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Software

Heat Transfer Modeling Tools for Fenestration Products

NFRC Approved Software List

THERM
THERM 5.2 & THERM 6.3 - A Windows-based program used for modeling and calculating heat flow through framing systems. THERM 5.2 expired as an NFRC approved software program on July 1, 2011 for new certifications, and re-certifications, but may be used by the laboratories to revise products rated using THERM 5.2 until their expiration.
WINDOW 6

 

WINDOW 5.2 & WINDOW 6.3 - A Windows-based program that calculates the overall thermal transmission of window systems. 

WINDOW 5.2 expired as an NFRC approved software program on July 1, 2011 for new certifications, and re-certifications, but may be used by the laboratories to revise products rated using WINDOW 5.2 until their expiration.

Spectral-Data
Spectral Data Library - This library update contains NFRC approved spectral data for the WINDOW analysis program.
OPTICS

OPTICS 6.0 A Windows-based program for analyzing optical properties of glazing system. Note: this software is approved for creating laminates and applied films per NFRC 303 and NFRC 304, respectively.

CMAST icon
CMAST 1.2 - A Windows-based program for rating non-residential fenestration products, consisting of both a web application and client application. This software is only authorized for use with the CMA Product Certification Program.

Other Useful Software
RESFEN
RESFEN 5.0 - A Windows-based program used for estimating the energy effect of fenestration products on typical one and two story homes.
COMFEN
COMFEN 4.0 - COMFEN is a tool designed to support the systematic evaluation of alternative fenestration systems for project-specific commercial building applications. COMFEN provides a simplified user interface that focuses attention on key variables in fenestration design. Under the hood is Energy Plus, a sophisticated analysis engine that dynamically simulates the effects of these key fenestration variables on energy consumption, peak energy demand, and thermal and visual comfort. The results from the Energy Plus simulations are presented in graphical and tabular format within the simplified user interface for comparative fenestration design cases to help users move toward optimal fenestration design choices for their project.