The embodiment of the apparatus or method that uses {HEAD ~ the air cup} relies on the natural resistance to {TAIL ~ flow} of the loose fill insulation to create a pressure drop 
The embodiment of the apparatus or method that uses { HEAD ~ the air cup } relies on the natural resistance to { TAIL ~ flow } of the loose fill insulation to create a pressure drop
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH