Professional Heat Loss Calculator

The Barlo professional heat loss software programme greatly simplifies heatloss calculations by prompting you to simply enter the room sizes, wall and ceiling constructions and target room temperatures. Easy to operate and intuitive to those with an elementary familiarity of Windows software, the calculator is free and can be quickly downloaded and kept on your PC as an invaluable design aid, saving time and money.

On-line help information is provided with the software, or you can click here to request a user manual.

Download Setup Files in .ZIP format

PC Instructions
1. Open the downloaded zip file
2. Unzip the file '' to a floppy disk.
3. From the Start Menu, select Run.
4. Type "a:\setup" and press ENTER.
5. Follow the on-screen instructions to install the Heatloss Software.

NB : This software is for PC only and requires Microsoft Windows 3.1 or higher.
You will need an appropriate zip program, such as WinZip, installed to view this software.
If you do not have an appropriate zip program please visit to download a copy and for instructions on how to use it.


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