Anden A77 Digital Dehumidifier Control | 35-80% RH Wall-Mount for Grow Rooms

Anden A77 Wall Control for Reading RH at the Canopy

This is a remote wall control that moves the dehumidifier's humidity decision into the room. A unit hung overhead or tucked into a mechanical closet reads the air around itself, which is rarely the air around your plants. It carries its own onboard sensor, shows measured humidity on a large digital display, and takes setpoints from 35% to 80% RH. Accuracy is rated at +/-5% RH with a 3% differential, so expect normal cycling around your number. When measured humidity climbs past the setting, the control closes its output and ON blinks on the screen. Installation runs a field-supplied 4-wire cable of 18 to 22 gauge back to the dehumidifier. Mounting screws and anchors come in the box, and you drill a 3/4 in wire access hole behind the back plate. Mount it on an interior wall, near canopy height, and at least 18 in from an outside wall. A built-in offset of -5% to +5% RH brings the reading in line with your other room sensors. Fault codes from the dehumidifier also appear on this screen.

A Grow Room Humidity Controller That Needs a Good Location

Where you put it decides how well it works. Keep it out of the flow of a supply register, because conditioned air will fool the sensor into short cycling. Avoid corners, spots behind doors and other dead air, which read slow and high. Lighting fixtures and anything else that gives off heat will skew it the other way. A wall with concealed pipes or ductwork is also on the manufacturer's list of places to skip. The control has a low limit and a high limit that shut dehumidification off outside its safe operating window. Those limits mean a very cold or very dry room will stop calling. Let it sit in the room and acclimate before you apply any offset. Hardwiring takes more labor than a plug-in humidistat, and a long cable run through finished walls is real work. In return you get a reading from the spot that counts and no trips to the machine for routine changes. It also saves you from climbing a ladder just to read a diagnostic code.

Key Features

• Onboard RH sensor: The control measures humidity where it is mounted, so canopy-height placement gives a room-level reading.
• Large digital display: Measured RH shows in big numerals, which speeds a walk-through check.
• Up and down setpoint buttons: Setpoint changes take a few presses, and the screen returns to the live reading after 5 seconds.
• Calibration offset: You can match the reading to a trusted room sensor without replacing anything.
• Dehumidifier fault codes: Diagnostic codes appear at the wall, which saves pulling a ladder to check the unit.
• Hardwired 4-wire connection: A wired run avoids any dependence on a wireless link in a metal-heavy room.
• Five-year limited warranty: The manufacturer warranty covers defective parts, not the labor to change them.

Technical Specifications