Lennox 25G74 – Honeywell Spring Return Actuator, 24 VAC/DC, Modulating, 2–10 VDC Control Signal

 

This Lennox 25G74 actuator is an OEM Honeywell spring-return damper actuator designed for precise airflow and equipment control in HVAC systems. It delivers reliable modulating performance using a 2–10 VDC control signal and operates on both 24 VAC and 24 VDC power, making it suitable for a wide range of commercial and residential applications. The spring-return function ensures the damper automatically drives to a safe position during power loss, helping maintain system protection and proper ventilation.

Engineered for Lennox systems, this actuator provides accurate positioning, smooth modulation, and strong torque output required for demanding HVAC environments. Honeywell’s durable construction and high-quality internal gearing provide long service life and consistent performance even under continuous duty cycles. Commonly used on air handlers, ventilation dampers, zone systems, economizers, and other components requiring precise modulating control.

 

Key Features

 

• OEM Lennox 25G74 replacement
• Honeywell spring-return design for fail-safe operation
• Operates on 24 VAC or 24 VDC power
• Modulating actuator with 2–10 VDC control signal
• Smooth and precise airflow/damper modulation
• Suitable for economizers, zone dampers, and air handler control
• Built for high reliability in continuous HVAC operation

 

Typical Applications

 

• Residential and commercial HVAC systems
• Air handler damper control
• Economizer and ventilation systems
• Zone control and variable airflow applications
• System retrofits requiring OEM Lennox compatibility