Origin: The Passivhaus concept began in Germany in the late 1980s and early 1990s, aiming for very low-energy buildings.
The passive house cuts heating and cooling demand through a well-insulated, airtight shell, high-performance glazing, thermal-bridge reduction and heat-recovery ventilation. A compact form, sensible orientation and active shading keep it comfortable with little energy.
Vietnam hot and humid climate differs from Europe, so adapt: prioritise heat control, shading, roof and wall insulation, and ventilation with humidity management. In damp humid coastal regions, ventilation needs dehumidification to avoid mould within an airtight shell. Coastal storms demand strong windows and fixings. This is a high standard with higher upfront cost, so take careful advice before deciding.
