Growlink HvacLINK Drops Into Any 24VAC Grow Room Thermostat Wiring
The HvacLINK is a smart thermostat for indoor grow rooms. Power lands on the R and C terminals at 24VAC. Six relay outputs handle compressor, fan, and HVAC staging. An RJ-45 port ties the unit back to the Growlink HUB. The thermostat slots in where a standard low-voltage thermostat used to sit, so a swap takes minutes rather than a rewire. Day and night temperature setpoints handle the room differently between lights-on and lights-off without a separate timer.
Smart Thermostat Built for High-Humidity Climate Control
The unit operates between 32-140°F with humidity up to 80% RH non-condensing. That's enough headroom for veg, bloom, and the dehumidifier load that sits behind both. Climate control runs from the Growlink portal, so setpoints, alarms, and runtime logs flow into the same dashboard as the lights and the feed line. Multiple units register against one Growlink account, which keeps the climate stack tidy in multi-room facilities. HVAC scheduling talks to lighting and irrigation instead of running on its own clock.
Key Features
- 24VAC Low-Voltage Power: Drops in where a standard low-voltage thermostat used to be wired, with R and C terminals on the input block.
- Six Relay Outputs: Drive compressor, fan, and HVAC staging triggers from one terminal block of relays.
- RJ-45 Link to Growlink HUB: Reports back to the Growlink HUB so HVAC runtime data lives next to lighting and irrigation logs.
- Day and Night Setpoints: Hold separate temperature targets for lights-on and lights-off without an external timer or schedule.
- 32-140°F / 0-80% RH Operating Range: Rated for the humidity loads typical of veg, bloom, and a steady dehumidifier presence.
Technical Specifications
| Specification | Value |
|---|---|
| Power Input | 24VAC (R & C terminals) |
| Network | RJ-45 port to Growlink HUB |
| Relay Outputs | 6 (terminal block) |
| Operating Temperature | 32-140°F |
| Operating Humidity | 0-80% RH (non-condensing) |
| Mount Compatibility | Standard low-voltage thermostat footprint |
| Setpoint Modes | Independent day and night temperature setpoints |
| Platform Integration | Growlink LINKS, Growlink portal, cloud logging |