Abstract:
This study aimed to evaluate green building and conventional building
performance in Bangkok Metropolitan Region in terms of indoor environmental
quality (IEQ), and to estimate the cost of energy consumption in Heating, Ventilation,
and Air conditioning (HVAC) system. Objective and subjective measurements were
conducted in 3 green buildings and 1 conventional office building using indoor air
quality measuring instruments and surveys. The study found that there were
significant differences of the measurement results between green buildings. The
results in some buildings exceeded the acceptable limits, specifically PM2.5 (16.67-
40.26 μg/m3) as a consequence of outdoor air pollution and occupants behavior.
The survey results indicated that most of the office workers were satisfied with
overall IEQ aspects. Health impact data were analyzed by using odd Ratio showed
that the occupants in building with higher concentrations of the pollutants were
more likely to have health symptoms than those who were exposed to lower
levels of the pollutants. The HVAC operating cost of the conventional building was
the highest among other buildings. Improper building management and
inefficient energy saving policy can deteriorate IEQ. In conclusion, The outdoor
environment and the occupants behaviors are crucial factors affecting the
performance of green building in term of IEQ.