Hydrotherm BM-3336 Insulated Base Door the high-acid 48-DA core is

the high-acid 48-DA core is typically recommended

The die-cut design facilitates a precise fit on mating surfaces

Precision Air Regulation: Restores factory-calibrated bleed rates to ensure linear signal response across the entire branch pressure range

and D7CG rooftop units and furnace assemblies

Built to withstand the thermal stress of heavy-duty industrial and commercial use

Hydrotherm BM-3336 Insulated Base Door the high-acid 48-DA core isThe Hydrotherm BM 3336 Insulated Base Door is a critical OEM replacement part engineered for high performance thermal containment in Hydrotherm R Series boilers. Designed to fit Model R gas furnaces, including the R 180C, R 210C, R 250C, and R 300B, this insulated boiler door features a steel frame and high density foam insulation to mitigate heat loss at the unit's base. Implementing a Hydrotherm BM 3336 ensures energy efficiency by maintaining