Honeywell mgi-8 Barometric Draft Damper 8 Inch Gas

Product Description

The HONEYWELL mgi-8 is an 8-inch standard barometric draft damper control with a collar, designed for natural gas heating appliances. Barometric draft controls regulate flue draft by allowing dilution air to enter the vent system, maintaining consistent draft pressure across varying atmospheric and stack conditions. This prevents over-drafting, which can cause short cycling, heat loss, and combustion inefficiency. The mgi-8 includes an integrated collar for connection to standard round flue pipe. It is installed by licensed HVAC technicians and heating contractors as part of a vented gas appliance system.

This barometric draft damper is intended for use on natural gas-fired heating equipment vented through conventional B-vent or single-wall metal flue pipe. Typical applications include residential and light commercial gas furnaces, boilers, and water heaters that require passive draft regulation. The 8-inch size fits standard 8-inch round flue pipe collars. It is suited for installations where stable, controlled flue draft is required to meet appliance manufacturer and code requirements.

Key Features

• 8-inch diameter fits standard round flue pipe connections
• Integrated collar simplifies connection to existing vent pipe
• Designed for natural gas appliance venting systems
• Passive barometric operation requires no electrical power
• Regulates flue draft to prevent over-drafting and heat loss

Compatibility

Designed as an OEM-style barometric draft control for natural gas-fired residential and light commercial heating appliances vented with 8-inch round flue pipe.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified heating contractor in accordance with the International Fuel Gas Code (IFGC) and local authority requirements. Shut down and allow the heating appliance and flue system to cool completely before beginning installation. The damper must be mounted in the horizontal flue run between the appliance and the chimney, typically within the first few feet of the appliance flue collar. Verify that the damper swings freely and is plumb after installation before returning the system to service.

Technical Specifications

• Flue Pipe Size: 8 inches
• Fuel Type: Natural Gas
• Type: Standard Barometric Draft Damper Control
• Collar: Included

Standard Information

• Brand: HONEYWELL
• Manufacturer Part Number: mgi-8