Column Column A Ld a. Sprinklerhead b. Compressor 2 Deadbolt a is an essential component of the fire. hydrant system, it helps maintain the required pressure in the hydrant and the sprinkler system is a safety feature in a guest room door used at the night is the lettronic devise that senses a sudden rise in temperature or Fre in a guest room and triggers a pressurized spray of water is a mandatory requirement and is fixed on the inside of a guest room door _this motorized valve controls the flow of Hot or cold water in to the Air-conditioning coils of the HVAC system. d hydranit pump, Condenser, Smoke detector e Max room tariff display 4 e C Actuator