Why Car Park Ventilation

If the carparks are not adequately naturally ventilated then it is crucial to remove vehicle exhaust fumes containing dangerous gases that can kill by introducing mechanical ventilation.  Ventilation systems consist of exhaust and supply fans. Many car park ventilation systems are either running at full speed, are turned off, or operating on timers during perceived “peak periods”. The first approach imposes a significant energy cost and the latter two can compromise occupant health and safety.

Car Park Ventilation Installation

We intigrate CO sensors and VSD in order to reduce the energy consumption instead of operating the sytems all the times. The system must also provide at least one air change in every 24 hr period. The Building Code of Australia requires a carpark mechanical ventilation system to be installed in buildings under clause F4.11 Carparks Part 4 Light and Ventilation. The mechanical system must comply with AS 1668.2, the use of mechanical ventilation and air-conditioning in buildings – Ventilation design for indoor air containment control.

Car Park Ventilation Design & Installation

Cummins Contracting conduct the design and installation of both commercial and residential underground car park ventilation systems. All our systems are specifically designed to meet the building structure, and where possible are concealed. They are compliant with all relevant NCC and AS 1668.

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The supply and Installation of basement car park ventilation systems have been offered by Cummins Contracting for more than a decade and with the popularity of underground car parking now being included on many domestic homes as well as apartment blocks. We have taken the opportunity to turn this requirement into one of our strong points. With close to 50 different basement ventilation systems now being completed, our knowledge of both design and execution is certainly a strong point we pride ourselves on. Feel free to contact us with any questions you may have. From Mechanical Services Switchboard MSSB design, Carbon Monoxide sensors, Movement sensors, strobe light integration, fire dampers, volume control dampers, variable speed drives VSD, and all your other intricacies associated, we can certainly arrange all the above and provide the expert installation. There are a variety of car park ventilation systems that can be installed depending on the site requirement:

  • Natural Ventilation Systems
  • Mechanical Ventilation Systems using the traditional system
  • Mechanical Ventilation Systems using jet fan system
  • Mechanical Ventilation Systems using combination of traditional systems and jet fan system

Natural Ventilation is the most preferred method of ventilating car parks as it cheap and most reliable option. It requires fresh air to be circulated in the car park through available opening or weather louvre or perforated door. However, this method can be used in the basement below 10m of the ground level, hence the need for mechanical extract systems evolved.

Mechanical Ventilation Systems using the traditional system consists of MSSB, fans, back draught dampers, solid ducting, anti-vibration mounts and all other relevant applications involved in the installation and hanging equipment. The air is extracted by a series of high-level and low-level mounted ductwork completed with exhaust grilles and volume control dampers. The concentration of the CO is measured by the CO sensors situated in the car park. The CO sensors are interconnected with the Variable Speed Drive to control the fan speed and flowrate. The exhaust is then pushed through ductwork and discharged in the atmosphere.

The car park exhaust is usually scheduled to run in full speed from Monday to Friday between 7.00 am to 9.00 am and 4.00 pm to 6.00 pm. Other than these scheduled times, the car park exhaust fan varies its speed depending on CO concentration in the car park.

Jet Fan Systems are used to produce thrust or impulse to the air to assist natural ventilation. Also,  an artificial air thrust needs to produce to replace the need for ductwork. Jet fans replace ductwork and drive fumes or smoke towards extract fans, keeping pollution within acceptable levels. Jet fan systems have become increasingly popular as they overcome many of the problems associated with metal ductwork. The only difficulty with these systems the are site-dependent and computational modelling has to be done independently for every site to conduct the design and installation.

The combination of Jet Fan Systems and traditional ductwork systems also can be used to optimise the cost of the project and in the instance where no space for the ductwork to be installed. Jet fan systems are more discreet and take up considerably less room than ducted ones. Therefore, it is a perfect choice if there is space constraint. The combination of these two systems are getting popularity in the large commercial complex.

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