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NFRC Simulations

BEE is accredited by the National Fenestration Rating Council (NFRC) making us an NFRC-Accredited Simulation Laboratory. Our NFRC thermal performance ratings are specified by the International Code Council (ICC), including the residential, energy conservation, and building codes. NFRC ratings and certification are also used to demonstrate compliance with the ENERGY STAR Windows Program. Our clients include both manufacturers and commercial builders.

BEE team member showing internal design of energy efficient window
Commercial Builders


We help commercial and residential window, door, and skylight manufacturers by supplying the necessary U-factor, SHGC, VT, and CR ratings for product certification, energy performance ratings, building energy code compliance, and voluntary programs like Energy Star. BEE has also helped numerous manufacturers ensure that new products incorporate design details that meet ever-increasing performance goals as well as code compliancy and certification.

Commercial Builders

Using CMAST simulation software, we also help builders get project ratings quickly and efficiently with NFRC’s Component Modeling Approach (CMA).

For questions about our services, pricing, the process, or our National Fenestration Rating Council Certification, please contact our Simulator in Responsible Charge (SIRC) Bret Joiner.

Our Services

> NFRC 100: Procedure for Determining Fenestration Product U-factors.

> NFRC 200: Procedure for Determining Fenestration Product Solar Heat Gain Coefficient and Visible Transmittance at Normal Incidence.

> NFRC 500: Procedure for Determining Fenestration Product Condensation Resistance Values.

> AAMA 507: Standard Practice for Determining the Thermal Performance Characteristics of Fenestration Systems Installed in Commercial Buildings.

> NFRC CMA: Component Modeling Approach: Procedure to Determine Performance Rating Using Glazing, Frame and Spacer Components for Commercial Products.

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