Nutone dd500w Digital Dehumidistat

Product Description

The NUTONE dd500w is a digital dehumidistat designed to monitor and control relative humidity levels in HVAC systems. It signals dehumidification equipment to cycle on or off based on a set humidity threshold, helping maintain consistent indoor air quality without manual adjustment. The dd500w uses a digital sensing element rather than a mechanical humidistat, which provides more accurate and repeatable humidity control. Licensed HVAC technicians typically install this control as part of a residential or light-commercial ventilation or dehumidification circuit.

The dd500w is suited for residential and light-commercial HVAC applications where automatic humidity management is required. It is commonly installed in conjunction with whole-home dehumidifiers, ventilating fans, or air handling units that require a dedicated humidistat control signal. The unit fits into standard low-voltage control wiring schemes typical of HVAC installations.

Key Features

• Digital humidity sensing for accurate, repeatable setpoint control
• Controls dehumidification equipment automatically based on relative humidity
• Designed for low-voltage HVAC control circuits
• Replaces mechanical humidistat controls in retrofit and new-construction applications

Compatibility

Designed as an OEM-style replacement or upgrade dehumidistat for residential and light-commercial HVAC dehumidification and ventilation control applications.

Installation Notes

Installation should be performed by a licensed HVAC technician in accordance with applicable local codes and the NEC. De-energize all associated equipment and verify power is off before making any wiring connections. Mount the dehumidistat in a location with representative air circulation, away from direct airflow, heat sources, or exterior walls that could skew humidity readings. Consult the manufacturer installation sheet for wiring terminal designations before connecting control wiring.

Technical Specifications

• Control Type: Digital Dehumidistat
• UPC: 026715260621

Standard Information

• Brand: NUTONE
• Manufacturer Part Number: dd500w