In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
I live in central California, outside design temperature is 32 degrees, using a mod-con boiler suppling the heat for a in-floor radiant heating system (26,000btu on demand load) and a 80gal DHW indirect tank. The tank is a Boderus with two heat exchangers. One hx is for the boiler the other is for two 3x8 solar panels. I would like to supplement the radiant heating by use of stored solar water, but I am not sure what equipment and controls I would need and how cost efficient it would be. If any one has any suggestions they would be greatly appreciated.