A heating or cooling element is disposed within the housing proximate {TAIL ~ the cavity} to heat or cool {HEAD ~ the cavity} 
A heating or cooling element is disposed within the housing proximate { TAIL ~ the cavity } to heat or cool { HEAD ~ the cavity }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD