Download of RHVAC 9.1.0.236 was on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the program is Elite Software Development, Inc.
You can launch this PC program on Windows XP/Vista/7/8/10/11 32-bit. The program lies within Office Tools, more precisely Calculators.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. The most popular versions among the program users are 9.1, 8.1 and 6.8. Rhvac9.exe, RHVAC.exe, Rhvac8.exe and Rhvacw.exe are the most common filenames for this program's installer.
From the developer:
Rhvac makes HVAC load calculations, duct sizing, equipment selection, and sales proposals as easy as they can be - with one-click help on virtually every input, favorite material lists, automatic error checking. Calculates peak heating and cooling loads in accordance with ACCA Manual J Eighth Edition and much more.
You may want to check out more software, such as ESBCalc, ESBUnitConv or Math Mechanixs, which might be similar to RHVAC.