Aerial door - a specialized manometric leak detector designed to conduct full-scale tests of the air permeability of the building envelope, measure the air exchange rate of the building, and also to assess the tightness of individual rooms or sections of the building.
Description and principle of operation
The air door consists of three main components:
- a removable fabric or plastic door panel installed in the opening of the entrance door of the building under test, with an opening for the fan,
- calibrated measuring fan (or several fans), capable of providing air flow in the range from units to tens of thousands of cubic meters per hour,
- differential pressure gauge that measures pressure at various points both inside the building and outside it, and controls the fan in real time.
The aero door fan is installed in the opening of the entrance door or window of the building using a removable door panel. All external doors and windows are closed, all doors inside the building are opened. Turn off all types of gas equipment and other systems whose performance is sensitive to atmospheric pressure drops. Ventilation, exhaust, supply and other regular openings are sealed. Measure the atmospheric pressure inside and outside the building. Turn on the fan in the mode of forcing air into the building or in the mode of creating a vacuum - depending on the purpose of the test. Changing the fan speed and direction of air flow, perform a series of measurements of the following parameters [1] :
- the amount of air passing through the fan;
- atmospheric pressure inside the building;
- atmospheric pressure outside the building;
- atmospheric pressure on the fan motor cover.
All data obtained during the test is stored for subsequent processing and analysis.
The described method of non-destructive testing by the physical process underlying it relates to leak detection (non-destructive testing by penetrating substances), and by the primary information parameter to the gas method.
Aero door is applied:
- for measuring the air permeability of building envelopes and air exchange rates;
- to detect breathable defects;
- to assess the energy efficiency of the building;
- to check the operation of ventilation systems;
- to determine the rate of air exchange;
- to assess the tightness of cleanrooms ;
- to test the performance of gas fire extinguishing systems and active fire prevention systems .
Notes
- ↑ GOST 31167-2009. Interstate standard “Buildings and constructions. A method for determining the air permeability of building envelopes in natural conditions. "
See also
- Leak detector
- Ventilation
- Breathability
- Energy audit