Imperial Mfg BM0241 Cast Iron Damper 3 Inches

Product Description

The IMPERIAL MFG GROUP USA INC BM0241 is a 3-inch cast iron barometric damper designed to regulate draft in oil-fired and gas-fired heating systems. Cast iron construction provides durability and resistance to the high-temperature flue gas environment found in boilers, furnaces, and water heaters. The damper works by opening or closing in response to changes in flue pressure, helping maintain consistent combustion efficiency throughout the heating cycle. HVAC technicians and plumbers install this type of damper on the flue pipe between the appliance and the chimney connector.

This damper is suited for residential and light commercial heating applications where draft control on a 3-inch flue is required. It is typically installed on oil-fired boilers, gas boilers, and atmospheric gas furnaces that require barometric draft regulation. The unit of measure is each, and the part is packaged in quantities of 12, making it practical for wholesalers and service shops maintaining stock for repeat installs.

Key Features

• 3-inch nominal size fits standard 3-inch flue pipe connections
• Cast iron construction withstands continuous high-temperature flue gas exposure
• Barometric design automatically responds to flue pressure changes to stabilize draft
• Sold individually; available in case quantity of 12 for stocking purposes

Compatibility

Designed as an OEM-style replacement or new-installation barometric damper for residential and light commercial heating appliances equipped with 3-inch flue connections.

Installation Notes

Installation should be performed by a licensed HVAC technician or qualified service professional. Shut down the heating appliance and allow the flue system to cool completely before beginning work. The damper must be installed per the appliance manufacturer instructions and applicable codes including the International Fuel Gas Code (IFGC). Proper draft adjustment after installation is critical to safe and efficient appliance operation.