b'COVERINGS PRODUCTSGranQuartzIn the quest to fi ght the ravages of respirable silica, the DuroAir Silica Dry Dust Collection System reduces worker exposure to respirablesilicainmanufacturing or fabrication facilities. The system usesanenclosurewithasliding curtain wall, and a powerful four-stage fi system to MERV 15ltration that uses negative pressure to pull particles into the fi lter. The compa-ny is working on a smaller versionThis retractable enclosure system uses negative pressure to protect workers from designed for the jobsite.respirable silica.TheVOICE of theTILECONTRACTORThe NTCA Reference Manual was developed to identify recurring chal-lenges to successful installations of tile and stone, recognize potential problems, and to gain consensus from industry experts on offering solutions. Now available for purchase in print or digital download. www.tile-assn.comNational Tile Contractors Association626 Lakeland East Drive|Jackson, MS 39232PO Box 13629|Jackson, MS 39236-3629601.939.2071|601.932.6117 fax|tile-assn.com120 TileLetter | May 2019'