#smokeUnmoderated tagAll postsExplore CommunitiesTrending CommunitiesNewcomers' CommunitySteemit FeedbackSteemitCryptoAcademyআমার বাংলা ব্লগKorea • 한국 • KR • KOSteem POD TeamSTEEM CN/中文AVLE 일상Tron Fan ClubBeauty of CreativityWORLD OF XPILARSteem Alliance#smokeTrendingHotNewPayoutsMuteddudlaspov (25)in #smoke • 6 days agosmoke extraction fansWe had to design a ventilation system for a large underground garage recently, and safety in case of fire was a top…