SYA-46A On-site Comprehensive Testing System for Exhaust Duct Systems (including airtightness testing, ventilation performance testing, and wind cap wind‑blocking performance testing)
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Description
Product Introduction:
1. This product is used to test the on-site ventilation performance, airtightness, and wind‑proofing effectiveness of roof vents in exhaust duct systems, including exhaust volume, static pressure, and backflow prevention.
2. Air-tightness: Equipped with a high‑capacity fan, it ensures the air tightness of exhaust ducts on high floors, meeting the standard requirement of 300 Pa pressure.
3. Equip the system with blowers and test ducts according to the number of startup levels, with wireless data transmission implemented at each level.
4. Stepless-speed-control fans, capable of adapting to various operating conditions.
5. A Pitot tube combined with a micro-manometer is used to measure wind pressure, ensuring measurement accuracy.
6. Reports can be generated, making testing convenient and efficient.
Technical Specifications:
| Parameter Category | Parameter content |
| Ambient Atmospheric Pressure Sensor | Range: 0–1200 hPa, accuracy: ±1 hPa |
| Ambient temperature sensor | -40 ~ 50℃, accuracy ±0.5℃ |
| Wind speed sensor | Measurement range: 0 m/s to 10 m/s; accuracy: ±0.1 m/s |
| Barometric pressure sensor | Measurement range: ±500 Pa; accuracy: ±1.0 Pa |
| Pitot tube | L-shaped, pitot tube coefficient K = 1.0 |
| Fan airflow volume | 3000 m³/h |
| Airflow test range | 0-1400 m³/h |
| Test takeover diameter | 110mm, 160mm |
| Power supply | 220V, 1.1kW |
Test procedure:
- Airtightness
1. The on-site airtightness test of the exhaust duct system shall be conducted after the exhaust duct has been installed and prior to the installation of the hood and valves.
2. Prior to testing, seal all floor-level air inlets and the roof‑mounted vent hood base outlets; no air leakage shall be permitted.
3. Connect the duct leakage tester to any inlet of the exhaust duct under test using a flexible hose, and then connect it to the control box and the computer to power it on.
4. Measure and record the ambient atmospheric pressure and ambient temperature.
5. Click the “Exhaust Duct On-site Air-tightness Test” software icon on the desktop to launch the testing application.
6. Click “Enter System”
7. Click “Flow‑Method Air Tightness Test” to enter the “Test Interface.”
8. Select “Data Settings,” complete the key settings—“Test ID,” “Area,” and “Working Pressure”—then return to the “Test Interface” and click the “Start Test” button. The device will automatically pressurize and collect data.
10. After the test completes automatically, click “Test Record” and use the left and right arrows to locate the test data.
11. Click “Generate Excel Report and Print.” In the dialog box that appears, select the “Test Report Template” file, then click the “Open” button to generate the report.
12. After generating the report, be sure to save the file as a new copy to avoid damaging the template.
(2) Wind-avoidance property
- Prior to testing, all exhaust equipment on the ventilation system shall be shut down, bringing the system into a natural exhaust state. Environmental parameters shall be measured, and ambient temperature, atmospheric pressure, and wind speed shall be recorded. The test shall comply with the following requirements:
- Measure the ambient temperature, atmospheric pressure, and wind speed at a location 1 m from the exhaust duct and 2 m above the floor indoors; measure these parameters at a point 1 m below the rooftop wind cap and at the same elevation as the wind cap outdoors.
- Measure the static pressure and air velocity within the top-level and the next lower-level exhaust ducts of the exhaust system, and assess the wind‑blocking performance of the rooftop vent cap in accordance with the following provisions:
When the outdoor ambient temperature is less than or equal to the indoor temperature, the static pressure within the exhaust duct system is negative, indicating that the wind cap can prevent backflow of outdoor wind and that its wind‑blocking performance is satisfactory.
When the outdoor ambient temperature exceeds the indoor temperature, if the static pressure within the exhaust duct system is not greater than zero, the wind cap is deemed capable of preventing backflow of outdoor wind, and its wind‑blocking performance is considered satisfactory.
- Click “Roof Ventilation Hood Wind-Resistant Performance Test” on the desktop to enter the main interface.
