Hi seedlessceo
You are going to need three fans.One small fan 6" or 8" to circulate the air inside the tent.The second fan to draw air through the light and out of the
tent.The third fan is for the carbon scrubber.If you can set the tent in the corner of the room near a window would be the best.The first fan can draw fresh air into the tent and circulate it too.Place it in front of the vent in the tent.Fan for the light can draw air from the room or from the window to cool the light and exhaust into the room or out the window.You say its' getting to be winter,it can help heat the room also.The carbon scrubber fan is on the out side of the tent.Drawing air from the tent into the scrubber and out into the room.Circulateing fan you can get at wally mart or any box store.The fan for the light I do and would use a can fan{vortex fans}plantlightinghydroponics.com has the best price on vortex fans.A 4" fan for the light.A 6" can fan for the scrubber you dont want any sticky air coming from the tent.I do know the 6" can fan has a 49DP noise level,which is low in noise.
Are you using soil or hydroponics? Hope This will help and good luck.