Please use this identifier to cite or link to this item: https://scholarbank.nus.edu.sg/handle/10635/223391
Title: A COMPARATIVE STUDY ON IAQ IN SPLIT AND CENTRAL AIR CONDITIONING UNITS IN OFFICE BUILDINGS
Authors: CHAN PEI LIN
Keywords: Building
Project and Facilities Management
Ooi Peng Lim Steven
2011/2012 PFM
Central air conditioning
IAQ
Indoor air quality
Office buildings
Split air conditioning
Issue Date: 3-Jan-2012
Citation: CHAN PEI LIN (2012-01-03). A COMPARATIVE STUDY ON IAQ IN SPLIT AND CENTRAL AIR CONDITIONING UNITS IN OFFICE BUILDINGS. ScholarBank@NUS Repository.
Abstract: In tropical Singapore, air conditioning system is often a necessary installation in indoor environment. Most office buildings in Singapore utilize a central air conditioning system whereas a minority of individual tenants utilized split air conditioning systems. In recent years, more studies were done on energy consumption and life cycle analysis of air conditioning systems yet few researches were conducted to analyse and compare the IAQ both air conditioning systems. This dissertation seeks to evaluate and compare the IAQ of split and central air conditioning units in office buildings and make suitable recommendations. IAQ audit for both objective and subjective measurements were conducted at two different premises, an office at Geylang East Industrial Park and Shaw Centre. Objective measurements include experiments for the various IAQ parameters and subjective measurements include checklists for offices background/environment and survey questionnaires. The experiments results indicated that the central air conditioning system provide a better IAQ as compared to the split air conditioning system due to a more controlled environment. IAQ of offices with split air conditioning were more affected by social environments and office characteristics. Survey results correlated with the IAQ results and confirmed that Sick Building Syndrome is more prevalent in offices with split air conditioning systems. This study has proved the research hypothesis that IAQ is critical to ensure high productivity and health for its occupants as poor IAQ will lead to SBS. It has also established the hypothesis that central air conditioning has better temperature control and IAQ as compared to split air conditioning. The study limitations are the lack of longitudinal data obtained from IAQ audit and limited sample size. Recommendations are also proposed to improve the IAQ of offices.
URI: https://scholarbank.nus.edu.sg/handle/10635/223391
Appears in Collections:Bachelor's Theses

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