{HEAD ~ The first register} is connected to {TAIL ~ the ends} of the first air circuit, in the first operational position, to provide for residential used air intake at the compressor and expulsion of the turbine discharge air into the atmosphere 
is connected to
{ HEAD ~ The first register } is connected to { TAIL ~ the ends } of the first air circuit , in the first operational position , to provide for residential used air intake at the compressor and expulsion of the turbine discharge air into the atmosphere
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH