Building Energy Software Tools
Formerly hosted by US Dept. of Energy    

THERM

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THERM is a state-of-the-art computer program developed at Lawrence Berkeley National Laboratory (LBNL) for use by building component manufacturers, engineers, educators, students, architects, and others interested in heat transfer. Using THERM, you can model two-dimensional heat-transfer effects in building components such as windows, walls, foundations, roofs, and doors; appliances; and other products where thermal bridges are of concern. THERM's heat-transfer analysis allows you to evaluate a product’s energy efficiency and local temperature patterns, which may relate directly to problems with condensation, moisture damage, and structural integrity.

Expertise Required: 

Engineering knowledge of building components and some heat transfer expertise is useful.

Audience: 

Engineers, building energy consultants, architects

Input: 

Detailed drawing of a cross section of the building element being modeled. DXF files can be imported as underlays and traced, although it is also possible to draw the model completely in THERM, including working from a dimensioned drawing.

Output: 

Component U-factor results, as well as images showing temperature isotherms, and "IR" results.

Strengths: 

Good for modeling thermal bridging in building components. Used by the National Fenestration Rating Council for calculation frame U-factors in their rating system.

Country: 
United States
Major Capabilities: 
Other
Building Type: 
Subsystem Level
Language: 
English
Platform: 
Windows
Pricing: 
Free
Help and Support: 
Free Email Support
Last Software Update: 
08 October 2015
Last Entry Update: 
20 September 2018
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