The control system element 3 further comprising a timer element for adjusting at least one of {HEAD ~ said adjustable speed and airflow parameters} of {TAIL ~ said motor} after a preprogrammed period of time 
of
The control system element 3 further comprising a timer element for adjusting at least one of { HEAD ~ said adjustable speed and airflow parameters } of { TAIL ~ said motor } after a preprogrammed period of time
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 OTH OTH OTH OTH OTH OTH