Anden AS150 High-Capacity Steam Humidifier, 1,200 Pints per Day, 240V 3-Phase

Anden AS150 Steam Humidifier: 1,200 Pints a Day for Large Rooms

The Anden AS150 steam humidifier puts up to 1,200 pints, or 150 gallons, of water vapor into a room each day. That works out to 50 lb of steam an hour. It generates steam with two electrodes that extend into a disposable steam cylinder. Current flowing between the electrodes boils the water directly, with no heating element to scale up. Fill and drain valves work together to hold the right water level for the humidity demand. The internal control board manages fill and drain to keep amperage draw on target. It also tracks run time and signals when the cylinder needs service. An air gap in the fill cap provides backflow protection, and a level sensor prevents overfilling. The unit flushes and refills on a schedule to keep water conductivity in range. After 72 hours with no call for humidity, it drains the cylinder and waits in standby. Steam leaves through a fan pack that mounts on top of the cabinet and needs no ductwork. Its blower moves 665 CFM and measures 53 dBA from six and a half feet away. The fan pack can also mount on a wall away from the humidifier with remote mount kit 5940. The Vapor-logic controller, an RH transmitter, steam hose and drain tubing come in the box. Vapor-logic runs PID humidity control and offers a web interface over Ethernet. It also speaks BACnet and Modbus, with optional LonTalk, for building automation systems. A USB port handles data download, backup and firmware updates. Power is 240V three phase at 48 A, drawing 16.5 kW. Anden covers all parts for five years.

Installing a Commercial Steam Humidifier in a Grow Room

Mount the cabinet level and plumb on a wall, using the lag bolts provided. On a wood stud wall, fasten spanner boards across at least two studs first. Mount it on an exterior wall only when that wall is properly insulated. The space around the unit must stay between 41 and 104°F, with ambient humidity no higher than 80 percent. Leave 36 in of clearance in front for cylinder service. Run supply water in copper pipe only, at a pressure between 25 and 80 psi. Flush the line first, because pipe residue and stagnant water cause foaming. Standard potable or softened water works, with conductivity between 75 and 1,250 µS/cm. Reverse osmosis and deionized water are not recommended for electrode steam. The drain line needs code-approved pipe rated for 212°F, with a 3/4 in inside diameter. Leave a one-inch air gap above an open drain sitting at least a foot below the cabinet. Drain water tempering ships switched on and keeps water entering the drain below 140°F. Use a dedicated breaker of 60 to 75 A for the electrical supply. Steam turns to visible fog as it leaves the fan pack and rises toward the ceiling. Keep beams, pipes and lights outside the non-wetting distances, or the fog can condense and drip. At 70°F and 60 percent RH, Anden lists a rise of 4.8 ft, a spread of 4.7 ft and a throw of 14 ft. Place the RH transmitter centrally above the canopy, shielded from water spray. Service means swapping the cylinder for a new 5872 kit, with no descaling or scrubbing.

Key Features

• 1,200 pints per day: 150 gallons, or 50 lb of steam an hour.
• Electrode steam: Disposable cylinder, no heating element to clean.
• Ductless fan pack: 665 CFM, top mount or remote mount with kit 5940.
• Vapor-logic controller: PID RH control, Ethernet web interface, BACnet and Modbus.
• RH transmitter included: Plus steam hose and drain tubing.
• Built-in safeguards: Fill-cap air gap, level sensor, automatic drain and fill.
• Drain water tempering: Keeps drain water below 140°F.
• Five-year warranty: Covers all parts.

Technical Specifications