Field Controls

Field Controls is a manufacturer of combustion controls, draft regulation devices, ventilation systems, and indoor air quality products. Founded in 1927 by Ted Field in Evanston, Illinois (relocated to Kinston, NC in 1977), Field Controls invented the barometric draft control and is the world's leading supplier of draft controls, draft regulators, and vent dampers. The company serves 6,000+ US wholesale distributors and HVAC equipment OEMs.

Product Lines

• Barometric Draft Controls: RC type (single-acting, oil/wood/coal); MG-1 type (double-acting, gas). Heavy-gauge galvanized steel, counterbalanced weighted door, draft range 0.02-0.08" W.C. (gas), up to 700°F continuous.
• GVD Automatic Vent Damper: Closes flue during burner off cycle to prevent heat loss and cold air infiltration; opens automatically during burner operation
• Combustion Air Systems: Field Air Boot (direct combustion air to oil burner); Fan in a Can (fresh air to gas furnace room on demand)
• Indoor Air Quality: UV germicidal irradiation, PCO (photocatalytic oxidation), and high-efficiency filtration products (since mid-1990s)
• Ventilation products for residential appliances
• OEM combustion components for HVAC equipment manufacturers
• Water treatment products

Why Contractors Specify Field Controls

• Nearly 100 years manufacturing barometric draft controls since their invention in 1927
• Stable flue draft prevents overfiring (excess draft) and incomplete combustion (insufficient draft)
• GVD vent damper saves energy by blocking flue opening during off cycle
• Combustion air products address code requirements for dedicated combustion air in tight construction
• World's leading supplier of draft controls and vent dampers per Field Controls

How to Choose Field Controls Products

Draft control: RC single-acting for oil/wood/coal; MG-1 double-acting for gas. Match collar size to flue pipe diameter; set counterweight to required draft. Vent damper: GVD in flue pipe diameter to match vent connector; confirm power supply for motor operator. Combustion air: Field Air Boot for oil burner; Fan in a Can for gas furnace room in tight construction.

Frequently Asked Questions

• Founded? 1927 by Ted Field in Evanston, IL; relocated to Kinston, NC in 1977.
• What is a barometric draft control? A weighted hinged-door device in the flue pipe that opens automatically when draft is too high, admitting room air to reduce draft to the desired level.
• Single-acting vs. double-acting? Single-acting (RC): swings one way; for oil and solid fuel. Double-acting (MG-1): swings both ways; for gas appliances.
• GVD vent damper? Automatically closes the flue during burner off cycle to prevent heated house air from escaping up the chimney between firing cycles.
• IAQ products? Yes. UV, PCO, and filtration air purification products since the mid-1990s.