Looking to ventilate my greenhouse with a charcoal filter for smell. Temps here get to 100+ In summer and I need what ever I can to keep it cool. I’m running just a basic 15x7x7 plastic greenhouse. Wondering what cfm inline fan I should run and what size. I was thinking maybe a 10” or 12” hooked upto a charcoal filter outside the greenhouse and of that run some ducting to an exhaust system inside with smaller size ducting (6” or 8”) that will hang above the plants and have 4 main vents to suck from, 1 on each corner. If there are any flaws with this plans that you see I’m curious to hear them and am open minded to their ideas.
carbon outside can be serioulsy blocked by rain or hligh humidity I'd be cautious tho to the best vent thread on the web Ventilation 101 - Growroom Designs & Equipment - International Cannagraphic Magazine Forums good luck