Top 5 Thermal Modelling Software for Calculating PSI Values: A Comparison
Calculating PSI values accurately is crucial for evaluating a building’s thermal performance, especially when you’re aiming for SAP (Standard Assessment Procedure) compliance and want to hit energy efficiency targets. As the demand for precise thermal modelling grows, a variety of software solutions have been developed to help professionals accurately calculate PSI values. Let’s break down the top 5 tools you have at your disposal…
1. AutoPSI
Best for: SAP-focused thermal modelling
Overview:
AutoPSI is a specialist tool designed specifically for thermal bridging calculations within SAP assessments. It takes the hassle out of calculating custom PSI values, offering a more accurate approach than relying on outdated default values. Developed with SAP requirements in mind, it’s ideal for both new builds and retrofitting projects, ensuring every junction is accurately accounted for.
Key features:
- Bespoke PSI value calculation: Generate custom PSI values tailored to your specific project, enhancing the accuracy of your thermal assessments.
- SAP integration: Fully aligned with SAP 10.2, AutoPSI keeps you compliant with the latest standards and regulations.
- User-friendly interface: Designed for simplicity, it’s easy to use for both experienced professionals and newcomers.
- Up-to-date data: Incorporates the latest construction techniques and thermal performance data, avoiding the pitfalls of outdated defaults.
- Automated boundary, U-Value calculations: AutoPSI automates many tasks that require user input in other software products.
Advantages:
AutoPSI is the go-to tool for professionals conducting SAP assessments. Its ability to generate bespoke PSI values sets it apart from using defaults, offering a level of accuracy that default values simply can’t match in a quick, simple user interface.
2. THERM
Best for: Detailed finite element analysis
Overview:
THERM developed by the Lawrence Berkeley National Laboratory, is known for its finite element analysis (FEA) capabilities. It’s a robust tool that models heat transfer in 2D building components like walls, windows, and roof junctions. While it’s not designed specifically for SAP assessments, its detailed analysis of thermal bridging makes it a valuable tool for architects and engineers who need high-detail modelling.
Key features:
- Finite element method: Provides highly detailed thermal bridge modelling using FEA.
- Advanced heat transfer calculations: Models conduction, convection, and radiation in detail.
- CAD compatibility: Integrates with other CAD software for seamless building design workflows.
Advantages:
THERM offers unparalleled detail in thermal analysis, providing a granular look at heat transfer through building components. However, its complexity might be overwhelming if you’re looking for a straightforward, SAP-focused tool.
3. Psi-Therm
Best for: Comprehensive PSI value calculation
Overview:
PSI-Therm is designed specifically for thermal bridge calculations and integrates well with various energy assessment frameworks, including SAP. With both 2D and 3D modelling capabilities and an intuitive user interface, it caters to detailed analysis and quick PSI value calculations alike.
Key features:
- 2D and 3D modelling: Offers both types of simulations for thorough thermal bridge assessments.
- SAP integration: Tailored for professionals working within SAP frameworks and building energy regulations.
- Accurate PSI calculations: Delivers high-accuracy PSI values for easy use in SAP assessments.
Advantages:
Psi-Therm strikes a good balance between detailed analysis and ease of use. Ideal if you need precise PSI calculations without diving into overly complex simulations.
4. Flixo
Best for: Detailed thermal bridge modelling and reporting
Overview:
Flixo is a thermal bridge simulation tool that stands out for its visual representation of thermal bridges in building elements. The software focuses on precise two-dimensional heat flow simulations and it’s versatile for a range of thermal performance assessments. While it’s not limited to PSI value calculations, its detailed reporting is useful for documentation and compliance purposes.
Key features:
- Visual heat flow simulation: Detailed heat flow graphics to visualise thermal bridges.
- Accurate PSI value calculation: Provides high-precision PSI values for use in energy performance evaluations.
- Comprehensive reporting: Offers detailed, professional reports.
Advantages:
Flixo is great for those needing in-depth thermal analysis combined with powerful reporting tools. However, its complexity may not suit those looking for a more straightforward, SAP-specific solution.
5. BuildDesk U
Best for: Quick U-value and PSI value calculations
Overview:
Build Desk U is geared towards those who need quick and efficient energy assessments without diving into complex simulations. The software supports compliance with SAP and other national energy standards, making it a practical tool for fast, reliable calculations.
Key features:
- Rapid U-value and PSI value calculation: Perfect for time-sensitive projects.
- SAP compliance support: Compatible with SAP calculations and energy efficiency regulations.
- Simplified interface: User-friendly platform for straightforward assessments.
Advantages:
BuildDesk U is your go-to for fast, reliable calculations. However, it doesn’t offer the level of detailed analysis or extensive modelling found in more advanced tools.
The bottom line?
For professionals focused on SAP assessments, AutoPSI is the top choice for accurate PSI value calculations. Its seamless SAP integration, user-friendly design, and custom PSI value capabilities make it the most effective tool for reducing reliance on default values. While tools like THERM and Flixo offer more detailed analysis, AutoPSI’s balance of simplicity and precision is unmatched for those looking to enhance their SAP thermal modelling efforts.
If you’re aiming for precise thermal modelling that aligns with SAP 10.2 requirements, AutoPSI is the software you need. Try it out with a free demo.
