a b s t r a c t
The government of Thailand legislated an Energy Conservation Promotion Act (ECP Act) in 1992 and set
bye-laws that identify designated buildings (DBs) and detail mandatory requirements for energy
conservation for DBs in 1995. An Energy Conservation Promotion Fund (ENCON Fund) was also created to
fund energy audits on 1900 DBs. Recently the requirements and procedures for energy conservation in
buildings have been revised where system performance requirements for building envelope, lighting, airconditioning,
and hot water generation are adopted. Moreover, the new building energy code (BEC)
distinguishes different categories of DBs, provides credit for use of solar energy, and introduces a new
option of whole building energy compliance. The authors develop building models from data obtained
from energy audit reports and use them to estimate savings on energy and peak demand from future
new buildings using forecasted energy and peak demand data from the Load Forecast Subcommittee,
a panel tasked to forecast future electric load of Thailand. From a modest level of energy saving in the
first year that the code is expected to be enforced, the level of saving rise to over 10% and 20% annually of
requirement of target buildings in 6 and 12 years respectively.