the SEC99AA-36 and SEC99AA-36C are identical in length

This is an impedance-protected Class 2 transformer designed to limit output current

Operational Efficiency: Eliminates pressure drops and slow response times caused by worn internal valve components

replacing the internal diaphragm and valve seat assembly is a standard protocol for maintaining thermal stability

Carrier 334357-754 Heat Exchanger 318973-401 the SEC99AA-36 and SEC99AA-36C areThe Carrier 334357 754 Secondary Heat Exchanger is a critical OEM condensing component designed for high efficiency gas furnaces across the Carrier, Bryant, and Payne product lines. This secondary coil is engineered to extract latent heat from combustion gases, maximizing thermal efficiency before exhaust. Technical specifications confirm a width of 24. 5 inches, a depth of 25 inches, and a height of 12. 5 inches. As a genuine Carrier replacement