div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader039fdocumentsinreader039viewer20220221185cc574dd88c9936d678dbfb5html5page1jpg target=_blank img data-url=documentair-filter-unit-classified-by-underwriters-2000-lab-tested-by-the-air-filterhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: AIR FILTER UNIT CLASSIFIED BY UNDERWRITERS … 2000 · Lab tested by the Air Filter Testing Laboratories Inc in accordance with the American Society of Heating AIR FILTER loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader039fdocumentsinreader039viewer20220221185cc574dd88c9936d678dbfb5html5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader039fdocumentsinreader039viewer20220221185cc574dd88c9936d678dbfb5html5page2jpg target=_blank img data-url=documentair-filter-unit-classified-by-underwriters-2000-lab-tested-by-the-air-filterhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: AIR FILTER UNIT CLASSIFIED BY UNDERWRITERS … 2000 · Lab tested by the Air Filter Testing Laboratories Inc in accordance with the American Society of Heating AIR FILTER loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader039fdocumentsinreader039viewer20220221185cc574dd88c9936d678dbfb5html5thumbnails2jpg width=140 height=200 adivdiv