Mister-Mini Duct-Mounted Atomizing Humidifier

The Trion Mister-Mini (265000-001) is a duct-mounted atomizing humidifier that delivers whole-home humidity by dispersing a fine mist directly into your warm air supply duct. This compact unit operates on 24V power and requires no water pans or pads, making it a clean, low-maintenance solution for controlling indoor humidity levels. Designed for homes where space is tight or traditional bypass and fan-powered humidifiers won't fit, the Mister-Mini mounts directly to the ductwork through a 3.125" x 3.125" opening. The system includes a universal humidistat and a built-in temperature switch that work together to maintain your set humidity level while preventing operation when duct air isn't warm enough for effective evaporation.

• Atomizing Mist Technology: The unit sprays atomized water directly into the airstream, where it evaporates immediately. This eliminates standing water and the stagnant odors, bacteria, and mold growth that can occur with reservoir-style humidifiers.
• Compact Duct-Mount Design: With a mounting footprint of just 3.125" x 3.125", this humidifier fits into tight mechanical spaces where larger units cannot. Installation is straightforward because the unit mounts directly to the supply duct without requiring a bypass plenum or external housing.
• Built-In Temperature Safety Switch: The integrated temperature sensor prevents the humidifier from operating when supply air temperature is too low for proper evaporation. This protects your ductwork from condensation and ensures every drop of water is converted to humidity, not puddles.
• Universal Humidistat Control: The included humidistat can be installed on the wall or in the cold air return duct, automatically turning the unit on when indoor humidity drops below your set point. You maintain consistent comfort without manual adjustments.
• Tilt-Out Nozzle Assembly: The nozzle assembly tilts out for fast access to the atomizing nozzle, strainer, and solenoid valve. Routine maintenance like nozzle cleaning or replacement takes minutes, not hours.
• Brass Water Fittings: All water connections use brass fittings, providing leak-free operation and long-term durability. The 1/4" compression connections are easy to plumb and resist corrosion.
• Adjustable Capacity: Humidity output can be increased or decreased by changing the nozzle size. This allows you to match the humidifier's capacity to your home's actual needs without replacing the entire unit.
• 2-Year Limited Warranty: Trion backs the Mister-Mini with a 2-year limited warranty covering defects in materials and workmanship.

The Mister-Mini requires 24V AC power, typically drawn from your furnace transformer. It connects to a 1/4" water supply line using brass compression fittings, and is designed for installation in the warm air supply duct of forced-air heating systems. The unit works with any furnace that produces sufficient warm air temperature for evaporation, monitored by the built-in temperature switch. The humidistat can be mounted on a wall or in the cold air return duct, depending on your preference and system layout.

Installation involves cutting a 3.125" x 3.125" opening in the supply duct, mounting the unit with the included hardware, connecting the 1/4" water supply line, and wiring the 24V power and humidistat. The tilt-out nozzle assembly allows quick access for periodic cleaning of the atomizing nozzle and checking the water strainer. For areas with hard water, installing an inline water filter (such as a calcium/magnesium filter) upstream of the humidifier is recommended to prevent nozzle clogging from mineral buildup.

• Mister-Mini humidifier unit with mounting bracket
• Universal humidistat
• Atomizing nozzle (installed)
• Mounting hardware
• Installation instructions

The Trion Mister-Mini comes with a 2-year limited warranty covering defects in materials and workmanship. Replacement parts, including nozzles and O-rings, are available for ongoing maintenance and service.

A: The Mister-Mini includes printed installation instructions in the box. A user guide and product overview in PDF format are available on the SupplyHouse product page under the Manuals section, covering installation steps, wiring diagrams, humidistat setup, and maintenance procedures.

A: If the unit isn't producing humidity, first check that the humidistat is calling for humidity and that the furnace is running with warm supply air. Verify 24V power is reaching the unit and that the water supply valve is open. If the nozzle is clogged, tilt out the nozzle assembly and clean or replace the atomizing nozzle. The built-in temperature switch will prevent operation if supply air isn't warm enough.