Okna Enviro-Star 800 Series

The Enviro-Star 800 Series combines the  elegant look of traditional wood windows, with  the high performance and easy maintenance of modern vinyl.

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We Created a Better Way to Do Business

Simply put — we believe that improving your home should be enjoyable. That is why we spent years designing our consultations, installations, and client care experiences to provide every client with a stress-free home improvement experience. Founded in 2005, Windows on Washington has become one of the area’s most respected home improvement companies because we make our clients' homes more beautiful, comfortable, and energy efficient.

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Premier People

Honest. Loyal. Experts in their field. That’s how we describe our team members. Many of them have been with us for over 18 years! When you want your project done right, always ask WHO will be doing the work.

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Premier Products

After more than 18 years in the home improvement industry, we understand the differences between various brands and we choose the products we offer very carefully. We have done a tremendous amount of research so you don’t have to, and we stake our reputation on this knowledge.

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Premier Process

We have a comprehensive 12-step client care process that will keep you up-to-date every step of the way. Our Client Care Team works closely with you so you know your project status at all times!


Enviro-Star 800 Series - Maintenance Free Never Looked so Good

Imagine  the energy efficiency of a modern vinyl window with the traditional, elegant look of a wood window. Okna’s 800 Series delivers classic beauty along with industry leading performance and quality.

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Timeless Design

Everything about the 800 Series is inspired by the traditional wood window, from the beveled profile to the use of handles instead of lift rails typically seen in most vinyl windows. The 800 Series can also be painted to match any exterior, further providing a custom, upgraded look.

Clean Up is A Breeze

Adding to the classic look of the 800 Series is a recessed vent and tilt latch that mimics a real wood window. This design is a hallmark of Okna’s 800 series that not only adds to its visual appeal, but also makes tilting the windows inward for cleaning easier than ever.

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Designed to Perform, and Last

A one-piece sloped seal allows for proper water drainage, while the sill dam wall is mortised into the jamb, thus adding strength and minimizing leaks that may occur at corner seals. In addition, dual weather stripping is also in place to minimize drafts and air infiltration. Every detail of the 800 Series has been meticulously crafted with  beauty, longevity, and energy efficiency in mind.

Strength Behind the Beauty

Design Pressure is a rating used to measure a window's ability to withstand wind and other elements while maintaining structural performance. The 800 Series innovative design provides maximum glass space with a Design Pressure rating that is 99% better than the industry minimum! With the addition of high density composite reinforcement inside the upper sash, the 800 Series is one of the most structurally sound windows on the market.

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Everyone at WoW went above and beyond, and exceeded my already high expectations. Our house is now warmer, quieter, and looks so much better!

Simply put, it was one of the best contracting / house project experiences we've had.

Why Do We Prefer Okna Windows?

Okna Windows has built an industry reputation by combining state of the art equipment, advanced technologies, and dedicated craftsmanship.We know Okna Windows are built to last and will keep your home looking beautiful and your family comfortable for years to come.

For replacement windows, air infiltration (or, Air Leakage) refers to the amount of outside air that can sneak in through tiny gaps or openings in the newly installed windows. Minimizing Air Infiltration helps make your windows more energy efficient by keeping the air you pay to heat or cool… In.  Plus, unlike solar coatings, tight windows improve your energy efficiency 24 hours a day!  One of the main reasons we primarily recommend Okna windows is that they were specifically designed to be air tight.  The Okna EnviroStar Double Hung has an Air Infiltration of .01! That's the best rating on the market!

Design pressure refers to the amount of external pressure that windows are designed to withstand without compromising their structural integrity. It is a measure of the window's ability to resist forces such as wind, water, and other environmental factors.  Okna Windows have some of the highest DP ratings available for residential replacement windows.

Okna Windows are renowned for their exceptional appearance. Crafted with meticulous attention to detail, these windows exude elegance and style. Their sleek profiles and clean lines give them a timeless appeal that can enhance the aesthetic of any home. Okna offers a wide range of design options, allowing homeowners to choose from various styles, finishes, and colors to match their unique preferences and architectural requirements. The quality craftsmanship and precision manufacturing of Okna Windows result in a flawless finish that exudes sophistication.

Okna Windows

Our Reviews Speak
For Themselves

After nearly 2 decades in business, client satisfaction is still what drives us to provide the highest level of quality in our service and in our products. We are proud of our reputation and do everything in our power to continue to exceed our clients' expectations.

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Everyone at WoW went above and beyond, and exceeded my already high expectations. Our house is now warmer, quieter, and looks so much better!

Simply put, it was one of the best contracting / house project experiences we've had.

You Are 3 Easy Steps Away From Project Success!

  • Schedule a No-Pressure Consultation

    One of our experts will discuss your project either in your home or virtually

  • Discuss Your Project

    Our expert will learn about your needs, ask some questions, and suggest the best products and service for your specific project and budget

  • Choose WoW and Relax!

    If you choose to work with us, you can rest assured we will take care of every detail and keep you informed every step of the way

Schedule a Consultation

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