Your sizing tool seems to only supply "Adjusted Cubic Feet"....Thermasol says they size just by multiplying length x width x height = cubic feet.  It would be nice to see two sizing tools on your site.  Having just the one is confusing if you interested in purchasing Thermasol.

If you are interested in only Thermasol you can still use the sizing tool to get a general idea of what generator you need. Once you choose that Thermasol generator suggested you will see a note:
NOTE: Generators are listed in accordance with our industry-leading sizing formula and are backed by our Performance Guarantee. Click here for ThermaSol’s sizing guidelines.
That link will take you to Thermasols sizing guidelines. In most cases the two will not be far off.

Thermasol believes in cublic feet, not adjusted cubic feet.  Although they say for steam rooms over 8 feet, go up to the next size.
Steam generators have been sized as Adjusted Cubic Feet for decades.
In some cases with Thermasol sizing, you end up with a unit that is too large for your steam room as they believe in up sizing.
Use both calculations and take into account your bathing preferences when choosing.

If you have us size it for you, we guarantee it's performance.
We are the only company that offers this guarantee as we are all about the bather and giving the bather the best experience that fits their desires.