a, b, c	second-order polynomial regression coefficients
e	thickness of the insect-proof screen (µm)
h	height of the vent openings (m)
ui	air velocity inside the greenhouse (m·s−1)
uo	outside wind velocity (m·s−1)
us	air velocity through the screen (m·s−1)
ux	longitudinal component of air velocity (perpendicular to the vents)
x	absolute air humidity (g·g−1)
Cd	total discharge coefficient of the opening
Cd,LH	discharge coefficient due to the shape of the opening
Cd,φ	discharge coefficient due to the presence of insect-proof screens
Dh	diameter of the threads (µm)
Dhx	diameter of the weft threads (µm)
Dhy	diameter of the warp threads (µm)
Di	diameter of the inside circumference of the pore (µm)
Dr	thread density (threads·cm−2)
Fφ	pressure drop coefficient due to the presence of an insect-proof screen
G	volumetric ventilation flow (m3·s−1)
Go	leakage volumetric airflow when openings are closed (m3·s−1)
HRo	outside relative air humidity (%)
Kp	screen permeability (m2)
Lpx	length of the pore in the weft direction (µm)
Lpy	length of the pore in the warp direction (µm)
LV	length of the vent openings (m)
P	Pressure (Pa)
R2	coefficient of determination
Rep	Reynolds number based on the insect-proof screen’s permeability
Ro	incoming shortwave radiation (W·m−2)
S	sector
SA	greenhouse area (m2)
SCS	vertical cross-section surface perpendicular to the direction of the inside airflow (m2)
Sp	area of the pore (mm2)
SV	surface area of the vent openings (m2)
T	air temperature (°C)
Y	inertial factor
∆Tio	inside to outside temperature difference (°C)