Frequently Asked Questions

How do I know what manufacturers participate in the NFRC Program?

Look for the NFRC temporary and permanent labels on the product, or view a complete list of all manufacturers that are participants.

Does NFRC sell, fix, or install windows, doors, or skylights?

No, NFRC administers a third party certification and labeling program to provide the buyer with verified product information.

Can NFRC recommend a certain manufacturer for the product type that I am looking for?

No, we cannot recommend a specific manufacturer. However, our ratings guarantee that each product was tested the same way, under the same conditions.

My product does not have a NFRC label on it, but the retailer is saying that it is NFRC-certified. What should I do?

If the product does not have a sticker on it, it is not considered a certified window (regardless of whether it is certified or not). Labels CANNOT be e-mailed, faxed, or sent separately from the window. If they are missing, the manufacturer is required to do on-site labeling.

Are there any federal tax incentives for buying energy-efficient windows?

Unfortunately not, but you can search by state for incentives for renewables and efficiencies.

I removed the labels from my window. How do I get the glue off of the glass?

Use a citrus based cleaner. Just make sure you wipe the residue off with a damp cloth.

How can the installation affect the energy performance of my product?

NFRC performance ratings do not take into account how a product is installed. You can purchase the best product available, but if it is not installed well, it will not perform as well as it could.  In order to ensure that the installation is done properly, ask the manufacturer to recommend an installer. Be aware that in some cases, your warranty will not be valid if your windows, doors, or skylights were installed incorrectly by a third party.

My product is NFRC-certified, and I do not have the temporary label. How do I find energy performance information about the product?

Each certified product should have a permanent label provided by their Inspection Agency. These labels can be found between the panes of glass, the bottom of the sill, and sometimes along the side or top of the product.