So i just finished reinforcing a small 8x6 aluminum green house with 2x4s n 3-6 mm polyurethane plastic and i think its sea worthy now , i ran both sides with 4 inch mesh screen for venting. So about 16 ft of 4 inch vent . Brought temps down to about 5 degrees above temp outside. Without those vents it was sweltering in their. Now my question is since its 80 degree weather at times should i always keep those vents open and close em in the winter like? Gonna transplant a few plants out there soon and just curious about ventilation issues.