Tightness test should preferably be made during installation. Testing consists of the following steps:
Appropriate channel area to be tested is determined. This determination is made by taking into consideration the sealing range and pressure to be applied. For example, testing to be done at a pressure P and the selected seal 800 class B is (European standard) 100 mm. size of at most 193 m2 channel can be tested by using the pipe. If 50 mm. If the measuring tube is used to test the channel area of 65 m2 each. all openings such as vent openings of all outlets in the section to be tested channel hermetically sealed me. This closure should be done very carefully. Otherwise it reached the wrong conclusion. The tester is connected to the proper channel system. Fan runs and fan speed to the specified value in the channel system pressure (800 Pa in the example) until you reach the speed is increased. 3-5 minutes the fan is provided, and would be expected to work in a stable state of all measured values. In this case connected to the measuring tube manometer is read. pressure reading on the pressure gauge, measuring pipe with the help of the calibration curve is converted to flow. Thus fed to the duct system (or absorbed) will be found in the air flow. It corresponds to the leak test with air flow in the channel made. This flow rate divided by the canal area, air leakage is determined per m2.