Calculate Your Extraction Rate
Enter your grow tent dimensions and setup – the calculator shows how many m³/h your exhaust fan needs to move.
Ventilation Calculator
Rule of thumb: tent volume × 60 + lamp watts × ⅓ + 20 m³/h per metre of ducting · +10 % per 90° bend · carbon filter +30 %.
Tent volume —
Net requirement —
Recommended fan rating —
Duct size —
Better to buy one size up and throttle it with a fan controller – quieter and more efficient than a fan running at its limit.
Everything for your ventilation
