Solar supplemental heating system

Claim 1

A solar supplemental heating system for insertion between the standard stud spacing of domestic dwelling construction, comprising an integral package of a solar heat collector having a width to fill said stud spacing, said collector having an outer transparent face member having a high thermal conductivity, said collector having a rear member having a reflective surface, said collector having an inlet and outlet, a heat storage-emitter of said width located directly behind said collector and spaced therefrom in said package by insulation, said heat storage-emitter having first inlet and first outlet, said storage-emitter being about five times the volume of said collector, conduits connecting the inlet and outlet of said storage-emitter to the outlet and inlet respectively of said collector, said conduits running through said insulation at the top and bottom of said package, a radiator connected to a second inlet and a second outlet of said storage-emitter, a heat collecting fluid medium including a colloidal suspension of finely divided graphite particles in a fluid having a wide fluid temperature range, and means to circulate said medium through said collector, storage-emitter, and radiator by drawing said medium under pressure from said collector to said storage-emitter.