Project Description

Project is constructed under the research project by the Faculty of Architecture Thammasat University - Low-Cost Energy-Saving House for Housing in Global Warming - as a prototype of high efficiency housing.

Energy efficient house 1
Thailand bangkok
Nha map
Nha ex

Building Details


New building project


120.11 m²

120.11 m²

120.11 m²


USD 87,653

USD 730



Project Team

Thammasat University

Wattanapattana Company Limited

Asst.Prof. Pusit Lertwattanaruk, Ph.D.

Assoc.Prof. Chalermwat Tantasavasdi

Climate Analysis

Bangkok is in the central part of Thailand where usually experiences a long period of warm weather because of its inland nature and tropical latitude zone. March to May, the hottest period of the year, maximum temperatures usually reach near 40o C or more. The onset of rainy season also significantly reduces the temperatures from mid-May and they are usually lower than 40 o C. Bangkok usually has a short period of winter with a temperature of 20-25 oC. The relative humidity ranges from 70-80% throughout the year.

Bangkok climate graph

Design Approach

Since it is prototype for high efficient house, there is no specific site for this project. So, this house is only fixed for its orientation. For the surrounding, trees should be planted to protect heat gain from radiation to the house.

All functions are oriented corresponding to movements of the sun results in there is a buffer zone to heat. Use technology of material properties to cool down the building along with shading from surrounded trees. Evaporative cooling by using on-site harvested rainwater is applied.

Special Feature

Skylight is added above the stairs to light up the main circulation in daytime.

Collect rainwater on the project site and use in evaporative cooling process for house.

Large openings with shading device are designed for natural ventilation and removing internal heat. Evaporative cooling is applied by dripped water through the chain outside the windows. All of these applications require low cost.

Lightweight materials is selected for bedroom as it is easy to cool down at the nighttime. Thermal mass is used for living room to reduce impact of outside temperature during the daytime.

Building Material

Reinforced Concrete

North = 12mm Gypsum board with steel frame South = 30cm White brick wall East = 12mm Gypsum board with 10cm brick wall West = 30cm White brick wall with 15cm Reinforced Concrete


Grey Fiber Cement Roof Tile

Solar shading systems material - Fiber Cement Blinds

Energy systems

Compact Fluorescent





- 5 Temperature and Relative Humidity sensors - Building is cooled down by passive strategy such as natural ventilation, evaporation, and thermal mass

1.35 kW of PV panel is equipped on the roof. Energy generated, estimated for 4.03 kWh per day, will be used by lighting system, and pump

Lessons Learned