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