October 25, 2016
The biggest user group of RED Calc Free tools is the Department of Energy Weatherization Assistance Program (WAP) energy auditors, QC inspectors, and crews. A number of "private" groups also use the RED tools, including home performance contractors, HERS raters, code enforcement officers, HVAC analysts and installers, architects, engineers, and researchers.
In the U.S. the states where there is greatest use, in descending order are:
International use, in descending order:
- United Kingdom
- United Arab Emirates
The use of the RED Calc Free tools has continued to increase since they were first published. In the near future we will publish RED Calc Pro, an enhanced version of our Free tool set. We will change a reasonable monthly fee for the use of RED Calc Pro, but the RED Calc Free tools will continue to remain available.