Fun as always to follow your shenanigans :)

The ventilation should be controlled so that negative pressure prevails. With excess pressure, there is a risk of hot, moist air escaping into the frame of the house. In cold weather, the air can precipitate condensation on cold building parts further out in the wall and roof construction. So with good ventilation, there is a negative pressure in the house, where the moisture is vented out of the villa which makes it impossible for warm and moist air to find its way into the home's construction because it is instead ventilated out of the house.

@pellejutterstrom

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at the beginning I thought just like you that you should have excess pressure to "protect the house like a bubble", but I have since learned that this is not the case, however, maybe the houses you have the plants in do not have the same sensitive wall construction as a normal house with insulation etc

@DeyselFarm

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Very interesting, thank you!

@pellejutterstrom

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@@DeyselFarm at the same time, you have a type of business that may need to be protected and you don't want to risk impure air entering through the walls and contaminating the cultivation, so then a positive pressure bubble can be good. much like when I design operating rooms or labs where we operate with excess pressure. so the choice is a bit between the house or the business =)