iO HVAC Controls
iO HVAC Controls D-Series Two-Position Round Dampers
Best reliable damper for homeowners upgrading their HVAC zoning systems.
Enhance your HVAC zoning with the iO HVAC Controls D-Series Two-Position Round Dampers. Crafted from durable galvanized steel, these dampers are shipped complete and ready for immediate installation in any appropriately sized duct. They feature a quiet 24-volt spring return actuator for reliable two-position operation and are compatible with most control panels. Designed for ventilation systems operating below 1.0" WC, these dampers offer efficient and straightforward zone control, ensuring optimal comfort and performance in your home.
$129.24
Owner Satisfaction
4.6
/ 5
Category Rank
89
/ 675
#89 in Furnace & Boiler Accessories
Price vs Category Average
-35%
Below average
Material
Galvanized steel
/ Galvanized steel
Who it's for
- Installers seeking straightforward zoning system integration
- Homeowners prioritizing long-term HVAC system reliability
- Contractors working with standard residential duct sizes
Who should skip it
- Engineers requiring precise, variable airflow modulation
- Technicians managing systems prone to high static pressure
- Installers working in cramped, space-restricted duct environments
Performance breakdown
Build Durability
18-gauge galvanized steel provides a robust, long-lasting shell for ductwork.
Installation Versatility
Flexible mounting options allow for seamless integration in any duct position.
System Compatibility
Universal 24V design ensures reliable operation with most standard control panels.
Operational Noise
Quiet actuator motor keeps home comfort zones peaceful and undisturbed.
Adjustment Simplicity
Straightforward minimum position settings make balancing airflow quick and intuitive.
Pressure Efficiency
Optimized for standard residential systems operating below 1.0 inch WC.
Key Specs
Material
Galvanized steel
Construction
18-gauge steel spiral shell
Motor
24 Volt synchronous
Operation
Two-position, Powered Closed/Spring Closed
Max Static Pressure
1.0" WC
Voltage
24V
Power Source
Electric
Features
- Durable galvanized steel construction
- Includes 24V spring return actuator
- Two-position operation
- Quiet and efficient performance
- Simple minimum position adjustment
- Compatible with most control panels
- Ready for installation
- Flexible installation in any position
What customers say
Customers consistently praise the iO HVAC Controls D-Series Dampers for their exceptional quality and reliability. Reviewers, including HVAC professionals, highlight the robust construction and durable metal housing, indicating a long operational life. Installation is frequently described as straightforward, making them a dependable replacement for older units. These dampers operate quietly and effectively maintain their two-position state, resolving temperature imbalances and providing precise airflow control. While the initial cost may be higher than budget options, users agree the superior build and dependable performance offer excellent long-term value and satisfaction, minimizing maintenance needs. The D-Series is recognized as a top choice for serious zoning applications.
Know before you buy
The D-Series dampers are designed to be compatible with most standard HVAC zone control panels that provide a 24-volt output.
Yes, these dampers are designed for flexible installation and can be mounted in any position—horizontal or vertical—to suit your ductwork layout.
Two-position operation means the damper is either fully open or fully closed. It uses a 24-volt spring return actuator to switch between these two states based on the signal from your zone control panel.
No, these are intended for residential or light commercial ventilation systems operating at or below 1.0" WC (water column) of static pressure.
Yes, the unit ships complete with the 18-gauge galvanized steel shell and the 24V actuator, making it ready for immediate installation into your existing ductwork.
Yes, the damper features a simple minimum position adjustment, which allows you to set a specific bypass amount even when the damper is in the closed position.
Still have a question?
Ask Hayley anything about this product before you decide.
Ready to buy?
$129