Draft SS 554:2025

Code of practice for indoor air quality for air-conditioned buildings (Revision of SS 554:2016+A1:2021)

OVERVIEW

The standard applies to all enclosed air-conditioned premises except residential premises, factory production areas, hospitals, polyclinics and laboratories. It applies to all types of air- conditioning and air-distribution systems.

It also specifies indoor air quality that will be acceptable to building occupants, and to minimise the potential of adverse health effects.

The changes in this revision include:
? updating the acceptable limits of indoor air quality parameters, their measurement and analytical methods, taking reference from the latest national and international standards and available data.
? differentiating the sampling and test requirements for an indoor air quality (IAQ) audit and a quicker IAQ screening approach.
? updating minimum efficiency reporting value (MERV) filter ratings to MERV-A, to better reflect actual and long-term filter efficacy.
? introducing a new resilience mode setting out performance standards and readiness plans needed for risk mitigation during periods of heightened infectious aerosol transmission risk and poor outdoor air quality (haze mode).
? adding an informative annex on low-cost sensors to provide guidance on their use and interpretation of data.

This standard is intended to complement SS 553 ‘Code of practice for air-conditioning and mechanical ventilation in buildings.
Users of the standard includes engineers, building owners, facility managers, service providers, and relevant government agencies.

COMMENTS

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PRODUCT DETAILS

Status Draft
Edition 2025
No. of Pages 81
ICS Classification
Committee
Available for Purchase For sale in Singapore only
Adoption -