On board, on guard, 24 hours a day, the safest way to combat an engine room fire. Choosing your system: determine the volume of your engine compartment in cubic feet, L x W x H. Do NOT deduct for engines, fixed tanks, or other equipment. Diesel powered craft must also install the automatic engine shutdown system. Total flooding systemAutomatic discharge at 175°F (79°C)MA Series offers optional manual release cable (sold separately - see MA2 discharge cable kits)Each system includes a powder coated steel bottom shelf bracket mount with stainless steel screw clamps, and a 2" round system status indicator light.No water or powdery residue3-Year Limited Warranty and is USCG, Factory Mutual, and Bureau Veritas ApprovedUses HFC-227ea non residue fire suppression agents (Heptafluoropropane) which is approved for occupied spaces and is approved for use worldwide. Effective Halon replacement clean agent.