Good day to all!
We are developing a project of a residential building with 6 floors, where we need mixed ventilation: natural in certain environments and mechanically in others such as bathrooms and kitchens. The individual air conditioning equipment, like the inverters splits and multisplits available in Paraguay, do not have air injection, so we can use the windows to meet the requirements of natural ventilation. Some consultants have told us that we will not be able to meet the requirements of versions 4 if I do not use a mechanical injection. My problem is that the owner seeks to meet the requirements without increasing the initial investment too much, so we are already using the resources to improve the conditions of passive conditioning, among others. Is it possible in any of the classification systems to comply with the previous requirement of ventilation with natural ventilation of windows in residential spaces?