Legislation

Building Code of Australia (BCA)

AS 1668.2-2002 – The use of ventilation and air conditioning in buildings Ventilation design for indoor air contaminant control. Section 7 – Ventilation of enclosures used by vehicles with combustion engines. This section applies to all enclosures in which vehicles powered by combustion engines are parked, serviced or operated, e.g. car parks, automotive service and repair shops, enclosed driveways, loading docks and the like.

Standard relevance to:

Car parks: Section 7 Clause 7.3; 7.5; 7.7 to 7.14

Enclosures other than car parks: Section 7 Clause 7.6 to 7.12

Enclosures within car parks Clause 7.2.3

Monitoring systems in accordance with AS1668.2-2012, Clause 4.11 (Ventilation Control) and Clause 4.12 (Monitoring of Atmospheric Contaminants)

AS3666.2-2002 – Air-handling and water systems of building – Microbial control – Operation and maintenance

How AASQ can help

1. Perform on-site system evaluation of compliance accordance to the Australian Standards
2. Provide a detailed report of current system status and recommendations and remedies if required
3. Design, supply and install mechanical ventilation by means of supply air, exhaust air or a combination of supply and exhaust air
4. Design, supply and install mechanical ventilation in corporation with the existing natural ventilation.
5. Perform periodic equipment checks and Calibration in accordance Section 7.2.2

Systems designed in accordance with this Standard are based on a 9 ppm ambient CO level and a 51 ppm rise in CO for non-occupied car parks or on a 3 ppm 8 h average ambient CO level and a 27 ppm rise in CO for attendant parking or other occupied situations.

This Section assumes an ambient CO level of 9 ppm. Where data from the relevant EPA or from site monitoring indicates a consistently lower ambient value, then that value may be used in calculations.

For enclosures for which a combination of natural ventilation and mechanical ventilation is used, the effective mechanical airflow rate is the lesser of the supply airflow rate and the exhaust airflow rate, as excess make-up air drawn from naturally ventilated areas may be fully loaded with contaminants, and excess supply air may reduce the effectiveness of the natural ventilation openings. Typical car park ventilation layouts are given in AS 1668.2 Supp 1.

6. Perform periodic maintenance in accordance with AS1668.2-2012, Clause 4.11 (Ventilation Control) and Clause 4.12 (Monitoring of Atmospheric Contaminants)

AS3666.2-2002 – Air-handling and water systems of building – Microbial control – Operation and maintenance