i have a grow box made of cardboard on my garage and its completely sealed with a 14watt cfl about 1 inch away from the newly planted germinated seed but i burned out my computer fan (noob mistake) and there isnt any fan rite now so can it still sprout without any fan in there???
it will be fine since it hasn't sprouted yet. make sure though once it sprouts that you get a new fan for it. good luck
Agreed. But also keep in mind cardboard is a great place for mildews and such to form and breed due to any moisture. Keep that in mind. Good luck.