div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imagea href=https:reader042fdocumentsinreader042viewer20220308135b2013777f8b9ae4208b5ba6html5page1jpg target=_blank img data-url=documentthis-is-unavoidable-every-ift-of-horizontal-flue-must-be-followed-by-3ft-of-verticalhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: this is unavoidable every Ift of horizontal flue must be followed by 3ft of vertical After installing the heater a check must be made to ensure that there are no products of combustion loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader042fdocumentsinreader042viewer20220308135b2013777f8b9ae4208b5ba6html5thumbnails1jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imagea href=https:reader042fdocumentsinreader042viewer20220308135b2013777f8b9ae4208b5ba6html5page2jpg target=_blank img data-url=documentthis-is-unavoidable-every-ift-of-horizontal-flue-must-be-followed-by-3ft-of-verticalhtmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: this is unavoidable every Ift of horizontal flue must be followed by 3ft of vertical After installing the heater a check must be made to ensure that there are no products of combustion loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader042fdocumentsinreader042viewer20220308135b2013777f8b9ae4208b5ba6html5thumbnails2jpg width=140 height=200 adivdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imagea href=https:reader042fdocumentsinreader042viewer20220308135b2013777f8b9ae4208b5ba6html5page3jpg target=_blank img data-url=documentthis-is-unavoidable-every-ift-of-horizontal-flue-must-be-followed-by-3ft-of-verticalhtmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: this is...