Yes... You have to have somewhere to vent that heat though...

Thats why people are going into the attic and such. If you have it exhausting into the room it will get too hot. If you could vent it outside of a window would be fine.

5ft vertical is a bit short for that setup. Is it 5 feet from the bottom of your hood or the top of the closet?

I am in the same type of situation. I needed to vent somewhere but attic was not an option so I am venting out the window. Even then its still hot in the room from the light... Cannot skimp when it comes to ventilation and HID lamps.
GetThisOrDie Reviewed by GetThisOrDie on . Ventilation and odor control.. My setup is a 5 sq ft closet area.. about 5 ft of height. I will be using 400W MH (Hortilux Blue) for vegging, 400W HPS (Hortilux Enhanced Spectrum) for flowering. Super Sun 2 reflector (6" air cooled)... growing space is a closet with nowhere for air to come in/out except the sliding door. What kind of setup would you guys recommend? Keep in mind I know NOTHING about setting this kinda thing up... what kind of fans (size and how many).. orientation of the whole setup (ducting and all).. also Rating: 5