoDz 272 on two glass surfaces, and two half-inch argon gas filled insulated air spaces. Energy Guard PLUS is available in casements, fixed casements, direct sets, and awnings.
Other Glass Options
Obscure
Obscure glass protects your privacy while allowing abundant light to enter the room. Choose from a variety of colors and texture patterns for a translucent to semi-opaque effect.
Grey or Bronze Tinted
Tinted glass provides additional shading from direct sunlight and warm conditions. A variety of tones and thicknesses are available.
Tempered Safety Glass
Tempered safety glass is extremely strong and often used for its safety characteristics. If tempered safety glass does break, it breaks into small pieces without sharp edges. Standard for patio door, side lights and even bathroom shower and tub enclosures, tempered safety glass is ideal for reducing the likelihood of injury in the event of breakage.
Replacement Window Options
Custom-sized replacement frame system. More options for a truly custom fit!
Thermo-Fit custom replacement windows and doors are designed to install easily without disturbing paint, siding or stucco.
- Custom fit brick mould with nailing flange
- Custom fit replacement brick mould
- Custom fit with nailing flange
- Custom fit replacement insert
Trimline Brick Mould
Easily add a custom look with our new Trimline brick mould featuring a more traditional contoured face.
Features:
- Now available in shapes!
- Trim face easily snaps on to hide fasteners
- Available in 1-1/2 or 2-inch
- Multi-chambers and welded corners to match the strength of our windows
- Sill nose available
- Available in White, Tan, and Sandlewood
- Available in Classic Series and Thermo-Fit
Distinctive Grid Styles
Flat or contoured grids between the glass are available in a variety of configurations and colors to match our vinyl windows.
Contoured Grid
ProfileFlat Grid
ProfileGrid configurations vary by window style and size. Please ask your dealer for more information about grid options for specific window styles and sizes.
Colors
Color Options
Exterior Frame Colors
In addition to standard white vinyl, frames are available in two other exterior colors to match virtually any home style or color.
White
Tan
Sandlewood
Interior Wood Laminate Colors
Not available on Single-Hung windows.
Get the warmth and classic beauty of wood with the comfort and ease-of-maintenance of vinyl. At Thermo-Tech, we never stop improving our vinyl windows and doors. We always start with expert design, durable construction and maintenance-free 100% virgin vinyl. But it’s the finishing touches that are turning heads – like our wood laminates featuring the warmth of wood and the maintenance-free insulating power of vinyl.
Light Oak
Dark Oak
Wood laminates available with White or Sandlewood exteriors only.
Glass
Glass Options

High Performance LoDz 272/Argon
Double insulated glass with LoDz 272/Argon on one glass surface
Thermo-Tech windows come standard with double-pane insulated LoDz 272 glass featuring two panes of double-strength glass with an argon gas filled airspace for superior insulation. This option improves heating efficiency by nearly doubling the insulating power over ordinary clear glass, and blocks enough solar heat that cooling loads can be cut by 25% or more. Fading of furniture, floors, and drapes is reduced by filtering out 84% of the Sun’s harmful ultraviolet rays. Thermo-Tech products utilizing this High Performance Glass meet Energy Star guidelines in casements, fixed casements, direct sets, and awnings.

Premium High Performance Lodz 366/Argon
Double insulated glass with Lodz 366/Argon on one glass surface
Our double-pane insulated Lodz 366 heat-reflecting glass adds even more insulating power for premium thermal performance. Double-strength heat-reflecting glass with an Argon filled airspace delivers a balance of solar control, thermal performance, and high visibility to optimize home energy savings and comfort. Plus, this option provides additional fade protection by blocking 95% of the Sun’s harmful ultraviolet rays. Thermo-Tech products utilizing this Premium High Performance Glass meet Energy Star guidelines in casements, fixed casements, direct sets, and awnings.

Ultimate High Performance Lodz 366/Argon/i89
Double insulated glass with Lodz 366/Argon on one glass surface and i89 on interior surface
Thermo-Tech’s Ultimate High Performance glass delivers a “twin punch”. It offers all the benefits of our Premium High-Performance glass while maximizing thermal and visibility benefits, compared to other double-pane options, by adding a LoĒ i89 coating on the interior glass surface. Together this combination ensures the greatest thermal performance in all dual-pane applications. Thermo-Tech products utilizing this Ultimate High Performance Glass meet Energy Star guidelines in single hungs, double hungs, casements, fixed casements, direct sets, sliding windows, awnings, and patio doors.

Energy Guard Triple Insulated Glass Energy Star Most Efficient
Triple insulated glass with high performance Lodz 366/Argon on two glass surfaces
Get the maximum energy savings, comfort, ultraviolet protection, and the superior sound proofing of Thermo-Tech’s Energy Guard glass. Energy Guard windows incorporate three layers of double-strength glass with Lodz 366 on two glass surfaces, and two half-inch argon gas filled insulated air spaces. This option meets Energy Star’s Most Efficient criteria in the North/Central, South/Central, and Southern Zones, and is available in casements, fixed casements, direct sets, and awnings.

Energy Guard PLUS Triple Insulated Glass Energy Star Most Efficient
Triple insulated glass with high performance LoDz 272/Argon on two glass surfaces
Energy Guard PLUS triple-pane glass meets Energy Star Most Efficient standards for many tough climates including the Northern zone. Get maximum energy savings, comfort, ultraviolet protection, and sound proofing PLUS the added solar heat-gain necessary to optimize home heating during frigid Northern winter months. Energy Guard PLUS utilizes three layers of double-strength glass with LoDz 272 on two glass surfaces, and two half-inch argon gas filled insulated air spaces. Energy Guard PLUS is available in casements, fixed casements, direct sets, and awnings.
Other Glass Options
Obscure
Obscure glass protects your privacy while allowing abundant light to enter the room. Choose from a variety of colors and texture patterns for a translucent to semi-opaque effect.
Grey or Bronze Tinted
Tinted glass provides additional shading from direct sunlight and warm conditions. A variety of tones and thicknesses are available.
Tempered Safety Glass
Tempered safety glass is extremely strong and often used for its safety characteristics. If tempered safety glass does break, it breaks into small pieces without sharp edges. Standard for patio door, side lights and even bathroom shower and tub enclosures, tempered safety glass is ideal for reducing the likelihood of injury in the event of breakage.
Replacement Window Options
Replacement Window Options
Custom-sized replacement frame system. More options for a truly custom fit!
Thermo-Fit custom replacement windows and doors are designed to install easily without disturbing paint, siding or stucco.
- Custom fit brick mould with nailing flange
- Custom fit replacement brick mould
- Custom fit with nailing flange
- Custom fit replacement insert
Trimline Brick Mould
Easily add a custom look with our new Trimline brick mould featuring a more traditional contoured face.
Features:
- Now available in shapes!
- Trim face easily snaps on to hide fasteners
- Available in 1-1/2 or 2-inch
- Multi-chambers and welded corners to match the strength of our windows
- Sill nose available
- Available in White, Tan, and Sandlewood
- Available in Classic Series and Thermo-Fit
Grids
Distinctive Grid Styles
Flat or contoured grids between the glass are available in a variety of configurations and colors to match our vinyl windows.
Contoured Grid
Profile
Flat Grid
Profile
Grid configurations vary by window style and size. Please ask your dealer for more information about grid options for specific window styles and sizes.