4 x 4 grow tent your thoughts.

Im thinking about getting a 4x4 grow tent but have heard both good and bad things mostly heat issues. I want to set it up in my bedroom so what are your thoughts and suggestions equipment ? Want to use a 400 Watt hid.)

As long as you keep good air flow going then you shouldn't have any heat problems. If your really that worried though you can use LED lights instead.

good inline fan will take the heat out so what is the problem

As everyone said, get fans! 1 inline fan and two small fans and you'll be fine. Youre gonna want to get a carbon filter as well.

Bigger is better if you have the room. I currently run a 5' x 5' Growlab for flower only and I wish I had more room. And like the other dude said you need proper ventilation. I tried running a 1000 watt wing reflector asa test before i put my plants in, and temps went up to 110 F. I did some rerouting and put my vented hood in and now I run a 1000 watt hps with an average temp of 73-76 with lights on.