Poor Ventilation

Example of a poorly ventilated indoor carpark [1]

Example of a mini jet fan used to improve ventilation in an indoor carpark

Design Guidelines

• Comply with the ventilation requirements of car park spaces (above ground/basement) using fan systems as per SS 553:2016. (See also ANSI/ASHRAE/IES Standard 90.1:2013).
• Use hot smoke test/CFD fire modelling to show effectiveness of jet fans system [2]. (See also AS 1668.2).

Construction Guidelines

• Jet fan system integrated with carpark fire safety system within the same level for smoke control. Minimum headroom for installation of jet fan system is 3m [2].

Maintenance Guidelines

• Compliance of air change rate with SS 553:2016. (See also ANSI/ ASHRAE/IES Standard 90.1:2013).
• Quarterly inspection for noise, accumulation of dust and controls function [3].

References
[1] Photo taken from Davis, G. (2008) Retrieved from https://www. safety services company.com/industry-category/construction/silent-killer-alert-and-tips-carbon-monoxide-hazard-bigger-this-time-of-year/
[2] Singapore Civil Defence Force (2008). Fire safety requirements for ductless jet fans system in car parks. Singapore: SCDF.
[3] Chew, M. Y. L. (2016). Maintainability of Facilities: Green FM for Building Professionals (2nd ed.). Singapore: World Scientific.

Normative References/Standards Referred to for Ventilation
• ANSI/ASHRAE/IES Standard 90.1:2013 — Energy standard for buildings except low-rise residential buildings
• AS 1668.2-2012 — The use of ventilation and airconditioning in buildings — Mechanical ventilation in buildings
• SS 553:2016 — Code of practice for air-conditioning and mechanical ventilation in buildings