The influx need to be heated in winter, and if your ventilation vents as required SNIPS (Standard codes and norms), the costs for heating the outside air are quite decent. So, even a natural ventilation system pulls a lot of operation costs.
And now, let’s take my home, which you rated as "nothing special":-).
I do not have any ventilation as I have already written. Only, the hood in the kitchen, working on when the stove running. And the hood in the boiler room, but it is plugged almost all winter)).
The atmosphere in the house is quite comfortable, it is checked. For example, the smell of paint was gone for about three hours. Smells from the kitchen (which also functions as a large living room) are removed more quickly. The air is always pleasant to breathe. My wife and my grandmother can smell a stuffiness very well, tested at a town apartment.
Well, so what.. And the fact that the air comes from the street anyway.
But how? Yes, I do not know). And there are certainly gaps and cracks and a diffuse transfer)) But! On heating it goes much below the average, the cost is high for heating the air outside. Here is an entire economy. The benefits are obvious. Palpable, but never theoretical.
I firmly believe that the processes of water and air transfer in wooden houses have not been studied fully, there are few materials on this subject, and to interpolate a general theory for specific conditions is not correct.
Once, I spent three days searching for the answer to a simple question - how much air passes through the beam, a diameter of 20 cm in the longitudinal direction per hour .. And I found nothing. Even a hint of what I searched.
And then, how to respect the theorists?
