It is strongly recommended that records be kept of each test to allow for reporting or compliance needs. The following information is likely to be useful when keeping records:
- Tester ID number
- Test date/time
- Test location (i.e. address)
- Weather conditions on site
- Notable site conditions and building information
- Sealing protocol followed
The Pulse controller can record this information, but you may choose to make additional records as deemed appropriate.
When launching a test, first ensure the air receivers are charged to sufficiently high pressure by observation of
the on-screen tank pressure feeds, or by observation of the mechanical tank pressure gauge in the top of the air receiver.
Follow the Run Test user flow to enter the required building information into the software and launch a test.
Advise occupants that the test is about to start and that there will be some noise and a gush of air. Ask that
movement to be kept to a minimum during the test, which will take a total of 15 seconds for a 3-step test.
Upon pressing the button to launch the test, a 5-second countdown commences, during which the operator
should step away from the unit as well.
The Pulse test cycle itself then commences, with three main phases for a standard 2-step test:
- 2-second background pressure sampling – during which there is no air released, the device takes air pressure readings.
- 1.5-second release of air, during which time a noise and draught will be felt.
- A further 1.5-second background pressure sampling – during which time the system records external and internal air pressure.
- A second 1.5-second release of air, this time at a lesser velocity than the previous.
- A final 2.5-second period of background pressure sampling. Again, no air is released, but important background pressure readings are being taken.
For a three-step test, an additional release of air and a 1.5-second background pressure sampling phase will be observed.
The test is complete, and the results will now be presented to you on the screen.
Both yourself and the occupants should refrain from moving around during the test procedure.
This is because the highly accurate air pressure readings are taken throughout the test process, which can be disturbed by any movement of people, animals or objects within the test enclosure.
Flowchart of test cycle
Result metrics
| Name | Unit | Description |
|---|
| Air leakage rate (Q) | m³/h | Total airflow across the building envelope expressed per cubic metre of air per hour. |
| Air permeability (AP) | m³/h.m² | The leakage per hour of air from a space per square metre of building envelope. |
| Air changes per hour (N) | 1/h | The leakage per hour of air from a space per cubic metre of building volume. |
| Effective leakage area | m² | An estimate of the measured total air leakage area in square metres. |
| Achieved pressure range | Pa | The maximum and minimum pressure in Pascals that the building maintained during the test. |
| Coefficient of determination (R²) | - | The accuracy with which a curve-fitting equation can be applied to a set of results. Value must be greater than 0.96 for a valid result. |
| Air flow exponent (n) | - | Describes the airflow regime through the gaps and holes in the building fabric. Value must be between 0.5 and 1.0 for a valid result. |
