The method 13 including providing a local enclosure in said space and containing said filter, and providing an opening through {HEAD ~ said liner} to communicate with {TAIL ~ the filter} in said enclosure 
The method 13 including providing a local enclosure in said space and containing said filter , and providing an opening through { HEAD ~ said liner } to communicate with { TAIL ~ the filter } in said enclosure
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH