Amerec AK7.5 Steam Shower Generator – 7.5 kW (100–200 cu ft)Amerec AK7. 5 Steam Shower Generator 7. 5 kW (100200 cu ft) The Amerec AK7. 5 Steam Generator is built for larger residential and light commercial steam showers that require powerful, consistent steam output. With a 7. 5 kW heating capacity, the AK7. 5 is ideal for steam rooms sized between 100 and 200 cubic feet. As part of the trusted Amerec AK Series, the AK7. 5 combines fast steam production, long term durability, and flexible electrical options