Will smoke set off my fire sprinkler system? No, never 75% Not sure 25% Get Free Quotes Today! Question: Will smoke set off my fire sprinkler system? Top Answer (75% of 4 votes): No, never. Answer: No, never Explanation: Sprinkler alarm systems are activated by heat. Sonitrol of Ft. Lauderdale Answer: No, never Explanation: Fire sprinklers are typically activated by a drastic increase in temperature. MJ Services Get Free Quotes Today! Find Local Pros Free Residential Fire Sprinkler Installation Cost Estimates Related Questions How much does it cost to install fire sprinklers in a house? If one fire sprinkler head is activated, will they all go off? How are fire sprinklers activated? What is your opinion of the American Fire Sprinkler Association (AFSA)?Top answer: Favorable How Much Does It Cost to Install a Fire Sprinkler System?