Standex 99-116S Energy Recovery Ventilator ERV Dehumidistat Ventilation Control

Standex 99-116S Energy Recovery Ventilator ERV Dehumidistat Ventilation Control is a humidity-sensing accessory designed to regulate ventilation in Standex ERV systems. When indoor humidity exceeds the setpoint, the dehumidistat signals the ERV to increase ventilation or switch to a higher-velocity mode to remove moisture; as humidity returns to the desired range, the system gradually returns to its normal operating cycle. The device is wired to the ERV’s control circuitry to enable automatic humidity-based adjustments, helping to balance comfort with energy recovery. It is suitable for spaces where moisture buildup is a concern, such as bathrooms, laundry rooms, basements, or other high-humidity environments, and it complements standard ERV operation by adding dehumidification control without sacrificing the energy efficiency of the ventilation system. The 99-116S designation identifies this Standex dehumidistat control as the humidity-responsive component used with compatible ERV models.