Research Products 6508 Motorized Damper 8 Inch Round 24V

Product Description

The RESEARCH PRODUCTS 6508 is a motorized zone damper designed for round ductwork measuring 8 inches in diameter. It operates on 24 volts AC at 60 Hz and draws 6 watts with a 10 VA rating. The motor is configured normally open and power closed, meaning the blade defaults to the open position when de-energized and closes when power is applied. This design is standard in residential and light commercial zoning systems where a power failure should default to airflow rather than restriction. Licensed HVAC technicians install this damper as part of zone control systems tied to a zone control board and low-voltage thermostat wiring.

The 6508 fits into round duct runs where individual zone control is required. Typical applications include multi-zone forced-air heating and cooling systems in residential construction, where separate thermostats control airflow to distinct areas of a building. The round form factor suits branch duct installations coming off a plenum or trunk line. This damper is well suited for retrofit zoning projects as well as new construction duct layouts where zone isolation is engineered into the system design from the start.

Key Features

• 8-inch round duct size for standard branch and trunk duct installations
• 24-volt AC operation at 60 Hz integrates with standard low-voltage zone control systems
• Normally open, power closed motor defaults to open position on power loss
• 6-watt power draw with 10 VA rating keeps transformer load minimal in multi-damper systems
• Round configuration simplifies installation in branch duct runs without adapters

Compatibility

Designed as an OEM-style motorized damper for use in residential and light commercial forced-air zoning systems requiring an 8-inch round normally open, power closed damper at 24 volts AC.

Installation Notes

Installation should be performed by a licensed HVAC technician familiar with low-voltage zone control wiring and duct fabrication. Shut off power to the air handler and zone control board before making any electrical connections. Secure the damper body to the duct using sheet metal screws and seal joints with foil tape or mastic per applicable mechanical codes. Verify transformer VA capacity before adding this damper to an existing zone control system to avoid overloading the transformer.

Technical Specifications

• Size: 8 inches
• Shape: Round
• Voltage Rating: 24 volts AC
• Frequency Rating: 60 Hz
• Power Rating: 6 watts
• VA Rating: 10 VA
• Motor Type: Normally Open, Power Closed

Standard Information

• Brand: RESEARCH PRODUCTS
• Manufacturer Part Number: 6508