NFRC FenStar® Certification Program
Revised Documents Published
NFRC has released revised documents in the FenStar® Certification Program. The documents provide procedural guidance for manufacturers and labs for verification testing.

This is the list of the revised documents available --

All new versions of the documents are available to be downloaded. Each procedure describes in greater detail how manufacturers and staff are going to work with each other to perform the verification testing.

The previous published documents for the FenStar Certification Program can still be found on the NFRC FenStar Certification Program webpage.

Questions regarding the FenStar Certification Program can be directed to General comments can be directed to .

Thank you!

NFRC envisions a future where every window, door, and skylight purchase decision is made using the NFRC label to evaluate energy performance.