Kohler has a long history of engineering fixtures that feel substantial and work reliably. The Invigoration 9kW shower system (32326-NA) is a digital thermostatic valve designed for homes with higher electrical capacity. It delivers a consistent water temperature regardless of pressure changes elsewhere in the house—no sudden cold shocks when someone flushes a toilet.

The system uses a 9kW heating element to raise incoming cold water to your set temperature instantly. In practice, that means no waiting for a tank to recover and no running out of hot water during a long shower. The digital interface lets you set an exact temperature in degrees, rather than guessing with a traditional knob. The valve itself is compact and mounts neatly behind the wall, leaving only the sleek control panel exposed.

One important note: this is the control unit only. You will need to supply your own showerhead, trim kit, and rough-in valve separately. Installation requires a dedicated 240V circuit and should be handled by a licensed electrician. For households with strong water pressure and a desire for precise, endless hot water, this system removes the compromises that come with standard mixing valves.