AC Infinity CLOUDLINE H4 Quiet Inline Mixed-Flow Duct Fan 4"

Specialised 4-Inch IP65 Mushroom & High-Humidity Cultivation Duct Fan with 10-Speed Controller

Engineered specifically for mushroom cultivation, monolithic fruiting chambers, and ultra-high-humidity grow environments, the AC Infinity CLOUDLINE H4 brings heavy-duty environmental sealing to automated air exchange. Delivering up to 212 CFM (360 m³/h) of airflow with an average power draw of just 18 Watts, the H4 provides continuous fresh air exchange (FAE) while helping maintain precise humidity and controlling harmful CO₂ build-up.

Unlike standard grow fans rated for lower humidity, the CLOUDLINE H4 features an upgraded IP65 ingress protection rating. Its housing and internal components are completely dust-tight and sealed against water streams, airborne fungal spores, and continuous humidity levels up to 95% RH. Powered by a PWM-controlled EC motor, the fan operates at a whisper-quiet 27 dBA and includes a wired 10-speed digital controller with backup memory. As part of the UIS™ platform, the H4 connects directly with smart controllers for dynamic climate schedules and app automation.

What Makes It Stand Out

• Mushroom Cultivation Specialised: Designed from the ground up to handle high moisture, prevent heavy CO₂ accumulation, and maintain fresh air exchange for optimal mushroom pinhead formation and fruiting.
• IP65 Water & Spore Proof Sealing: Heavy-duty enclosure completely resists dust, airborne debris, liquid splash, and extreme moisture in environments running up to 95% RH.
• Ultra-Quiet 27 dBA EC Motor: Digital PWM speed regulation enables smooth operation down to minimal RPM levels without creating electric motor hum or vibration.
• 10-Speed Digital Controller: Granular 10-level airflow control lets you fine-tune intake or exhaust strength, featuring built-in memory that retains your settings after power disruptions.
• Mixed-Flow High Static Pressure (324 Pa): Stator blades and hydrodynamic wind circles push fresh air through restrictive HEPA filters, duct runs, and specialised mushroom grow tents.
• UIS™ Platform Integration: Connects directly into AC Infinity smart controllers (such as CONTROLLER 69) for Wi-Fi app monitoring, VPD triggers, and automated climate scheduling.
• Easy-Clean Detachable Motor Box: Central impeller assembly easily unclips from the mounting bracket for fast cleaning and maintenance without taking down installed ductwork.

Technical Specifications

Real-World Applications

• Mushroom Growing & Fruiting Tents: Primary ventilation fan to purge CO₂ pockets and supply fresh oxygen during the fruiting phase without drying out substrate beds.
• High-Humidity Propagation Chambers: Exhaust or fresh air intake for seedling domes, clone chambers, and tropical plant enclosures requiring high humidity (85–95% RH).
• Small Grow Tents (2×2 ft): Compact, quiet exhaust solution for micro-grow spaces and small indoor tents requiring precise temperature and humidity extraction.