Description
The Field Controls 46198901 (Model 4″MG1) is a 4-inch double acting barometric draft control engineered specifically for gas-fired heating applications. Designed to automatically regulate flue draft, this control helps maintain consistent combustion efficiency and protects your heating equipment from the damaging effects of excessive draft or backdraft conditions.
How It Works
The double acting design allows the barometric damper to respond to both positive and negative pressure fluctuations in the flue, swinging open in either direction as needed. This self-regulating action stabilizes draft pressure within the flue system, ensuring the burner receives the correct air-to-fuel ratio for safe, efficient combustion.
Key Features
- Double acting barometric draft control — responds to both positive and negative draft conditions
- Adjustable draft range from .01″ w.c. to .1″ w.c. for precise system tuning
- 4-inch flue pipe connection for compatibility with standard residential and light commercial gas appliances
- Designed specifically for gas-fired heating applications
- Helps protect equipment and improve combustion efficiency by stabilizing flue draft
- Model 4″MG1 — a trusted Field Controls design for reliable long-term performance
Specifications
- SKU: 46198901
- Model: 4″MG1
- Pipe Size: 4 inches
- Action Type: Double Acting
- Application: Gas-fired appliances
- Adjustable Draft Range: .01″ w.c. to .1″ w.c.
- Brand: Field Controls
Application
Ideal for use with gas furnaces, boilers, water heaters, and other gas-fired appliances connected to 4-inch flue systems. Proper draft control is essential for safe venting, optimal fuel efficiency, and compliance with appliance manufacturer requirements.







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