Bi-Fold Windows 6×4 with Thermal Break R2LI | Bifold Window | Accordion Window

These sleek energy efficient 6×4 bi-folding windows with thermal break are perfect for opening your home up to the outdoors. Whether you want to connect your kitchen to the patio or you want to add a sunroom to your house, these double-pane accordion windows are the perfect fit.

Why is this window superior?
These double pain aluminum windows are manufactured to be energy efficient. The thermal break on the window pane and tight seals around the window make these very efficient windows.

Which direction does the window open?
This is our R2Li window which means from the inside of the home it will open Right to Left with the sash being on the inside of the home. Please contact us if you have questions or need a different model.

How do you read a NFRC label for windows?
NFRC certified product allows consumers to compare the efficiency of windows. NFRC labels for windows include ratings for U-factor, Solar Heat Gain Coefficient (SHGC), Visible Light Transmittance (VT), and optionally Air Leakage (AL) and Condensation Resistance (CR).

U-Factor measures how much heat escapes through a window. This is important if you live in a cold region. The lower the number the less heat will escape.
Range: 0.20 – 1.20

SHGC measures how much solar radiation is admitted through a window. This is important in hot regions. The lower the number the less heat is admitted.
Range: 0 – 1

VT indicates how much visible light is transmitted through a window. A higher number means more natural light.
Range: 0 – 1

The air leakage rating tells us how much air will enter a room through the window. A lower number indicates less air will pass through cracks in the window assembly.
Range: 0.1 – 0.3

All windows are prone to condensation The condensation resistance rating measures how well a window will resist the formation of condensation on the inside surface. Lower is better.
Range: 1 – 100

Please allow 10-14 days for freight shipping.

Looking for a different size or color? Product questions? Call us!