Investigation on Energy Use in Passive Design House at High Altitude Climate in Malang City, Indonesia

Indonesia is a tropical climate, hence building controlling air ventilation and humid condition have been a challenge to meet residents’ convenience. It is often energy usage that is majorly used to control indoor air climate circulation. The passive design has recently received increasing attention as an option to reduce energy consumption and abate carbon footprint by taking advantage of local climatic conditions of building features. This pilot study seeks to identify the relationships between real energy consumption data and building design data. A dwelling house located in Malang, Indonesia was selected as a sample building for the study which introduces a method to use real energy consumption data to calculate the extra energy use related to tropical indoor thermal conditions. The 24 h observation result was validated through interviews with residents, before analyzing with criteria of ideal climate conditions from the literature study. This study also presents relationships between the increase in mean daily energy consumption data and trends of humidity building design data. In conclusion, this present study establishes the starting point for exploring all features affecting the tropical climate benefits of passive design for building energy efficiency.