Top Selling

Perfect Window

Energy Efficient

with ecoSmart

Triple Glass


Window Styles, click a style to learn more

Double Hung



Bay & Bow


Thermal King windows are the top-selling insulated replacement windows in the Kansas City Metro.

Thermal King windows are built for strength, efficiency and durability, our windows are good for you, good for your home, and good for the environment.

Our patented windows not only save energy dollars, they save you time. Because the strong fiberglass reinforced frame is clad in durable vinyl, there is virtually no maintenance so you’ll never have to scrape and repaint your window frame ever again! And the convenient tilt-in feature on the double-hung model makes Thermal King windows easy to clean.

Built right for added strength. Thermal King windows are entirely fusion welded, an advanced manufacturing technique. Unlike windows that use staples, screws or caulk to hold the frame corners together, Thermal King fusion welds vinyl sections together to create a solid one-piece unit that won’t come loose or weaken over the years.

New Generation™ Vinyl for maintenance freedom. Every Thermal King window is constructed with rugged maintenance-free uiPVC (polyvinyl chloride). Thermal King New Generation Vinyl windows will never get stuck like wood or metal windows because they don’t sweat or deteriorate from corrosion, pitting or rot. Wash them with soap and water and they’ll look like new year-after-year. We also use only the highest quality E-Gard ™ locking and operating hardware, which is resistant to damage from chemicals, corrosion and ultra-violet light.
Built tight to keep air out. Window leakage is a major cause of a home’s energy loss. Thermal King window sashes feature heavy-duty weather stripping, and the double-hung and sliding windows feature full meeting rail interlocks, creating a double barrier to air and water. With this state-of-the-art insulating method, you should begin to notice a difference in your indoor comfort and fuel bills as soon as your Thermal King windows are installed!
Guaranteed For Life. Thermal King believes so strongly in the durability of its products that it offers a limited lifetime warranty on the entire window unit — and it’s transferable. In addition, Thermal King windows are backed by a lifetime non-prorated seal failure and glass breakage warranty.

Thermal King ecoSmart energy efficient windows feature:

ecoSmart Glass Systems windows contain the very best in modern thermal efficiency technology with the Maxuus 10 glass pack system (triple pane, double Low-E with krypton). The air between glass panes is replaced with (rare/noble) gases or krypton which is about 190%** denser than air. This safe, naturally occurring gas helps block the transfer of heat better than air, while deadening sound for increased energy efficiency and peace and quiet in your home. The result is an insulated glass unit that is ten times more energy efficient than a single pane of glass.

**Figures courtesy of Linde Gas, Inc.

Patented * R-Core® insulation

U.S. Patent Number 4,516,356
The R-factor (insulation value) per linear inch of our UniFrame window frame is seven times greater than that of an ordinary vinyl frame. The secret is our patented R-Core® insulation — a high-density solid polyurethane insulation like the kind used in many refrigerator and freezer doors. And, we pre-expand it so there are no voids or settling, giving it optimum insulating power and sound deadening properties.

Warm-edge lntercept® glass spacer system

Our advanced insulated glass spacer system virtually eliminates cold-spot corners, frost, fog and condensation. Like all spacers, it works by maintaining a consistent space between the two panes of glass to interrupt the natural flow of heat to cold. Unlike other spacers, Intercept® is a continuous U-shaped channel that flexes as the glass expands and contracts. The result is a stronger, more energy-efficient insulated glass unit and a reliable seal for the life of the window.

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