Check out Takagi, they have most recently come out with a larger unit that claims to deliver 7 gallons of 120F a minute. The technology is getting better all the time. http://www.Takagi-USA.com it seems as if this site is under construction. E-mail Marcelo Martinez at [email protected] or call 949-453-8388 for additional information.
The Local Plumber
Tustin, California http://www.TheLocalPlumber.com