I think your opinion is very one sided. I myself work for the catholic church with children. This doesn't mean that I'm a pedophile. But there are still massive problems inside the church.
In the ventilation system there is filter for the incoming air and I always find some insect in them but they can't get through. I the only way for insects to get in is through the front door, for the garden door I have a net.
I would say "Pretty basic just works" it was adjusted during construction of the house and as long as you don't do any fundamental changes to ventilation system there is no need to readjust.
Most of the time I don't think about it at all. There is have a central ventilation system with a heat exchanger. So I don't even have to think about opening the windows for fresh air.
I live and own a passive house: Feel free to ask questions :)
