G-Tools GT 160 Inline Fan with Controller & Prima Klima PK 2603 Carbon Filter800 m³/h

The GT 160 fan and PK 2603 filter bundle gives indoor growers a matched, thermostat-controlled extraction system at 800 m³/h. It suits grow rooms where stable temperature and reliable odour control matter - without overcomplicating the setup or inflating the running costs.

Extraction kits often fall apart because the fan and filter are mismatched. A filter too restrictive for its fan starves airflow; a filter too open lets odour through. G-Tools pair the GT 160 directly with the Prima Klima PK 2603 to avoid that problem. The filter's activated carbon bed is sized to work at the 800 m³/h the fan actually delivers, so you get full odour scrubbing without sacrificing extraction performance.

The built-in thermostat is the feature that separates this kit from a basic fan-and-filter combo. Set your target temperature and the fan ramps up or backs down automatically. Crucially, the speed control works by adjusting voltage rather than restricting current. That means the fan draws the same current at low speed as at high speed - your electricity bill does not creep up simply because you are running the fan continuously at a reduced setting.

An 800 m³/h fan handles grow rooms up to roughly 10-15 m² depending on ceiling height, lighting heat load, and how tightly you want to control humidity. Pair this kit with a Sanlight LED fixture and the thermal load stays manageable - LED runs cooler than HPS, so the thermostat will hold a stable set point without the fan running flat out. For larger spaces or particularly warm summer conditions, consider a second intake point to give the fan clean air to pull through.

Installation is straightforward. Mount the filter vertically where possible - horizontal mounting reduces carbon contact time slightly. Connect the fan directly to the filter flange using a short section of acoustic ducting to cut transmission noise. Route the exhaust duct as directly as possible; every bend reduces effective airflow. The fan controller can be wall-mounted or left in-line. Once set, the thermostat handles day-to-day adjustments without further input.

Grower’s Note: Carbon filters have a finite lifespan - typically 12 to 18 months under normal use - and humidity accelerates carbon saturation significantly. Keep relative humidity below 70 % in the extraction path and the PK 2603 will perform well throughout a full growing season. Replacing the filter annually rather than waiting for odour breakthrough is the more reliable approach.

Priced at £279, with free UK delivery.