FAQ Knowledge Articles

Corner units are not currently certified for NFRC and will not receive an NFRC label.  Individual unit values should not be compared to the corner units.  Due to the construction of the corner unit these values can be significantly different than an individual unit.

For more information, see:
What is NFRC / fenestration?
Where can I find Energy Information online?
What options does Marvin offer for 90 degree corner windows?