THERM

THERM 6.3
For NFRC Certification and modeling complex glazing systems

THERM 7.4
For modeling vacuum glazing, deflected glass, vertical venetian blinds, cellular shades and perforated screens
Forum
For questions about THERM
Forum
For questions about THERM
Knowledge Base 
(Check here first if you are experiencing a problem with the software)
Knowledge Base 
(Check here first if you are experiencing a problem with the software)
Documentation Documentation
Tutorials Tutorials

Two-Dimensional Building Heat-Transfer Modeling

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.

THERM’s two-dimensional conduction heat-transfer analysis is based on the finite-element method, which can model the complicated geometries of building products. See Components for more details.

THERM can be used with the Berkeley Lab WINDOW program. THERM's results can be used with WINDOW's center-of-glass optical and thermal models to determine total window product U-factors and Solar Heat Gain Coefficients. These values can be used, in turn, with the RESFEN program, which calculates total annual energy requirements in typical residences throughout the United States.

Components

System Requirements

Sample Screen Shots

Click on image to view the screen shot.

Sample Cross Section
(Aluminum Slider Window Frame)
Sample Isotherm Results
(Aluminum Slider Window Frame)
Sample Color Infrared Results
(Aluminum Slider Window Frame)
Sample Curtainwall with Bolt Cross Section with Infrared Results

Updated: 10/03/15