GrowCNanswered grow question 3 years ago I have a sealed "lung room". I have my heat, air conditioning and dehumidifier condition the air for the room. That way when the tent's fan is running it sucks in air that is appropriate for my grow. Trying to heat, cool or dehumidify within the tent is very difficult. First, the equipment takes up valuable tent space. And second, the minute you turn on your tent's exhaust fan all your conditioned air gets sucked out. From my experience when a dehumidifier and vent fan fight inside the tent, the fan always wins.