How much clearance should be left around the Smartscan Hydra Head? Technical Support February 24, 2019 08:18 Related articles How much clearance should be left around the Smartscan sprayhead? What is the maximum ceiling heights that the Automist system can operate? What did Smartscan Hydra's BS8458 fire performance testing entail? Can I organise a CPD? What height are the Smartscan Hydra heads mounted? Comments 0 comments Please sign in to leave a comment.