Thank you! Tho I am a little confused as to why the tile factors into the calculations for acf.

Please explain, if only for my edification. It would seem to me that the internal space is fixed and tile, which in this case is impermeable would not matter. Does steam absorb into tile?

I could see the grout, which even when sealed is relatively porous, but tile? I realize that tile does absorb heat, but that should not matter with regard to overall volume. It's not like we are creating a hyperbaric chamber here. The dimensions I gave are the
inside dimensions from tiled wall to tiled wall and tiled floor to tiled ceiling. If anything, you would have to remove the tile to get to the base chamber volume of 90 acf. Sorry, for being picky, funding is a concern and we don't want to purchase any more than we absolutely have to so please, explain the calculations/reasons to me. Thank you for your time!
