{HEAD ~ Heated air} can flow by natural convection or with blower assistance through a plenum in the solar heating wall panel to and from {TAIL ~ connected ducting} 
flow to
{ HEAD ~ Heated air } can flow by natural convection or with blower assistance through a plenum in the solar heating wall panel to and from { TAIL ~ connected ducting }
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH REL OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL