maple1 said:Well in that case, I'm more curious as to why they rule out running one at a time in a dual install.
There is no issue with running them one at a time as far as the Garns themselves are concerned. It is possible however that the person(s) making that recommendation were thinking of pumping issues and flow available in the piping due to the altitude that pair are located. Air pressure at 10,000 feet is less than the altitude most of us live at and that introduces the factor of suction boiling and cavitation at a reduced water temperatures. When piping up an open or semi open system such as the Garn little things like that can make/break an installation.