Heat Load Pro 2.0 estimates the heating load of residential and light commercial buildings. Each room of a building can be defined and configured. All room loads as well as the total heating load of building are updated and displayed whenever any input is changed. Users can configure construction assemblies for walls, ceilings, floors, windows and doors based on extensive selections for building materials. The R-value of each construction assembly is determined and automatically passed into the calculations. Users can also choose to enter their own R-values for any of these assemblies.

The software also provides tools for calculating areas of simple as well as complex shapes based on minimal dimensions. All numerical inputs are range-checked when entered. Invalid inputs are instantly identified and corrected to the nearest valid value. The percentage of total heat load that occurs at all building envelope surfaces, as well as by air leakage is displayed allowing users to quickly identify potential areas for improvement and overall heating load reduction. Heat Load Pro also estimates the total seasonal heating cost of the building based on the current load, building location, type of heating energy used, and the efficiency of the heat source. Heat Load Pro is sold as a perpetual software license. Requires MS Windows 7 or higher.