About the Pella Impervia Composite Casement Window
Casements crank open to the left or right providing great ventilation and a secure air-tight seal. These combination windows typically come in 2 or 3 lite configurations, which just mean they are two or three windows, but it is all one sturdy unit.
The Pella Impervia Series fiberglass composite casement window delivers the quality look of a painted wood window, superior durability, low maintenance, and incredible energy efficiency.
The Pella Impervia Composite Casement windows can be combined with other windows, such as a picture window or other casements, to provide a dramatic appearance. We automatically include the ENERGY STAR® qualified glazing upgrade with AdvancedComfort Low-E glass and Argon gas. Other features include:
- Also comes in 2 or 3 unit configurations
- Made from Duracast material, Pella’s five-layer engineered fiberglass composite, which withstands extreme heat and cold
- Features durable, low maintenance power-coat finish for look of painted wood. Available in white, tan, morning sky grey, brown or black with optional dual-color frame of white interior and colored exterior
- Includes half or full fiberglass screens or optional high transparency screens that allow more air and natural light to flow into your home
- Comes with color matched crank-style lock, also available in bright brass, satin nickel, and oil-rubbed bronze
- Available in a variety of patterns with 3/4” contour GBG (grids between the glass) grids.
- Lifetime limited non-transferrable manufacturers warranty on unit and mechanical parts with a 20-year transferable warranty for the insulated glass
The lower the number, the better. To meet Energy Star requirements, windows must have a u-factor at or below 0.27.
The higher the number, the more light is transmitted. VT values typically range from 0.30 to 0.70.
The lower the number, the more it will help reduce the use of air conditioning and energy use. In cold climates, a higher SHGC is desirable to collect heat from sunlight. SHGC typically ranges from 0.25 to 0.80.
Solar Heat Gain Coefficient