The decoration wants to remove the original ceiling of the office. Does the sprinkler need to be replaced?

First of all, you are right. If the ceiling is removed, your nozzle must be changed to spray upwards, and the smoke sensor must be adjusted to the ceiling. It costs money to change this nozzle;

Second, "Do we have to change?" This question is not easy to answer, anyway, the specification does not allow it; The local fire department does not allow it; I'm afraid the property won't let you, and your neighbors won't let you know; From the point of view of practical safety, this is also not allowed. If you can handle all the above factors, there is no problem. You can't change them.

Third, if it is a formal procedure, before the fire protection system is changed, the modification scheme issued by the unit with design data must be reported to the fire protection department for approval, and you can only modify it after approval.