G-Tools Inline Extractor Fan 160mm 2-Speed 400-800 m³/h

The G-Tools 160 mm 2-speed inline fan gives you real control over airflow without buying a separate speed controller. Two hard-wired motor windings mean you get a genuine 400 m³/h low setting and an 800 m³/h high setting - ideal for growers who need to dial back extraction in winter or reduce noise at night.

This fan suits grow rooms running two medium-output lights - two 400 W or two 600 W HPS, or comparable LED wattage. At 800 m³/h the high speed handles peak summer heat easily. Drop to 400 m³/h in cooler months and your heating costs fall without sacrificing adequate CO₂ replenishment.

The backward-curved impeller is worth understanding before you buy. Most budget fans use forward-curved blades, which lose efficiency quickly under static pressure from ducting and carbon filters. Backward-curved blades maintain airflow more consistently when resistance increases. G-Tools quotes up to 15% more airflow over standard designs - a meaningful margin when your filter is loaded.

Installation is straightforward. The fan ships with a wired mains lead so you plug it straight into a standard UK socket. A wall-mounting bracket is included. Use 160 mm acoustic ducting between the fan and your carbon filter to keep noise down further. Position the fan outside the tent or cabinet if heat management inside the space is tight.

For complete odour control, G-Tools recommends pairing this fan with the PK K2603 carbon filter, and we sell that combination as a discounted bundle. Matching fan and filter diameter (160 mm) means no reducer collars, which preserves airflow and reduces turbulence noise. Check your duct run length - for runs over 3 m, the high-speed setting will compensate for friction losses.

Grower’s Note: Two-speed fans suit growers who run a fixed light schedule year-round but face swinging ambient temperatures between seasons. In winter, running at low speed keeps tent temperatures stable without the fan fighting your heater. In summer, switching to full speed removes heat before it stresses plants during the light period. Neither speed requires a separate controller, so there are no analogue dials to drift out of calibration.

Priced at £145, with free UK delivery.