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Extraction Fan Ø150 mm 300 m³/h
This 150 mm axial extraction fan rated at 300 m³/h occupies the middle ground between compact 125 mm models and larger centrifugal systems. At 300 m³/h, it handles grow tents from 80 x 80 cm up to 100 x 100 cm under lighting up to 250W HPS or equivalent LED. The 150 mm bore diameter reduces air velocity compared to a 125 mm fan at similar throughput, which translates directly to lower aerodynamic noise in the ducting. Lightweight inline design requires no mounting brackets — slide into any 150 mm port, secure with hose clamps, and connect to power. A cost-effective step up in airflow capacity for growers who have outgrown their 125 mm setup.
150 mm extraction fan at 300 m³/h – right-sizing airflow for medium grow tents
Moving from a 60 x 60 cm tent to an 80 x 80 or 100 x 100 cm setup changes the ventilation equation significantly. The air volume roughly doubles, heat output from stronger lighting increases, and the 185 m³/h fan that worked fine before no longer keeps temperatures in check. This 150 mm axial extraction fan at 300 m³/h bridges that gap without jumping straight to a centrifugal system. It delivers enough airflow for medium-sized growing environments at a fraction of the cost. Growers running smaller setups can compare this with the Can-Lite 300 carbon filter for a matched extraction and filtration setup in similar capacity.
Airflow math: when 300 m³/h is the right number
A 100 x 100 x 200 cm grow tent contains 2 m³ of air. At 60 air exchanges per hour — the widely accepted minimum for indoor cultivation — the baseline requirement is 120 m³/h. But real-world conditions push that figure considerably higher. Every metre of ducting adds friction loss. Each 90° bend reduces effective airflow by an estimated 15-20%. A carbon filter connected inline can reduce throughput by 25% or more with an axial fan. After accounting for these losses, the 300 m³/h rated capacity provides sufficient margin for a tent up to 1 m² under 250W lighting. Beyond that — 400W HPS or larger tents — the pressure losses become too significant for an axial design, and a centrifugal extractor maintains better performance. The 100 mm extraction fan at 105 m³/h remains suitable for smaller spaces where less airflow is needed.
The 150 mm diameter advantage
Physics works in favour of larger duct diameters. At 300 m³/h, air moves through a 150 mm duct at approximately 4.7 m/s. The same volume through a 125 mm duct travels at 6.8 m/s — over 40% faster. Higher velocity creates more turbulence, more turbulence generates more noise. Choosing 150 mm ducting for the same airflow capacity results in a noticeably quieter system. This matters especially in residential environments where the fan runs continuously through night cycles. The 150 mm accessory ecosystem — 163 mm aluminium ducting, filters, connectors — is well-established and priced between the 125 mm and 200 mm ranges. If your tent has a 150 mm port, or you are willing to use a 125-160 mm ducting reducer, this diameter offers an optimal balance of performance, noise level, and component cost.
Real-world setup considerations
Mount the fan at the highest point of your grow space — heat accumulates at the top and extraction is most efficient there. Route exhaust ducting as directly as possible to the outside or an adjacent well-ventilated area, minimising bends to preserve effective airflow. Position fresh air intake at ground level on the opposite side to create diagonal airflow across the entire canopy. If using a carbon filter, select one rated at or above 300 m³/h with a compatible flange diameter to avoid restricting the fan. Remember that axial fans are more sensitive to back-pressure than centrifugal models — the gap between rated and actual airflow widens as inline resistance increases.
This 150 mm extraction fan ships from plantandflower.be with fast delivery across Belgium. Practical airflow for growers scaling up their setup without over-engineering their budget.
What grow tent size works with a 300 m³/h extraction fan?
A 300 m³/h fan handles tents from 80 x 80 cm up to 100 x 100 cm under lighting up to 250W HPS or equivalent LED. For tents at 120 x 120 cm or larger, or setups running 400W+ lighting, the thermal load typically exceeds what this fan can manage and a higher-capacity extractor is recommended.
Why choose 150 mm over 125 mm if both fit my tent?
At similar airflow rates, the larger 150 mm diameter moves air at lower velocity, reducing turbulence and noise. The 300 m³/h capacity also provides over 60% more airflow than a typical 125 mm fan at 185 m³/h. If your tent has both port sizes available, the 150 mm option delivers a quieter, more capable system for a modest increase in component cost.
How much airflow does this fan lose when connected to a carbon filter?
Axial fans lose a higher percentage of rated airflow against back-pressure compared to centrifugal designs. Expect effective throughput to drop by roughly 30-40% with a standard carbon filter connected inline. For critical odour management, a centrifugal extractor maintains better performance under filter resistance. For moderate filtration needs with a low-resistance filter, this fan remains functional.
Can I use this 150 mm fan as an intake fan paired with a larger extractor?
This is one of the best use cases for an axial fan. Mount it at a lower tent port with airflow directed inward while a more powerful extractor pulls air out from the top. The 300 m³/h intake capacity ensures strong fresh air supply, improving temperature distribution and humidity control compared to passive intake vents alone.
