SilentGuard® by Thermal Windows EnergyStar Partner

SilentGuardIntroducing the SilentGuard® by Thermal Windows, a replacement window line specifically manufactured with SilentGuard, our special noise-reducing technology. SilentGuard® windows are engineered to provide the optimum performance for your budget and your specific sound control need. All this exceeds industry standards while maintaining the same thermal performance, structural integrity, and maintenance reduction you have come to expect from us.

Features & Benefits

Energy Savings
  • Peak PerformanceTM Glass contains dual panes with Low-E, enhanced with argon gas and a warm-edge spacer system for exceptional thermal performance
  • Dual compression seals prevent air infiltration
  • Weather-Stripping virtually eliminates air and water infiltration
  • Fully interlocking sashes prevent air infiltration at meeting rail
  • Foam Inserts combined with dead air space chambers boost thermal properties
  • Dual Seals on Sill prevent air infiltration
Built to Last
  • Solid Vinyl Construction will not chip, peel or rot and never requires scraping or painting
  • Compression Fit Fusion-Welded Mainframe and Sashes for maximum strength and reduced air infiltration
  • Parallel I-Beam Construction provides increased strength, durability and structural integrity
  • Multi-Chambered Construction provides enhanced structural integrity
  • Integral Pocket Header provides clean interior appearance and prevents air infiltration
  • Sloped sill and dual drainage with weep system that significantly improves water drainage
Life Made Easier
  • Lifetime Warranty, Lifetime Insulating Glass Warranty, Lifetime Glass Breakage Warranty and Lifetime Screen Warranty for your peace of mind
  • Balance covers provide a clean, aesthetically pleasing appearance
  • Extruded vinyl lift rails for easy sash operation
  • Beveled screen track stiffens frame and enables easy screen removal
  • Dual Teck Locks offer the dual functionality of security as well as allowing the window to tilt in for easy cleaning by engaging the lock lever
  • Dual night latches for ventilation
  • Locking Fiberglass Half Screen is standard*
  • Locking Zinc Pivot Pins (Double Hung) prevent accidental sash removal while cleaning your windows

SilentGuard® Sound Reduction

SilentGuard® Sound Reduction Windows

provide enhanced noise abatement performance to the SilentGuard Window. Sounds are measured in decibels (dBs). An STC rating is assigned to a window or door to designate its capacity to block sound. The higher the decibel the higher the STC rating needed. Typical windows have STC ratings in the 25-28 range. By comparison, the Silent Guard Window family has an STC rating of 34, reducing exterior sound by 43% when compared to the average single pane aluminum window.

Turn the Outside Volume Down with SilentGuard®

When sound control is needed, SilentGuard Windows offer advanced noise control performance for the majority of annoying sounds that routinely affect us all. From barking dogs to loud lawn mowers, the STC 34 rated SilentGuard option is designed to control these most common nuisances.

SilentGuard® is also available in these additional styles:
Series 7000 slider


picture windows

Picture Windows

Sound Transmission Class (STC)

Sound transmission class (STC) ratings give a single value to acoustical performance for a window. STC is determined by a weighted average of Sound Transmission Loss (TL) values taken over 16 frequencies, which are fitted to a curve in a method defined by the ASTM E413 Classification Standard for Rating Sound Insulation. The higher the STC value, the better the rating and the better the performance.

Silentguard Infographic


Energy Efficient Glass Options

Thermal Windows & Doors is proud to manufacture vinyl replacement windows and doors with the ENERGY STAR® label. Every ENERGY STAR qualified window is independently certified by the National Fenestration Ratings Council, or NFRC, to perform at or above strict levels set by the U.S. Department of Energy. The rating gives you the tools needed to compare window performance.

The glass system in the SilentGuard Window is specially designed to provide noise abatement through the use varying glass thicknesses. As sound waves travel through different types and thicknesses of glass, they are broken into different frequencies, thereby reducing their intensity.Silent Guard Double Hung Windows feature a dual-glaze 13/16-inch thick insulating glass unit, with one lite of 3/16” glass and one lite of 1/8” glass.

Peak PerformanceTM Glass

Our Peak Performance Glass system combines one lite of high-performance Low-E Glass and one lite of clear glass, sealed together with a warm-edge spacer system. The air space between the two is enhanced with Argon, and insulating gas. Consider the Peak Performance Eco Glass system which combines one lite of high-performance triple coat Low-E Glass and one lite of clear glass, for climates where solar control is important.

ENERGY STAR Climate Zone Map

Climate Zone map

Criteria for Windows

Climate Zone map

Standard Window Features

Dual Tech Lock

Dual Tech Lock

Night Latch

Night Latch

Locking Half Screen

Locking Half Screen

STC Rating 34

When moderate sound control is needed, the SilentGuard offers advanced noise abatement performance for the majority of annoying sounds that routinely affect us all. The STC 34 rated Series 9300 was designed to control most common noise nuisances.

For even more sound control, SilentGuard offers an advanced line of window products with higher STC ratings that go as high as STC 48 – an industry leading performance* mark. See your Thermal Windows & Doors representative for more information.

Vinyl Color Options*





BrownBrown Laminate

Exterior/White Interior

Painted Exterior Finish Options*

Custom color match is available

American ClayAmerican Clay
Safari BrownSafari Brown
Brick RedBrick Red

Wood Grain Interior Options*

Natural OakNatural Oak**

Paintable/Stainable and Standard with Earthtone Hardware

Honey OakHoney Oak***

Standard with Mocha Hardware

Caramel OakCaramel Oak***

Standard with Mocha Hardware

Grid Options

Choose from a variety of decorative grid patterns, styles and colors. All grids come between the glass for easy maintenance and a clean, modern look.

Grid options include:
  • 5/8″ flat
  • 5/8″ contoured
flat grid


contoured grid


Screen Options*

Fiberglass half screens come standard with double hung windows or choose from:

  • Half screen: In fiberglass, charcoal aluminum or Invisi-Screen®
  • Locking half screen: In fiberglass, charcoal aluminum or Invisi-Screen®
  • Full screen: In charcoal aluminum or Invisi-Screen®
Optional Full Invisi-Screen®

Full-frame screen for sharp, bright visibility with increased insect protection.

Invisi-Screen ComparisonCompare Invisi-Screen® visibility (left) with Conventional Screen (right)

Hardware Options

Brushed Nickel

Brushed Nickel





Manufacturer reserves the right to substitute components as necessary.

*Screens are not meant to restrain a child from falling through an open window.

**Device screen may affect color shown. Please refer to actual window sample when selecting colors. The availability of dark color options can vary by region. Ask your sales representative for details.

***Brown Laminate Exterior is not available with Woodgrain Interior Finishes. Exterior may be painted if Brown color is desired. Additional charges apply.

****Earthtone lock comes standard.

*****Mocha lock comes standard.

******Standard on Honey and Caramel Oak. Not available on White and Earthtone.