Add soothing steam to your bath with this KOHLER 9-kilowatt steam generator. Intended for custom applications, this generator can be located up to 25 feet from the control panel. - Stone Slab (3/4 In. -1 In. thick) ... 121-175 cubic feet - 240 V, separate circuit required - 3 to 4 minutes to initially heat - Stone (3/8 In. -1/2 In. thick) 136-195 cubic feet - Can be located up to 25 feet away from control panel