No plans yet on heating water. I may Insulate garage completely and see how that temperate will effect water. However I am planning to pump about 200 gal at a time into other tank and slowly mixing it with main system not to throw off tank temperature more than 1-1.5 degrees.Have you decided how to heat the water in that holding tank yet?
excellent quest but I haven’t thought it through all the way yet
connection to this tank will go somewhere on top and just gravity drain into it from upstairs. Gonna have to be careful and not to walk away while it’s filling up... I’ve done that before but not on this scale