Iso-Max 250mm Acoustic Inline Fan — 1,480 m³/hr

Iso-Max 250mm Acoustic Inline Fan — 1,480 m³/hr

A truly clever extraction fan — the Iso-Max is a diagonal-tube fan with a silencer built directly into the housing. Unlike a standard fan + add-on silencer, the Iso-Max is designed from the start as a single unit, giving you the quietest high-airflow extraction in a surprisingly compact footprint.

Why growers choose the Iso-Max 250:

• 1,480 m³/hr airflow with integrated silencer — proper extraction for 1.5m+ tents, dramatically quieter than a standard inline
• Diagonal-tube fan design — rotor-stator system that maximises efficiency and minimises power consumption
• Full-metal housing — robust, doesn't vibrate like plastic-body fans, built for years of continuous use
• Integrated noise-absorbing foam — silencer is built in, not bolted on — no extra ducting runs required
• 250mm (10") flanges — standard UK sizing, pairs with 10" filters and ducting
• Compact for its airflow class — shorter overall length than fan + separate silencer, easier to fit in tight spaces

Who it's not for:

Overkill for a 1.2m tent — use the Iso-Max 150 or 200 for smaller setups. If noise isn't your priority, an open RVK or HyperFan will cost less for the same airflow. Not the quietest option on the market (GorillaBox wins that for absolute silence), but the best integrated airflow-to-noise ratio.

See it running in our Stone shop. Drop by Unit 24, Emerald Way, Stone Business Park (ST15 0SR) to see this fixture set up, or call us on 01785 556355 (Mon–Fri, 10am–5pm) to talk through whether it's the right choice for your tent size and grow style. In stock now with 24hr UK dispatch, or choose click & collect at checkout.