Growroom in Amsterdam

[FlySky]

I was in Amsterdam and I saw that they tend to put the grow room on the upper floors and never on the ground floor. Are there any particular reasons? The air, humidity ... Dunno. But in three places that I have been, always had the box in the top landing.

[tlranger]

My quess, security

[growdemon]

a lot of flats in Holland, have green houses
I would say for, warmth. Heat Rises. it gets pretty cold there