OKNA Windows: Premium Windows, Proven Performance
We recommend OKNA windows, one of our most popular installs, for their high-performance, energy-efficient, high-quality windows because they meet our exacting standards. OKNA windows are known for durability, performance, and long-term value.
OKNA windows earn that distinction through advanced engineering, precision manufacturing, and proven long-term performance. We do the research, so you don’t have to – installing windows built to last, enhancing your home’s appearance, and keeping your family comfortable year-round.
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American-Made | Precision Engineered | In-House Installers | Lifetime Service Warranty
Smarter Glass for a More Comfortable Home
OKNA windows use HeatSeal® glass with ClimaGuard® Low-E technology to control heat, light, and comfort without sacrificing clear views or natural daylight. This advanced system plays a key role in making OKNA replacement windows some of the most energy-efficient options available today.
What makes it different:
- 11 microscopically thin, optically tuned layers manage heat and light with precision
- Engineered to your unique climate conditions, home orientation/sun exposure, and performance goals
- Reflects unwanted solar heat and UV rays while letting in natural light
- Reduces summer heat gain and winter heat loss for year-round comfort
- Clear, neutral appearance — no dark tint or mirror effect
- Helps lower energy costs and protects furniture and flooring from sun damage
These real-world benefits are often reflected in OKNA windows reviews, where homeowners highlight comfort improvements and reduced energy costs after installation.
Unlike tinted glass, OKNA’s spectrally selective Low-E coatings reduce heat without dimming your home — delivering efficiency, comfort, and clarity in one engineered system. With this custom-engineered approach, OKNA windows consistently outperform standard replacement windows in real-world conditions.
| Feature | OKNA Windows | Standard Replacement Windows |
|---|---|---|
| Air infiltration | Industry-leading | Varies widely |
| Frame construction | Fully welded | Often mechanically joined |
| Glass packages | Advanced, customizable | Limited options |
| Long-term durability | Designed for decades | Dependent on install + materials |
| Made in USA | Yes | Sometimes |
What Homeowners Notice after OKNA installation
- Rooms feel more even in temperature
- Outside noise noticeably reduced
- HVAC runs less frequently /lower bills
- Fewer cold drafts and less heat gain
- Windows feel solid and quiet
- Windows operate effortlessly
What OKNA Window Is Right for My Home?
Custom-Made for a Perfect Fit
Since all OKNA Windows products are custom-made, you can be sure of a perfect fit every time — which means less hassle during installation and results that look like they were always meant to be there.
OKNA Starmark Evo 7500
OKNA Starmark Evo 7500 Casement Windows offers beauty and functionality. The superior design makes it ideal for not only single windows but also for multiple assemblies such as bows, bays, and picture windows, as well as your own original combinations. A beveled screen frame offers the appearance of wood molding for added beauty.
OKNA Enviro-Star 800
The OKNA Enviro-Star 800 is OKNA’s premier replacement window. The Enviro-Star combines superb craftsmanship with an Old-World look and feel. This series offers a myriad of glass and structural options to seamlessly blend with any décor, while providing the utmost in energy efficiency.
OKNA Insul-Tec 500
OKNA Insul-Tec 500 The OKNA Insul-Tec 500 combines excellent craftsmanship with a traditional look and feel. This series offers all the benefits you have come to expect from vinyl windows, with a variety of options to make your home energy-efficient and enhance its beauty. Learn more about Insul-Tech 500
Our Reviews Speak for Themselves
Our reputation for client service excellence means everything to us. Our Client Care process ensures you are informed throughout your project, with no surprises. As you can see from our hundreds of 5-star reviews, we consistently exceed our clients’ expectations. We look forward to showing you the “WoW difference” in home improvement contracting.
Everyone at WoW went above and beyond, and exceeded my already high expectations. Our house is now warmer, quieter, and looks so much better!
Anne D.
Simply put, it was one of the best contracting / house project experiences we’ve had.
Trey P.
What it's like to install OKNA windows with WoW
OKNA windows are engineered to exacting standards — which is why we install them using our own trained, in-house crews. Here’s what you can expect:
- In-home evaluation focused on comfort, layout, and usage
- Product selection tailored to your home, not a one-size package
- Professional installation by trained, in-house crews
- Final walkthrough and performance check
Every OKNA window we install is backed by WoW’s lifetime service warranty, so your investment is protected long after installation day.
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