Vi6 Series
Performance & Ratings
Built for mid-rise residential buildings, our ratings far surpass the required standards, often achieving Architectural Window quality grades. By delivering our windows with fully approved paperwork, we eliminate headaches. Ensuring that every window and element is up to code is an essential part of what we do.


The SeeUpvcâ„¢ Advantage
When it comes to quality balanced by durability balanced by affordability, materials are quite, well, material. More than the specifications, designs and process, the materials used to build a window will dictate the window’s longevity and user experience.
Steel reinforced uPvc profiles are ultra-durable with ideal thermal coefficients. The result is a more affordable, low-maintenance, high-value product. Achieving the perfect balance between expectation and excellence—Vistaza products are perfectly suited for mid-rise developments.
Structural Performance
Built for mid-rise residential buildings, our ratings far surpass the required standards, often achieving Architectural Window quality grades even when a Commercial Rating would suffice. Unlike other manufacturers, our windows are tested and rated in fully assembled units to the CW PG65Â standards.

Performance Class:
CW-65
Exceeding mid-rise standard requirements in the AAMA/WDMA/CSA 101/I.S.2/A440 testing.

3X Water Leakage Protection
Passes high-rise ASTM test E331Â and ASTM E547 at 12.11 psf of pressure, achieving 3 times the required CW penetration resistance.

4X Air Infiltration Resistance
Passes AAMA test E283 at 6.27psf, achieving 4 times the CW standard.

Design Test Pressure:
Our profiles are reinforced with .078″ (2mm) steel, 40% thicker then standard uPVC. Providing extra strength with ASTM E330 design pressure at ±65.16 psf (3120 Pa)

Energy & Sound
More than windows, our products optimize their environment and are one with the universe. Achieving ratings of the lowest U-Factor (heat transfer rate), lowest SHGC (solar heat gain coefficient), best OITC (outdoor-indoor transmission class—sound reduction rating), and with the right options can give you complete Net Zero similar to Passive House ratings.
Rating / Glaze | ThinE | MidE | MasterE | MaxE |
IGUÂ (Total width) | 15/16″ | 1.25″ | 1.5″ | 2 3/32″ |
U – Factor (Heat transfer rate) | .26 | .27 | .27 | .21 |
SHGCÂ (Solar heat gain coefficient) | .39 | .38 | .34 | .33 |
OITC / STCÂ (Sound reduction) | 25 / 32 | 32 / 38 | 37 / 45 | 40 / 46 |
Results are based using our Crystal annealed glass, upgrading to GrayT or BronzeAge glass may result in even higher energy efficiency.
Rating | ThinE | MidE | MasterE | MaxE |
IGUÂ (Total width) | 15/16″ | 1.25″ | 1.5″ | 2 3/32″ |
U – Factor (Heat transfer rate) | .27 | .27 | .27 | .24 |
SHGCÂ (Solar heat gain coefficient) | .25 | .24 | .22 | .21 |
OITC/STCÂ (Sound reduction) | 27 / 33 | 34 / 39 | 38 / 46 | 40 / 47 |
Results are based using our Crystal annealed glass, upgrading to GrayT or BronzeAge glass may result in even higher energy efficiency.
Rating / Glaze | ThinE | MidE | MasterE | MaxE |
IGUÂ (Total width) | 15/16″ | 1.25″ | 1.5″ | 2 3/32″ |
U – Factor (Heat transfer rate) | .26 | .26 | .26 | .22 |
SHGCÂ (Solar heat gain coefficient) | .29 | .29 | .26 | .25 |
OITC/STCÂ (Sound reduction) | 28 / 33 | 34 / 38 | 38 / 43 | 39 / 44 |
Results are based using our Crystal annealed glass, upgrading to GrayT or BronzeAge glass may result in even higher energy efficiency.
Safety
Every window built with your wellbeing and protection in mind.

Fall Prevention
All our operable windows are built for large multi-family buildings with integral NYC Dept of Health approved limiters to uphold safety standards.

Fire Safety
For best fire protection, our windows are evaluated in accordance with the Standard Test Method for Surface Burning Characteristics of Building Materials.

Forced Entry Resistance
To keep you and your family safe and secure, our Vi6 series pass the standard forced entry measures. Windows: ASTM F588 – Grade 10. Doors: AAMA 1304, 300 lb point load.
A-Z Process
Controlling the process from start to finish ensures best-in-class quality and pricing.