The rear side insulation can advantageously be provided by an inflatable plastic member structurally similar to that provided on {HEAD ~ the upper or solar exposed side} of {TAIL ~ the panel} 
of
The rear side insulation can advantageously be provided by an inflatable plastic member structurally similar to that provided on { HEAD ~ the upper or solar exposed side } of { TAIL ~ the panel }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL