Photo above is a view from outside of the greenhouse.This is where the air intake for the poly inflation motor is located. There is a screen over the hole and this should be cleaned occasianally to keep the air flowing properly.
Inflation "jumper kits" are used to jump air from roof to gable ends.
The roll-up sides can also be inflated when not in use in winter.
Remember to lock down your sides for inflating during the cold months.
When it warms up again, remove the jumper in the roll-up sides and remove springs to open your roll up sides again.