I need to ask you some questions to determine if there is a problem with the flow of fluid through the collector panels.  Click on the words below the figure that best describes the mounting configuration of the heat collection panels.  Click on the figure for a larger image presentation.

Parallel reverse return panels in parallel with an air vent	Parallel reverse return panels in series with an air vent	Serpentine panels in parallel
Feed and return on the same end of the array, no air vent	Individual feeds, individual returns with air vents	Individual feeds, common return header with an air vent
Individual feeds, common return header with an air vent	Individual feeds, individual returns with air vents	Individual feeds, individual returns, no air vents
Individual feeds, individual returns with air vents	Individual feeds, common return header with an air vent	One feed, one return, one air vent