The phrase "enough ventilation" means having a sufficient amount of fresh air circulating in a space to keep it cool, free from odors, and healthy for people to breathe. Full definition
The design of the ceiling provides enough ventilation for a comfortable play time. (babyishcare.com)
It simply isn't enough ventilation for the ferret and will cause health problems. (thoroughlyreviewed.com)
I really enjoy wearing them during summer when it's too warm, I love how these tee dresses allow enough ventilation on my body. (creativefashionglee.com)