Made from vinyl that is stronger and more energy efficient than ordinary vinyl you can choose pella 250 series windows with confidence.
Pella vinyl windows u value.
Our unique vinyl formula is performance tested for excellent weathering color retention and durability.
We have several products that are identified as the energy star most efficient meaning they meet more stringent energy.
Pella 350 series windows are incredibly strong and durable and can withstand extreme conditions.
Energy star certified windows and doors help to conserve energy.
View sizes and design data.
Find a vinyl window that complements your home.
Add transoms or adjacent windows for flexible combinations.
Built to order in standard sizes or custom sizes in 1 8 increments.
Design data available for egress vent opening clear opening visible glass and frame area.
Pella 350 series windows are available in standard and special sizes.
Pella 250 series windows offer more of everything you love about vinyl.
Vinyl windows from pella are easy to care for affordable and provide exceptional energy efficiency.
So in your example 1 where they show the window has a u value of 0 27 it s because the are using their lowest quality and least expensive frame and glazing.
The u value of windows depends on 1 quality of frame 2 number of panes of glass 3 argon gas 4 low e coatings 5 air space between panes etc.
With new or replacement windows and patio doors that are energy star certified you can help lower your utility costs and enhance your home s comfort.