VIVOSUN D4 4" AC Inline Fan 4-inch, 195 CFM — Quiet 2500 RPM Ventilation for Grow Tents

The VIVOSUN D4 4" AC Motor Inline Fan delivers up to 195 CFM of targeted airflow in a compact, quiet package ideal for ventilating grow tents, small rooms, and duct runs.

Compact and purpose-built, this 4-inch inline blower combines a 2500 RPM motor with an aero-optimized impeller to move air efficiently while minimizing noise and heat. The ETL-listed motor includes automatic reset protection and a flame-retardant junction box, making it a practical choice for continuous ventilation in horticulture setups, workshops, and small HVAC tasks. Its removable housing and simple flange connections make installation, cleaning, and maintenance straightforward.

How much airflow and performance can I expect from the D4 fan?

The D4 model produces up to 195 cubic feet per minute (CFM) at peak speed, powered by a 2500 RPM AC motor that sustains steady ventilation through 4-inch ducting. It is efficient for compact environments where consistent air exchange is needed.

• Peak airflow: 195 CFM for effective ventilation
• Motor speed: 2500 RPM for sustained performance
• 4-inch duct size compatibility with common grow tent hoses

Will the fan run quietly and stay cool during continuous use?

The fan uses a flow deflector and streamlined impeller design to reduce turbulent noise, delivering operation around 30 dB—comparable to a quiet room. The motor includes an automatic reset to guard against overheating, and the junction box is made from flame-retardant materials for added safety.

• Noise level about 30 dB for low-disturbance use
• Automatic reset motor protection prevents overheating interruptions
• Flame-retardant electrical box for enhanced safety

How simple is installation and maintenance for this inline blower?

Installation is straightforward: both intake and exhaust ends have flanges with locking tabs for secure hose attachment, and the 5.9-foot power cord gives flexible placement. The housing, impeller, and blades are removable, letting you clean or service the fan without special tools.

• Flanged ends with locking tabs for quick duct coupling
• 5.9-foot cord for flexible plug positioning
• Detachable housing and impeller for easy cleaning and service

Where is this inline fan most useful in a home or grow setup?

The VIVOSUN D4 is sized for small- to medium-scale ventilation tasks: ideal for single grow tents, small rooms, basements, bathrooms, or kitchen exhaust where space and noise matter. It improves air circulation, helps manage humidity and temperature, and reduces stagnant air pockets.

• Well-suited to 4-inch ducted grow tent systems
• Effective for small room or basement ventilation
• Helps control humidity, odors, and heat build-up in confined spaces

Who is this for: growers, hobbyists, and homeowners who need an efficient, low-noise inline fan for compact duct runs. Choose the VIVOSUN D4 if you value a balance of solid airflow (195 CFM), quiet operation, safety features, and easy installation and maintenance in a 4-inch form factor.