Functions   Professional     Enterprise  
Psi-Value calculations
Frsi calculations
Calculations with more than two temperature boundary conditions  
Finite element mesh
Temperature profile
Heat flow  
Undisturbed U-values
Manual U-Value  
Boundary conditions
Temperature Scale  
DIN database
Old database
Xella database
Database Editor
Interactive Sample wizard
Construction materials catalogue
Psi-value calculation
Frsi calculation
Calculations with more than two temperature boundary conditions  
Layout Editor
Different layouts  
DXF/DWG import
Multiple thermal bridges in one drawing
Dimensions to DIN 1356
Text labels
Item texts
2D graphic elements
DIN lines
DIN hatching
Editing (warping,….)  
Online help
Manual as a PDF
Example Files DIN 4108 Supplement 2
Automatic convergence
Automatic compression
Automatic matrix calculation for DIN EN ISO 10211 Annex C  
Number of degrees of freedom 15 000 1 million


Psi Therm 2D & 3D provides the user with an accessible and easy-to-use interface to construct detailed building sections to determine heat flows & surface temperatures. The software automatically calculates psi-values & fRsi values, and generates comprehensive reports in accordance with the relevant standards & conventions for building regulations compliance. With Psi Therm, the user can improve on standard construction details, providing a significantly improved Y-factor and superior building energy rating, while eliminating mould-growth risk.


London training course taking place 14th - 16th March 2016! Don't miss out on this opportunity to learn how to carry out thermal bridge assessment in 2D & 3D, with our hands-on course. The course is aimed at professionals working in the Passive House area, however is of interest to anyone who wants to understand how to calculate thermal bridges. The course will present all the methods required by the Passive House Institute for ambient junctions as well as the ground floor connections, never before presented in English until now! To book your place click here or go to our pricing page. Click here to download the course brochure.


As competent assessors under Part L1a as well as members of the Irish National NSAI Accredited thermal modellers scheme, we can offer you support for any of your project needs. We also provide third-party certification of analyses to all Psi Therm license holders in accordance with the requirements of BR497, ISO 10211 & ISO 10077-2. For more information on this service please contact us.


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