What height are the Fixed heads mounted? Technical Support February 23, 2019 07:48 1.4m - 1.5m (to the middle of the nozzles) Related articles What height are the Smartscan Hydra heads mounted? What is the installation process like? Will it cause disruption? What is the specification of the wireless Hydra alarm? What is the maximum ceiling heights that the Automist system can operate? What do I do if the Apollo wireless alarm is beeping and flashing? Comments 0 comments Please sign in to leave a comment.