

incl. 19% VAT , plus shipping costs


incl. 19% VAT , plus shipping costs


incl. 19% VAT , Free shipping


incl. 19% VAT , Free shipping


incl. 19% VAT , Free shipping


incl. 19% VAT , Free shipping


incl. 19% VAT , Free shipping


incl. 19% VAT , Free shipping

incl. 19% VAT , Free shipping


incl. 19% VAT , Free shipping

incl. 19% VAT , Free shipping
How to Find the Right Grow Exhaust Fan
To find the appropriate exhaust fan, you should consider the area of your grow tent, the location within the building, and especially the type of lighting you use. Modern LED panels generate significantly less heat than outdated sodium vapor lamps—this reduces the required airflow. For small setups under 1 m² (e.g., 40x40 cm, 60x60 cm, or 80x80 cm), a fan with 100–300 m³/h is usually sufficient. For 1–1.5 m², we recommend 300–600 m³/h, and for larger areas from 2 m², accordingly 600–800 m³/h. If your tent is under the roof or in a rather warm room, you should plan a bit more generously.
Once you have found the right size, you decide on the type of fan. Asynchronous motors (AC) have been around for a long time; the first was built based on a principle by Tesla in 1882. These can be dimmed or switched with almost any control device. However, the humming noises caused by dimming can be perceived as disturbing. Electronically commutated motors (EC), on the other hand, are significantly more efficient but have the disadvantage that they can only be controlled by special devices. However, they are almost noiseless even when dimmed.
As a rule of thumb: Base area × 300 gives a rough estimate for the exhaust capacity in m³/h—under LED lighting and normal conditions. For sodium vapor lamps or warm rooms, plan accordingly more. In the following overview, we show you suitable fan sizes for common grow tent formats.
Grow Area | Airflow | Exhaust Fan | Exhaust Set |
---|---|---|---|
up to 0.2 m² (40 x 40 cm) | 0 - 100 m³/h | Exhaust fans with 0 - 100 m³/h | Cultivalley Mini 105m³/h |
up to 0.4 m² (60 x 60 cm) | 100 - 200 m³/h | Exhaust fans with 100 - 200 m³/h | Cultivalley Basic 160m³/h |
up to 0.7 m² (80 x 80 cm) | 200 - 300 m³/h | Exhaust fans with 200 - 300 m³/h | 1-Speed • 2-Speed • Thermo |
up to 1 m² (100 x 100 cm) | 300 - 400 m³/h | Exhaust fans with 300 - 400 m³/h | Prima Klima 1-Speed 360m³/h |
up to 1.5 m² (120 x 120 cm) | 400 - 600 m³/h | Exhaust fans with 400 - 500 m³/h | 1-Speed • 2-Speed • Thermo |
up to 2.5 m² (150 x 150 cm) | 600 - 800 m³/h | Exhaust fans with 700 - 800 m³/h | 1-Speed • 2-Speed • Thermo |
When in doubt, it's often worth choosing a slightly more powerful fan. This gives you performance reserves on warmer summer days. Why? If your ventilation is already running at maximum capacity in winter, it will quickly become insufficient in summer—leading to a dangerous temperature rise that could harm your plants and equipment. Also, a larger fan running at a lower setting is usually much quieter than a smaller one operating at full power. |
- 1-Speed: Fan runs constantly at a fixed speed – simple, reliable, and cost-effective.
- 2-Speed: Two fixed performance levels (e.g., 250/400 m³/h) – switchable as needed.
- Thermo: Temperature-controlled fan – automatically adjusts performance to the ambient temperature.