AC Infinity AIRLIFT S-Series Shutter Exhaust Ventilation Fan with Speed Controller Size:16 in and a 4x4 tent floor

and a 4x4 tent floor is 48 in square

Rolled edges give the shell rigidity

Remember - keep your pH probe wet

where a 4 g packet would fall short

AC Infinity AIRLIFT S-Series Shutter Exhaust Ventilation Fan with Speed Controller Size:16 in and a 4x4 tent floorAC Infinity AIRLIFT S Series shutter exhaust fan with speed control The AIRLIFT S Series exhausts heat, moisture, odor, and dust out of a room through a weather sealed shutter. Four sizes cover the range: 631 CFM at 10 inches, 830 at 12, 1513 at 14, and 2560 at 16. A PWM controlled EC motor pushes that airflow while holding noise and power down. Steel shutters close automatically when the fan stops, sealing out weather and pests. EC motor shutter fan