Customer had proper ventilation in his home country and wisely sought out the same in Thailand. There was a clear limit to the budget in this case and certain compromises was therefore made. We did, for example, not use an electrostatic filter and we used Vents ERV instead of Swegons. The indoor air quality is naturally not optimal in this house because of that. But, with that said, our customer was happy and they understood that you get what you pay for.