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OKNA 520 Series - Sliding Windows

In addition to being one of the most popular replacement windows here at Wonder Windows, the OKNA 520 Series window has features commonly found on more expensive designer windows.

They've soared in popularity in the past decade, and are a popular favorite here in Rochester. Artisan-inspired craftsmanship, coupled with distinct lines and a neutral design style, the 520 Series is ideal for those seeking a perfect balance of energy efficiency, low maintenance and traditionally modern design.

OKNA 520 Sliding WindowEnhance your window with stainless steel, brass or bronze handles and locking mechanisms.

  • Ideal for both replacement windows and new home construction
  • Dual-layered insulation interlocks tightly for enhanced efficiency
  • Designed to work universally with a broad scope of hardware
  • Innovative condensation and draft-prevention technology
  • Thermal efficiency enhanced by patented Heatseal® spacer
  • Renowned for its chambered maintenance-free vinyl design
  • Rugged 3.25" deep-welded frame for exceptional durability
  • Increased security with locking screens and enhanced locks
  • Comes standard with high-quality fiberglass mesh half-screen
  • Specially designed to withstand harsh WNY weather conditions

OKNA 520 Series - Saver

Warm Edge Dual Heat Shield Argon Technology
NFRC U-Factor:
Air Infiltration:
Solar Heat Gain:

OKNA 520 Series - Choice

Warm Edge Dual Heat Shield Argon Technology with foam filled frame
NFRC U-Factor: 0.26
Air Infiltration: 0.09
Solar Heat Gain: 0.30

OKNA 520 Series - Premium

Warm Edge Triple Heat Shield Argon Technology with foam filled frame
NFRC U-Factor: 0.20
Air Infiltration: 0.09
Solar Heat Gain: 0.26

OKNA 520 Series - Extreme

Warm Edge Triple Heat Shield Krypton Technology with foam filled frame
NFRC U-Factor: 0.16
Air Infiltration: 0.09
Solar Heat Gain: 0.26
 
Overview - Options & Accessories - Performance
 

3-Lite sliding windows

Wonder Windows has a great selection of 2-Lite and 3-Lite sliding windows, to make sure you get exactly the windows that suit your home perfectly.

 

The OKNA 520 Series sliding windows, one of the most popular types of sliding windows in Rochester NY, and are supported by a highly-durable 3.25" welded frame.

OKNA 520 Series sliding windows

 

 

The 520 Series can be ordered with optional bumpers that are OKNA factory-installed - an easy and affordable way to improve performance and sound/acoustic control.   Partial ventilation is something OKNA 520 series owners enjoy most.  Get just the amount of breeze desired, from sliding windows designed for style and superior function.

OKNA 520 Series sliding windows

 

OKNA 520 Series sliding windows

 

Brass wheels mounted on highly-durable rails provide near effortless opening and closing.  This also reduces friction and promotes longer lifespan of your windows.   The 520 Series Deluxe sliding windows come with optional foam extrusion insulation, for unparalleled thermal efficiency and non-existent condensation. 

OKNA 520 Series sliding windows

 

foam extrusion window insulation