I bought a Thermar super power pack (9kw, model HP9024s) back in 1986 but never installed it. I'm considering installing it in a rental unit. The water heater would only serve 1 clothes washer--nothing else connected to the line. Would you recommend this, or should I just spend the $ and purchase a standard water heater? I have the instructions, etc. but see nothing about the capacity. I remember seeing it in Popular Mechanics back in 1986. Any advice you have would be appreciated.