Honeywell Round Automatic TrueZone Damper
Product Highlights
14"
Round
24v
Galvanized Steel
Description
Honeywell Automatic Round Damper power-close, spring-open models ensure low leakage while controlling circulating air in heating, cooling and ventilation systems.
- Features galvanized steel with single-blade damper, which closes off tightly against gasket for minimal leakage
- Designated as power closed/spring return open damper for use with Honeywell Zoning Systems
- Can be field-converted when used as an independent zone or for fresh air intake
- Rated to operate up to 1-inch wc
- Available in 5- to 10-inch, 12-, 14-, 16-, and 18-inch diameter sizes
Specs
| Size: |
14" |
|---|---|
| Material: |
Galvanized Steel |
| Application: |
Air Quality |
| Voltage: |
24v |
| Motor: |
Reversible Power Closed Spring Open |
| Motor Mount: |
Top Side |
| Motor Timing: |
30 Seconds Power Closed 10 seconds Spring Return |
| Shape: |
Round |
| Wires to Motor: |
2 |
Understanding Zone Dampers: The Building Blocks of a Zoned HVAC System
What a Zone Damper Actually Does
In a zoned HVAC system, your home is divided into separate comfort areas — for example, upstairs bedrooms, the main living level, and a finished basement — each with its own thermostat. A zone damper is the mechanical component installed inside the ductwork of each zone that opens or closes to control how much conditioned air reaches that area. Without dampers, a zoning system has no way to actually direct airflow; the control panel and thermostats simply tell each damper when to open and close.
This particular damper is a round, power-close/spring-open model, meaning it uses electrical power to close and mechanically springs back open — a fail-safe design that defaults to an open position if power is lost, helping prevent dangerous duct pressure buildup.
Why "Power Closed / Spring Open" Matters
- Safety by design — if power to the damper is interrupted, it automatically springs open rather than staying closed, which helps protect your HVAC system from excess static pressure and potential equipment damage
- Reliable operation — the reversible motor drives closure over 30 seconds, and spring return opens it in about 10 seconds, giving smooth, controlled transitions rather than abrupt airflow changes
- Tight sealing — the single-blade design closes firmly against a gasket, minimizing air leakage into zones that should be inactive, which keeps your zoning system efficient
Sizing and Compatibility
This damper is available in a wide range of diameters — 5" through 10", plus 12", 14", 16", and 18" — to match different duct sizes throughout a home. Correct sizing is critical: an undersized damper restricts airflow and increases strain on your HVAC blower, while an oversized one won't seal effectively. Our technicians measure your existing ductwork to select the correct diameter for each zone.
Where It's Used
- New zoning system installations — paired with a control panel such as the Honeywell TRUE Zone HZ311 Panel or an AprilAire zone control panel
- Replacing a failed or worn damper in an existing zoned system
- Independent zone or fresh air intake applications — this model can be field-converted for standalone use outside a full zoning system, offering flexibility beyond typical zoning setups
How Zoning Improves Comfort and Efficiency
Without zone dampers, a single thermostat forces your entire home to the same temperature — even though upstairs bedrooms, sunlit living rooms, and basements all heat and cool at different rates. Adding zone dampers lets each area maintain its own set temperature, which typically means:
- More consistent comfort room-to-room, floor-to-floor
- Reduced energy waste from conditioning unoccupied or already-comfortable spaces
- Less strain on your furnace or AC by avoiding the temptation to overcompensate for problem rooms
Professional Installation Matters
Because this damper integrates directly with your home's ductwork and zoning control panel, correct wiring, mounting orientation (top or side motor mount), and duct sealing all affect long-term performance. Our licensed HVAC technicians will:
- Verify the correct duct diameter for each zone
- Mount the damper with proper motor orientation and wiring (2-wire connection to the zone panel)
- Confirm airflow direction and gasket seal for minimal leakage
- Integrate the damper with your zoning control panel and test power-close/spring-open operation
- Balance airflow across all zones for consistent comfort
Frequently Asked Questions
Can this damper be used without a full zoning system?
Yes — it can be field-converted for independent zone control or fresh air intake applications, though it's most commonly installed as part of a complete Honeywell TrueZone system.
What happens if the power goes out?
The spring-open design means the damper will automatically return to an open position, protecting your ductwork and HVAC equipment from pressure buildup.
How is the right size determined?
Sizing should match your existing round duct diameter — our technicians measure on-site to ensure proper fit and airtight sealing.
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