the Johnson Controls DMPR-RS311 is a critical fire safety component engineered specifically for FD-1300 Series dynamic multi-blade fire dampers

As a direct factory replacement for legacy part numbers 239-43676-02 and 239-43676-02C

the 11952 ensures broad compatibility across major mechanical systems

Simple Installation: Tool-free

Nordyne 661049R Orifice the Johnson Controls DMPR-RS311 isThe Nordyne 661049R Orifice is a precision engineered #49 natural gas burner orifice designed for specific gas furnace manifold assemblies. Featuring a . 049 port size, this component is critical for maintaining the correct BTU input and ensuring stoichiometric combustion within the heat exchanger. As the direct replacement for Nordyne 661049, this part addresses common furnace burner maintenance issues such as clogged gas orifices or improper flame