The Field Controls 01437001, Model 8"M, is a precision-engineered barometric draft control designed for oil, wood, or coal-fired heating systems using an 8-inch flue. As a professional-grade draft regulator, it stabilizes the negative pressure within the venting system, ensuring a consistent overfire draft despite fluctuations in outdoor temperature or wind velocity. This unit is field-adjustable to maintain settings between .01" WC to .1" WC, which is critical for preventing excessive heat loss and optimizing combustion efficiency in solid fuel and oil applications. Constructed with high-grade materials to withstand the corrosive environments typical of coal and heavy oil flue gases, the 8"M features a sensitive, calibrated gate that reacts to minute changes in pressure. Proper installation of this chimney draft regulator reduces soot buildup and prevents high-limit trips by maintaining steady airflow through the combustion chamber, directly extending the service life of the heat exchanger and burner components. Key Performance Benefits Precise Draft Regulation: Fully adjustable range from .01" to .1" water column for exact system balancing. Versatile Fuel Compatibility: Engineered specifically for the high-temperature and variable draft requirements of oil, wood, and coal units. Enhanced Efficiency: Minimizes fuel consumption by preventing excessive localized drafts that pull heat out of the stack too quickly. Durable Construction: Built to endure the thermal stresses and corrosive byproducts of solid fuel combustion. Simple Calibration: Features a clear adjustment mechanism for rapid setup during commissioning or seasonal maintenance. Common Contractor Questions How do I set the correct draft for a coal-fired application? Using a calibrated manometer, adjust the weight on the Field Controls 8"M gate until the draft measurement at the breech matches the manufacturer’s specification, typically aiming for a stable overfire draft that prevents puff-backs while ensuring sufficient oxygen for combustion. Can this unit be installed in any orientation? No, for the gate to swing accurately based on the calibrated weights, the barometric control must be installed perfectly level and plumb. It is suitable for vertical, horizontal, or inclined flues, provided the hinge pins remain horizontal. What happens if the draft control is sized incorrectly for the flue? An undersized regulator will fail to bypass enough air to stabilize the system during high-wind events, leading to erratic burner performance and potential overheating of the heat exchanger. Always match the control size to the chimney connector diameter. Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.
