The present invention has been being provided in the air supply duct connector and the ventilation duct connector has one surface, one side and the supply opening and the casing vent is formed on the other side, the air supply (給 氣) exposed to be respectively connected to the air supply duct and the ventilation duct by a flexible hose the air supply duct and the air supply connector to the air supply communication path that is provided to the inside of class organization, authority level to close the air supply duct and the end connections to the supply direction is arranged inside the casing for the blowing means, an exhaust vent for (排氣) an exhaust pipe disposed inside of the casing so as to communicate the duct end connections and the outlet, the exhaust blower means and rapid engine inside the exhaust of the air volume flowing through the inner air flow and an exhaust pipe of flowing air supply to which is provided on the inside of the exhaust pipe to the exhaust port and the direction close to the exhaust It relates to an airtight duct containing air flow measuring means that are each arranged inside of the exhaust pipe and the inside of the engine in order to measure class and ventilation performance test apparatus and method using the performance test duct.
According to the present invention, so that a test of the air supply duct and the ventilation duct made at the same time on one of the casing by having a class engine, exhaust pipe, air flow measurement means such as hayeotgi simplify the performance testing method is good portability, economical confidential and ventilation performance testing is possible, and it is possible to run the leak test and the air volume distribution in each of the diffuser duct system as a unit at the same time it is possible to enhance the efficient energy usage of the indoor air quality.