AC Infinity CLOUDLINE H4 4" Inline Duct Fan — 212 CFM, IP65 Moisture-Resistant with 10-Level Speed Controller

The AC Infinity CLOUDLINE H4 is a compact, quiet 4-inch inline duct fan engineered for mushroom growing and humid environments, offering 212 CFM airflow, IP65 moisture resistance, and a 10-level speed controller for precise ventilation.

Built to move fresh air efficiently in confined, high-humidity spaces, the CLOUDLINE H4 combines a brushless EC motor with PWM control and dual ball bearings to deliver reliable, low-noise performance. Its IP65 rating protects internal components from moisture and dust, making it suitable for grow tents, mushroom racks, bathrooms, or any application where humidity and cleanliness matter. The included speed controller gives growers and hobbyists micro-adjustable airflow to manage temperature, humidity, and CO2 levels without cycling noisy equipment.

How does the CLOUDLINE H4 keep a mushroom grow room stable?

The fan supplies steady air exchange to remove stale air and introduce fresh air, helping to regulate humidity and CO2. Because it runs quietly and can be tuned across ten speeds, it prevents sudden pressure swings that can stress delicate crops.

• 212 CFM peak airflow to refresh small to medium grow spaces
• 10-level speed controller for gradual airflow adjustments
• Low 27 dBA noise output reduces disturbance to environments
• EC motor and PWM control for consistent, repeatable performance

Will the H4 survive humid, dusty conditions commonly found in grows?

Yes—its IP65-rated housing seals the fan against water spray, dust and debris, preserving motor electronics and bearings. The robust construction and dual ball bearings extend service life even under continuous operation in damp settings.

• IP65 protection resists moisture and particulates
• Dual ball bearings improve durability during prolonged use
• Sealed housing minimizes maintenance and cleaning

How quiet and energy-efficient is the CLOUDLINE H4 during daily use?

The H4 is engineered for low noise and low power draw: it produces just 27 dBA at typical speeds while the EC motor and PWM input optimize energy consumption. That combination means continuous ventilation without large electricity costs or disruptive sound.

• Rated noise level around 27 dBA for minimal background sound
• EC brushless motor reduces electrical loss and heat
• PWM-compatible drive enables fine speed control and efficiency

How easy is installation and control for an inline fan this size?

Installation is straightforward: the 4-inch duct size fits standard ducting and the fan's compact footprint simplifies mounting inside tents or on racks. The included speed controller provides ten discrete levels so you can dial in airflow without additional controllers or wiring.

• Duct size: 4" to match common flexible and rigid ducting
• Compact dimensions: 6.9 x 11.9 x 7.4 inches for tight spaces
• Included 10-level controller for plug-and-play adjustment

Who is this for? The AC Infinity CLOUDLINE H4 is aimed at hobby growers, mushroom cultivators, and anyone who needs reliable ventilation in compact, humid environments. It suits small grow tents, closet-style fruiting chambers, bathroom exhaust upgrades, and any application where quiet, moisture-resistant airflow with precise speed control is required. If you need a compact inline fan that balances airflow, longevity, and low noise while resisting harsh conditions, the H4 is built to meet those needs.