Air volume test - air exchange rate, air leakage rate, new air volume

Air volume test

Verify the system's air supply and exhaust capacity to ensure balanced air flow in each area

A professional team operates according to standards, imports precision instruments to ensure accurate data, and provides detailed reports and optimization suggestions

The system runs more efficiently, avoiding“Big horse pulling small car”Or the problem of insufficient air volume

Pipeline air leakage test

Reduce energy loss, ensure system functionality, and avoid pressure imbalance

Accurately locate the leakage point, adopt advanced sealing repair technology, and detect efficiently and accurately

Reduce energy consumption costs and ensure that special places such as clean rooms meet functional standards

Fresh air test

Ensure personnel health, control indoor pollutants, and verify system performance

Adopting advanced tracer gas testing technology, our experienced team provides comprehensive solutions

Indoor air is healthier, effectively dilutes pollutants, and meets relevant standards

Air volume test

1. Pitot tube method: By measuring dynamic pressure and combining it with Bernoulli's equation to calculate wind speed, the airflow is obtained by multiplying the cross-sectional area. It is suitable for circular shapes/Rectangular duct straight section;2. Hot wire anemometer method: using the resistance change of the hot wire sensor to convert wind speed, suitable for air vents and short straight pipe sections;3. Airflow hood method: using a hood to seal the air outlet and directly read the airflow, suitable for supply and return air outlets

According to the "Code for Acceptance of Construction Quality of Ventilation and Air Conditioning Engineering"（GB 50243）The deviation between the test results and the design values should be≤10%

The test section is selected in the stable airflow section, and the average is taken from multiple measurements. The instrument needs to be calibrated and qualified

Pipeline air leakage test

1. Pressure attenuation method: Inflate both ends of the closed air duct to the design pressure, record the pressure attenuation time to calculate the air leakage rate, suitable for small and medium-sized air ducts;2. Flow measurement method: Maintain stable pressure inside the air duct, measure supplementary air flow through a flow meter, suitable for large-sized air ducts or high-pressure systems

according toGB 50243Divide limits according to system pressure levels, such as low-pressure systems（P≤500 Pa）Allowable air leakage≤0.1056P ⁰・⁶⁵ m³/(h・m²)

Seal all openings before testing, slowly increase the pressure, and if the air leakage exceeds the standard, it needs to be repaired and retested

Fresh air test

1. Wind speed method at the air outlet: measure the average wind speed at the air outlet multiplied by the effective area to obtain the total fresh air volume;2. Tracer gas method: By measuring the concentration changes of tracer gas, the new air volume is calculated with high accuracy;3. Duct air volume method: Measure the air volume in the straight section of the fresh air duct and deduct the air leakage rate

According to the Indoor Air Quality Standards, the indoor fresh air volume of residential and office buildings should be≥30 m³/hPeople, deviation between test results and design values≤10%

Close doors and windows during testing, ensure even distribution of tracer gas, and repair cross contamination before testing