Active Air Commercial Humidifier - 75 Pint

Both units share the same industrial-grade motor, direct water line connection, and multi-directional fogging head design. The key difference is output and coverage: the Active Air 200 Pint Humidifier delivers 200 pints/day across up to 1,614 sq ft, while this 75 Pint model is sized for spaces up to 320 sq ft. If your grow room falls within that footprint, the 75 Pint unit provides the same commercial-grade build at a capacity better matched to the space — avoiding the energy and water overhead of an oversized unit.

The unit is designed for direct water line connection via 1/4" tubing. At 75 pints per day output, a manual reservoir would require multiple refills daily — the direct line connection is what makes continuous unattended operation possible. Ensure your water supply line is accessible near the installation point before setup, and consult the manual for any inline filtration recommendations based on your water quality.

Yes — plugging the unit into a humidity controller's outlet allows automated on/off cycling based on your RH setpoint. For growers needing to manage both high and low humidity levels, this unit pairs perfectly with an Active Air Dehumidifier - 110 Pint for total environmental stability. The 0.82A draw is well within the capacity of most standard humidity controllers.

Ultra-fine mist produces droplets small enough to remain suspended in the air and be absorbed as true ambient humidity rather than settling on plant surfaces or growing media as liquid water. Coarser output from lower-quality humidifiers can wet leaves and substrate directly, creating surface moisture conditions that promote mold, mildew, and root zone issues. Fine mist raises the VPD-relevant humidity throughout the space without introducing free water where it isn't wanted.

Position the unit at or slightly above canopy level, with the fogging head directed toward the center of the room for the most even distribution. Avoid placing it directly beneath an exhaust fan or intake vent, where moving air will disperse the mist before it can raise ambient humidity effectively. In a grow tent, placing the unit just inside the tent opening with the fogging head angled inward is a common and effective configuration, especially when used in conjunction with an Active Air 6" Inline Duct Fan - 400 CFM to facilitate air exchange.

Cleaning frequency depends largely on your water hardness — mineral-rich water accelerates scale buildup on the fogging head and internal components, which reduces mist output and can shorten motor life over time. In hard water areas, inspect and clean the fogging head every two to four weeks. Using filtered or softened water can significantly extend service intervals. Refer to the manual for the manufacturer's recommended descaling procedure and approved cleaning solutions.