In {TAIL ~ the second operational position}, the first register provides for atmospheric fresh air intake at the compressor and supplies {HEAD ~ the residence} with the turbine discharge air 
In { TAIL ~ the second operational position } , the first register provides for atmospheric fresh air intake at the compressor and supplies { HEAD ~ the residence } with the turbine discharge air
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH