Will Vape Smoke Set Off Sprinklers Can Vapor Set Off a Smoke Alarm? What to Know Most people think fire sprinklers just sit at the ceiling. But in spaces like acoustic testing rooms, this doesn't work. That's where Retractable Sprinkler Systems come in. They extend below obstructions only Vape detector or sprinkler system, please help. : r Vaping Do Sprinklers Detect Smoke? Fire Sprinkler FAQs