Vivosun Inline Fan R4 Air Filtration Kit w/ Thermometer - 4" Duct

The VIVOSUN thermometer and hygrometer provides professional-grade accuracy with ±0.1°F temperature precision and ±5% humidity accuracy. It measures temperatures from 14°F to 122°F and humidity from 10% to 99%. The device updates readings every 10 seconds, giving you real-time environmental data.

The variable speed controller allows you to adjust the fan speed from 0-100% of its maximum 190 CFM capacity. Simply turn the dial to increase or decrease airflow based on your growing phase needs. Lower speeds are ideal for seedlings, while maximum speed provides optimal ventilation during flowering.

This 4-inch, 190 CFM system is ideal for small to medium grow tents ranging from 2'x2' to 4'x4', or grow rooms up to 95 cubic feet. The system effectively handles spaces with ducting runs up to 8 feet while maintaining strong airflow performance.

The 1200+ RC 412 grade carbon filter uses Australian Virgin Charcoal for superior odor elimination. At 4" x 14", it provides a substantial surface area to effectively remove pungent smells, undesirable odors, and particulates from your growing environment.

Regular maintenance includes cleaning the fan blades monthly and replacing the carbon filter every 12-18 months, depending on usage. Periodically check ducting connections to ensure they remain secure and airtight.

The Inline Fan R4 operates at less than 31 dB, making it quieter than a whisper and virtually silent in most environments. Even at full 190 CFM capacity, the noise level remains minimal, ensuring a discreet operation.

Yes, the R4 Air Filtration Kit uses standard 4-inch connections compatible with other VIVOSUN grow tent systems and accessories. This kit eliminates compatibility concerns by providing all necessary components together. For more tips on optimizing your space, check out our complete grow room setup guide.