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Official product verification

NFRC Window & Door Rating Lookup

Use the National Fenestration Rating Council's official Certified Products Directory to verify performance for the product line and exact configuration on a quote. OCWR does not copy or republish the NFRC product database.

Ratings to compare

U-factor
The rate of heat transfer through the whole product; lower values indicate less heat flow.
Solar Heat Gain Coefficient (SHGC)
The fraction of solar heat admitted through the whole product; lower values admit less solar heat.
Visible Transmittance (VT)
The fraction of visible light transmitted through the whole product.
Air Leakage (AL)
An applicable tested measure of air passing through the product assembly under specified conditions.

Product line is not the exact configuration

One series can have multiple operators, frame types, glass packages, spacers, gas fills, grids and sizes. Those choices can change the certified values. Match the manufacturer, product line, operator type and configuration on the quote rather than relying on a brand-level claim.

How to check a quote against the NFRC label

  1. Ask for the manufacturer, series, operator type and complete glass-package description.
  2. Record the U-factor, SHGC, VT and any listed Air Leakage value from the quote or label.
  3. Use the official directory to locate the matching product line and narrow to the same configuration.
  4. Compare the certified values with the project's applicable energy-code requirements.
  5. Keep the NFRC label and product documentation with the permit and project records.

A Certified Products Directory (CPD) number can help identify a certified product record, but it does not replace matching the exact configuration and rating values.

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