We understand that exceptional window and sliding patio door performance isn’t just about the glass – it’s about the synergy between the window profile and the glass package. The impressive performance of our systems stem not only from the inherent qualities of fiberglass but also from the crucial interplay between the window profile and the selected glass package.

  Performance Class Air Infiltration Design Pressure
Casement Window CW-PG80 0.02 80
Awning Window CW-PG75 0.04 75
Picture Window LC-PG60 <0.01 60
Fixed Casement Window CW-PG60 <0.01 60
Sliding Patio Door LC-PG45 0.19 45

Understanding the Key Performance Metrics

Performance Class
The Performance Class denotes the category and general use-case of the window based on its performance attributes.
– R (Residential): Suitable for single-family homes and similar structures.
– LC (Light Commercial): Designed for low-rise, multi-family dwellings and commercial buildings.
– CW (Commercial Window): Appropriate for higher performance needs and larger sizes, often used in mid-rise buildings.
– AW (Architectural Window): Highest performance class, used for high-rise buildings and applications requiring exceptional performance.

Air Infiltration
The air infiltration rating measures how much air passes through a window when it’s closed and locked. It’s a key indicator of a window’s ability to prevent drafts and maintain indoor comfort.
Rating Units: The result is usually reported in cfm/ft².

Design Pressure (DP)
A window’s design pressure (DP) rating tells you how much wind pressure it can safely handle without breaking or failing. It’s like understanding the strength of your window against the wind.
Here’s how it works:
– The Design Pressure number indicates the wind pressure the window can withstand. For example, a window with a DP rating of 30 can handle wind speeds pushing against it equivalent to a pressure of 30 pounds per square foot.
Think of it like a stress-test for your window. The higher the DP rating, the more resilient the window is to strong winds.

The Profile-Glass Partnership 

While fiberglass frames provide a strong foundation for energy efficiency, it’s the combination with the right glass package that unlocks peak performance.

  • Frame Design: Fiberglass window profiles are engineered with multiple chambers and insulating materials, further enhancing their thermal efficiency.
  • Glass Technology: Modern glass packages incorporate features such as multiple panes, low-emissivity (Low-E) coatings, and gas fills to minimize heat transfer and control solar gain.
  • Customizable Solutions: The ability to tailor the glass package to your climate and needs ensures optimal performance. In colder regions, prioritize a low U-factor. In hotter zones, a low SHGC is crucial.

Experience the Difference

Discover the unparalleled performance of Enerlux fiberglass windows and sliding patio doors. By understanding the key metrics and collaborating with a knowledgeable window professional, you can choose the ideal combination to create a comfortable, energy-efficient, and visually appealing home or building.

Contact us today and learn more about our windows and doors! Click the Learn More button!

Contact us today and learn more about our windows and doors! Click the Learn More button!