Karl, I have a SEISCO Model RA-22 (22 KW, 75,000 BTU, 4 chambers) which is my backup to a solar DHW system using 16 Sunda evacuated tubes and 80 gallon storage tank. I turn off the backup in mid April and turn it back on in October. The on demand takes two 240 volt circuits rated at 50 amps each so it is a hog when it runs but I have been happy with it.
Lee On Mon, Feb 9, 2009 at 6:54 PM, Kurt Albershardt <[email protected]> wrote: > On 2/9/09 12:24 PM, Karl Schwingel wrote: > >> Have any of you experience with on demand electric water heaters? >> > At the recommendation of someone on this list a few years back, we > purchased a Stiebel-Eltron Tempra 36 for a project. It seems quite happy > with preheated water and is nicely engineered. > > -- > Lee Bristol > NABCEP Certified Solar Designer/Installer > > Chief Technology Officer > Standard Solar, Inc. > 202 Perry Parkway, #7 > Gaithersburg, MD 20877 > (301) 944-5105 > (240) 479-1510 (c) > www.standardsolar.com >
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