Newby ? on converting cellar into grow room.

[Unregistered]

Considering converting a cellar into a grow room, but have many questions. The temp in the winter will be around 55 inside. If I section off a portion that is 6x6x8 and use two 400 watt MH lights, do you think I would have to add a heater? I am also wondering what my ventilation needs would be. My intake and exhaust will either be coming from inside of the cellar or from outside. Any help would be greatly appreciated.

[JamesRosemary]

Did,you find a solution for your question?