{HEAD ~ The thermal resistance} of the insulation is determined from the known cavity depth and {TAIL ~ insulation density} 
is determined from
{ HEAD ~ The thermal resistance } of the insulation is determined from the known cavity depth and { TAIL ~ insulation density }
HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL REL OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL