Growing questions
The questions growers ask most, with an honest answer and the gear that goes with it. Can’t find yours? Ask below.
- Ventilation & odour Should I vent my grow tent outside or into the room? Outside is better for temperature and humidity control. If that's not possible, vent through a carbon filter into the room, if the room can handle ... Read the answer →
- Ventilation & odour Why are my grow tent walls sucked inwards? Your fan is pulling out more air than the intakes let in. A little suction is good for odour, but if the walls are bowing in, the fan is too strong... Read the answer →
- Ventilation & odour Do I need a fan inside the grow tent as well? Yes. A small oscillating fan keeps the air moving between the leaves, strengthens stems and stops damp pockets. Read the answer →
- Ventilation & odour How do I make my grow tent fan quieter? Turn it down with a speed controller, hang it so it doesn't touch anything, and keep the ducting straight. Read the answer →
- Ventilation & odour How long does a carbon filter last, and when do I replace it? Manufacturers commonly quote about one to two years, but replace it when you smell odour again, whatever the calendar says. Read the answer →
- Ventilation & odour How do I get rid of grow tent smell? Run the exhaust through a properly sized carbon filter and keep the tent under slight negative pressure with no leaks. Read the answer →
- Ventilation & odour Where should the air intake and exhaust go in a grow tent? Exhaust at the top, where the hot air collects. Intake low, ideally on the opposite side, so fresh air sweeps across the plants. Read the answer →
- Ventilation & odour Do I need a speed controller for my exhaust fan? Yes, I'd get one. A fan at full speed is usually louder and pulls more air than the tent needs. Read the answer →
- Ventilation & odour Do I need an inline fan, or is a clip fan enough? You need both. The inline fan swaps the air in the tent, the clip fan only stirs the air that is already there. Read the answer →
- Ventilation & odour What is the best ventilation setup for a 1 x 1 m grow tent? An inline fan of roughly 150 to 250 m³/h pulling through a matching carbon filter, some ducting, and one small clip fan inside. Read the answer →
- Ventilation & odour How do I pick the right carbon filter for my tent? Match the flange diameter to your fan (100, 125, 150 or 200 mm) and choose a filter rated at or above the fan's airflow. Read the answer →
- Ventilation & odour What fan size (m³/h or CFM) do I need for my grow tent? Work out the tent volume (width x depth x height in m³) and pick a fan that can move at least that much air per minute, so roughly 170 m³/h for a 1... Read the answer →
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