I have three passive intakes on my tent, two 8in and one 6in. Problem is the tent's walls still get sucked in pretty hard and I don't feel like spending money on an intake fan. I suppose a fan controller could do the trick but are there work-arounds that would keep me from sacrificing air flow? *When I put my hand on the passive intakes I barely feel any air getting sucked in...? **To give you an idea I can literally lean on the walls from inside and they won't budge because of all the tension.
for the long term a temp controller is a must we can't have a member leaning on the walls for 90 days ..lol www.amazon.com/Inkbird-All-Purpose-Temperature-Controller-Fahrenheit/dp/B07H5GH2YL/ref=sr_1_3?ie=UTF8&qid=1537830879&sr=8-3&keywords=stc+1000 good luck