Efficient Ventilation & Odor Control Solution Upgrade your grow room airflow with the Mars Hydro 4" iFresh Inline Duct Fan Kit, combining powerful ventilation and long-lasting odor filtration in one integrated system. Delivering efficient air exchange, odor control, and smart-ready expansion, it provides a reliable foundation for maintaining a cleaner, more stable growing environment. Powerful Air Exchange with Quiet Operation Powered by an energy-efficient motor, the 4" iFresh inline fan delivers up to 205 CFM airflow to efficiently remove excess heat and humidity while maintaining fresh air circulation in your grow space. Operating at just 26.8 dBA under lab no-load conditions, it provides powerful ventilation performance with reduced noise for a more comfortable growing environment. High-Efficiency Odor Filtration with Refillable Carbon Core The included high-quality activated carbon filter effectively captures unwanted odors, smoke, and VOCs, helping keep your grow space fresher and cleaner. Its refillable carbon core design allows you to replace the carbon instead of the entire filter, extending filter lifespan and reducing long-term maintenance costs. Smart-Ready Ventilation Upgrade Designed with an expansion port, the 4" iFresh inline fan can be upgraded with the MarsPro Add-On Pack for app-based smart climate control. Once connected, growers can monitor environmental data, create schedules, and automate ventilation adjustments for a more precise and convenient grow room management experience. Reliable Air Management for Indoor Growing From efficient air exchange and odor filtration to future smart upgrades, the Mars Hydro 4" iFresh Inline Duct Fan Kit delivers a flexible ventilation solution designed to support healthier growing environments. Whether used as a standalone system or upgraded with smart control, it provides the performance and adaptability modern growers need.