Vivosun AeroFlux W70 700W Smart Grow Tent Heater

VPD — Vapor Pressure Deficit — measures the difference between the moisture in the air and how much moisture the air can hold at a given temperature. Keeping VPD in the optimal range for each growth stage directly affects how efficiently your plants transpire, uptake nutrients, and develop. The AeroFlux W70 monitors VPD in real time and adjusts heat output automatically, so your environment stays in the ideal zone without manual intervention.

The AeroFlux W70 is rated to heat tents up to 5×5 ft (1.5×1.5 m). Actual heating performance will vary depending on ambient temperature, insulation quality, and how well-sealed your tent is. In a 5x5 tent, using a Vivosun 8" Duct Air Carbon Filter ensures that your ventilation capacity matches the heating power of the W70.

The included 10 ft (3 m) sensor probe connects to the AeroFlux W70 and can be positioned at canopy level — away from the heater body — to read actual growing conditions rather than the heat radiating off the unit itself. This gives the control system accurate temperature and humidity data, which is critical for reliable VPD calculations and precise auto-adjustment of heat output.

Yes — the AeroFlux W70 includes an onboard display with local controls for power on/off, target temperature setting, and power level adjustment. Local Mode lets you configure everything directly on the unit in seconds without a phone. The VIVOSUN app unlocks advanced features like target VPD setting, minimum temperature thresholds, and the Recipe feature for Day/Night Mode scheduling, but it is not required for basic operation.

The AeroFlux W70 uses a triple-safety system designed for unattended operation in grow environments. V0-rated flame-retardant materials in the housing prevent ignition even under fault conditions. Automatic tip-over shutoff cuts power instantly if the unit is knocked over. Overheat protection monitors internal temperatures and shuts the heater down if they exceed safe limits, protecting both your plants and your equipment. To ensure consistent airflow for both your heater and fans, remember to swap out your VIVOSUN 6" Pre-Filter Cloth for Inline Carbon Filter - Black as needed.

The five power levels let you set a baseline heating intensity suited to your tent size and ambient conditions. PWM (Pulse Width Modulation) precision control then fine-tunes output within that level, cycling the heating element on and off rapidly to deliver exact wattage rather than simply toggling between full power and off. The result is even, steady heat without the temperature spikes common in simpler heaters.

The Recipe feature in the VIVOSUN app lets you program separate temperature and VPD targets for daytime and nighttime periods, automatically shifting the AeroFlux W70's behavior on a schedule. This mirrors natural temperature differentials that many plants benefit from and removes the need for manual adjustments at lights-on and lights-off — particularly useful for year-round grows where ambient temperatures fluctuate significantly between day and night.