4 ms·

It comes with several disadvantages. Like no air circulation (except air condition, what is probably a must in such a house), mold problems etc. ...

• n1000 7y ago
  That is simply wrong. The passive house standard requires ventilation systems with highly efficient heat exchangers. This makes for good air quality. The massive thermal insulation ensures that no condensation occurs in the interior, i.e. no mold problems. A common problem, however (esp. if inexperienced planners design the house) is too dry indoor climate in winter. This happens if air change rates are too high and no humidity is recovered.
  • bipson 7y ago
    The regulations for Passivhäuser (or houses with the respective efficiency rating) in fact require a ventilation system with heat recovery (since the otherwise necessary open-the-windows-like-a-savage-system wastes too much energy). These nowadays come typically with moisture recovery (which arguably not always works well enough, depends on how much you still need to heat).