Hydronic heating with satellite distribution stations for multi-temperature supply water to heating loops

Claim 1

A hydronic heating system having a source of hot supply water and a reservoir of cooler return water, a supply water line from said source, a return water line to said reservoir and a multitude of heating loops through which water flows from said supply line to said return line, comprising, (a) a main distribution station including a main supply header fed supply water by said supply line and feeding supply water to main heating loops, a main return header fed return water from said main heating loops and feeding return water to said water return line and a main pump that compels water flow from said main supply header, through said main loops to said main return header, (b) whereby said main distribution station heating loops are fed water at the temperature T, (c) a satellite distribution station including a satellite supply header feeding satellite supply water to satellite heating loops, a satellite return header fed return water from said satellite loops and a satellite pump that compels water flow from said satellite supply header, through said satellite loops to said satellite return header, (d) a satellite injection water line from said main supply header to said satellite return header, (e) a satellite return water line from said satellite supply header to said main return header, (f) whereby there is a water exchange between said main distribution station and said satellite distribution station that results in a net heat flow from said main distribution station to said satellite distribution station and said satellite station heating loops are fed water at a temperature lower than said temperature T and (g) means responsive to outside ambient temperature is provided for controlling said water exchange.