Greenhouse Conditions
Venting
Venting
is critical both to draw out hot air and to provide air circulation
to reduce problems with pests and diseases. Vents can be manual,
electric, or solar (these are triggered to open and close
by the heat of the sun.) Ideally, vents should be placed both
high and low to allow for proper airflow. They should be well
constructed so they can be tightly closed on the coldest days.
Exhaust fans placed high in the greenhouse help push hotter
(upper) air out, while allowing cooler (lower) air to enter.