Key Benefits: Complete Component Refresh: Contains all essential seals

always verify the specific UL 555S rating required for your project

and they are interchangeable in all documented Lennox technical manuals

while 49K0301 is the updated catalog iteration of the same valve

1" water column (wc)

Nordyne 493214R Heat Exchanger R-410A Key Benefits: Complete Component Refresh:The Nordyne 493214R Heat Exchanger is an OEM primary heat exchanger engineered specifically for Nordyne gas furnaces and M1MB series indoor units. Designed to meet exact factory tolerances, this aluminized steel heat exchanger ensures efficient thermal transfer while maintaining structural integrity under high cycle stress. As a direct HVAC replacement part, it addresses common failure points such as stress fractures or combustion byproduct buildup