5. Click “Enter System”
6. Click “Roof Ventilation Hood Wind-Resistant Performance Test” to enter the test interface.
6. Click “Data Settings” and fill in the relevant information.
7. Return to the “Test Interface,” click “Start Test,” then, according to the corresponding test location, “Record Data.” After completing the recording, click “Test Records.”
8. Click the left and right arrows to select the desired data, then choose “Generate Excel Report and Print” to export the data in a single file and save it separately.
(3) Ventilation Performance Test Procedure
- During on-site testing of the exhaust duct system, test fans should be evenly distributed in accordance with the specified test conditions. For on-site testing of the exhaust duct system, the installation of test instruments and the layout of measurement points are shown in the figure below.
- Test fans and instruments required for on-site exhaust duct system testing. The placement of measurement points for static pressure in exhaust branch ducts and in the exhaust ductwork shall comply with the following provisions: one static pressure measurement point and one air velocity measurement point shall be installed for each exhaust branch duct; for each floor, the static pressure measurement section of the exhaust ductwork shall be located at the lower center of the corresponding floor’s exhaust branch duct, with the pressure measurement point positioned at the center of that measurement section, 300 mm downstream from the branch duct inlet. In accordance with operating conditions, the appropriate test fan shall be activated and installed.
- Record experimental data.
Software Operation
1. Click the “Exhaust Duct Ventilation Performance Testing System” icon on the desktop to enter the “Test Interface.”
2. First, click the “Data Settings” tab to configure the relevant parameters. After completing the settings, click “OK” and then return to the “Test Interface.”
3. Click “Sensor” in the upper-left corner and, based on the measurement location, enter the branch‑pipe diameter (in meters): 0.16 for kitchen exhaust ducts and 0.11 for bathroom exhaust ducts.
4. Based on the installation and inspection location of the air duct, select and fill in the location point, startup floor, and current floor.
5. Measure the wind speed at each measurement point, taking three readings at different locations—0.1r, 0.3r, and 0.6r from the outer wall of the cross-section (see figure below).
6. After adjusting the anemometer’s position three times according to the pipe diameter, click “Save to Position 1 Wind Speed,” “Save to Position 2 Wind Speed,” and “Save to Position 3 Wind Speed,” respectively.
7. Click “Acquire”; the software will automatically calculate and record the results based on the measured values and the standard formula:
Q = 3600 vF
In the equation:
Q—exhaust air volume, m³/s 3 /h;
v—average air velocity in the exhaust branch duct, m/s;
F—Cross-sectional area of the exhaust branch duct, m² 2。
8. After the test is completed, click on the “Data Acquisition” screen and use the left and right arrows to select the desired records.
9. Click the “Export” button to export the raw data records.
Device Configuration
| Serial number | Name | Specification and Model | Quantity | Note |
| 1 | Air-tightness blower | 1.1 kW 3000 m³/h | 1 set | With a custom-made interface |
| 2 | Hose | 160mm | 1 set | Includes hose clamps and connectors |
| 3 | Ventilation performance fan | 300w 200m3/h | 1 unit | |
| 4 | Hose | 160mm/110mm | According to the number of startup layers | Pipe clamp |
| 5 | PVC pipe | 160mm/110mm | According to the number of startup layers | |
| 6 | Bracket | 1.5-3.5m | According to the number of startup layers | |
| 7 | Pressure sensor | ±500 Pa | 1 set | |
| 8 | PVC pipe | 160mm | 1 piece | |
| 9 | Telescopic bracket | 1. 5–3.5 m | 1 piece | |
| 10 | Pipeline anemometer | 0-10m/s | 1 piece | |
| 11 | Triangular bracket | 1–2 meters | 1 piece | |
| 12 | Environmental anemometer | 0-30m/s | 1 piece | |
| 13 | Atmospheric pressure sensor | 0-120hpa | 1 piece | |
| 14 | Ambient temperature sensor | -40~50℃ | 1 piece | |
| 15 | Host case | 1 set | Homemade | |
| 16 | Wireless Acquisition Control Box | 1 set | Homemade | |
| 17 | Pitot tube | 1 set | Air distribution pipe | |
| 18 | Laptop | 1 unit | ||
| 19 | Foam double-sided tape | Volume 2 |
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