ventalation

HI. is it necessary to buy an extra fan to do the intake for a 4*4 tent that placed in a small room with air-conditioner that takes only a few minutes to cool or heat the room . i was watching some of the grow videos on youtube and i noticed that some of them are not using intake fan in their...

When is the best time to use inline intake fan and inline extractor fan for ventilation pics of my plants she had no fans on in there just a cfl 300w dual spec

I'm going to start a grow room soon and would like some advice. Is it possible to use the materials below in a typical 8h x 15L x 11w bedroom with 4x4 tent. Bedroom temps are around 70-80 summer and winter. Pics of room are below. I will be exhausting out a 2nd story window, and intake will...