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Additional Modeling Tools

The following modeling tools are valuable resources to support Certified Passive House Consultants (CPHC®) and other passive building practitioners with the accurate modeling of PHIUS+ projects.

BEopt™ (Building Energy Optimization)

The BEopt™ (Building Energy Optimization) software, developed by the National Renewable Energy Laboratory (NREL), is a tool for evaluating residential building energy and cost optimization. BEopt can be used to analyze new construction and retrofits, as well as single-family and multifamily buildings. BEopt runs on Energy Plus, the Department of Energy's flagship simulation engine.


THERM is a state-of-the-art computer program developed at Lawrence Berkeley National Laboratory (LBNL) used to model two-dimensional heat-transfer effects in building components where thermal bridges are of concern such as windows, walls, foundations, roofs, and doors. See PHIUS' THERM Introduction for CPHC CEUs and the THERM training package.

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