div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentchimney-caps-are-so-effective-in-reducing-wind-related-downdraft-problems-the-vacu-stackhtmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: €¦ · chimney caps are so effective in reducing wind-related downdraft problems The Vacu-Stack@ chimney caps ability to prevent wind-induced downdraft -- and the resulting infiltration loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader035fdocumentsnetreader035viewer20220625065f01eb847e708231d401afa6html5thumbnails1jpg width=140 height=200 divdiv