Facade refurbishment for energy saving in tube houses a case study in Hanoi, Vietnam

Phan Anh Nguyen*, Regina Bokel, Andy Van Den Dobbelsteen

*Corresponding author for this work

Research output: Contribution to journalConference articleScientificpeer-review

1 Citation (Scopus)
73 Downloads (Pure)


This paper investigated the energy upgrade potentials of different facade refurbishment options in tube houses of Vietnam. A calibrated Design Builder model was created to simulate energy performance of different cases. Vietnamese technical regulation of energy efficiency building and Dutch standards were the two main guidelines for selection of refurbishing measures. The simulation results showed that applying Vietnamese technical regulation can save up to 9% of energy for heating and cooling. More interestingly, highly insulated facade that followed Dutch standards led to much more favourable results of 21% reduction in air conditioner consumption. It is worth to note that such improvement was by far only achieved with a night-time operation of air-conditioner, as how the system was working in the reference house. Shading devices were also tested on a southwest facade window. Horizontal overhang had very limited benefit of less than 6% reduction in cooling energy. An external blind could save up to 12.6% of cooling energy. However, as all three shading types had a negative effect in heating season, the maximum annual saving was only 7%.

Original languageEnglish
Article number03015
Number of pages6
JournalE3S Web of Conferences
Publication statusPublished - 2019
EventCLIMA 2019: REHVA 13th HVAC World Congress: Built Environment Facing Climate Change - Bucharest, Romania
Duration: 26 May 201929 May 2019


Dive into the research topics of 'Facade refurbishment for energy saving in tube houses a case study in Hanoi, Vietnam'. Together they form a unique fingerprint.

Cite this