Nowadays, passive cooling system is no longer the top priority among the design concept for public buildings in Indonesia. However, the passive cooling system once became an effective building technology to cope with tropical climate in the Dutch colonial era. Semarang City, Central Java, has an outstanding heritage building equipped with passive cooling system, named Semarang Cathedral Church. This church was also built in the Dutch East Indies era and inaugurated in 1940. Research was held in 5 (five) times of church service and 9 (nine) measuring points where low ventilation was opened and closed during church service. Dry bulb temperature, effective temperature, relative humidity, and air velocity, were measured. The purpose of this study was to examine the thermal condition of the building with only passive cooling system. Thermal measurement and site observation were carried out. The results of this study show that there is a significant change on thermal condition inside building as the effect of low ventilations. The measuring points near the low ventilation (A, C, G, and I) have lower effective temperature and relative humidity in compared with other points, and also have higher air velocity. This study can provide the understanding of people about the importance of passive cooling system in public buildings.

1.
L.
Bouraba
, Les compartiment de la demeure Algéroise (l’art de vivre).
Architecture and Islamic Art in Algeria and Européan Renaissance
.
Constantine Algeria
, June
2014
.
2.
Georg
Lippsmeier
,
Tropical Building
. 2nd edition. Syahmir Nasution, translator.
Jakarta
:
Erlangga
,
1994
.
3.
Harsritanto
,
I.R.
Bangun
,
Ratih
Widiastuti
and
Hana Faza Surya
Rusyda
.
Study of Outdoor Thermal Comfort in Old City Open Space Case Study Semarang Old City
.
Proceedings of International Conference Of Vocational Studies And Applied Research
,
2017
.
4.
Harsritanto
,
I.R.
Bangun
.
Universal Design Application through South Korea Redevelopment (A Study Review
).
Proceedings of Seminar Nasional Sustainable Architecture and Urbanism
.
Universitas Diponegoro
,
2016
.
5.
Heinz
Frick
and
F.X. Bambang
Suskiyatno
.
Dasar dasar Arsitektur Ekologis
.
Yogyakarta
:
Kanisius
,
2007
.
6.
C.
Kukreja
,
Tropical Architecture
.
New Delhi
:
Tata Mc-Graw Hill Publishing Company Limited
,
1997
.
7.
F.C.
Houghten
and
C.P.
Yagloglou
.
Determining Lines of Equal Comfort
.
Transactions of the American Society of Heating and Ventilating Engineers
29
.
1923
, p.
163
.
8.
ASHRAE
.
Handbook of Fundamental Chapter 8 Physiological Principles, Comfort, and Health
.
USA
:
ASHRAE
,
1989
.
9.
ASHRAE STANDARD 55
.
Thermal Environmental Conditions for Human Occupancy
.
USA
:
ASHRAE
,
2004
.
10.
Augi
Sekatia
,
Efektivitas Ventilasi Bawah pada Kenyamanan Termal dan Nilai PMV Pada Gereja Katedral Semarang
.
Semarang
:
Universitas Diponegoro
,
2015
. Thesis.
This content is only available via PDF.