321SS contains titanium

This kit is essential for converting cooling-only units or replacing failed heat strips in existing Armstrong HVAC systems while maintaining high efficiency and industrial-grade reliability

while it is commonly used as a low temperature cutout in HVAC coils to prevent freezing (freeze-stat)

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

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

Carrier 334357-754 Heat Exchanger 318973-401 321SS contains titaniumThe 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