How do I confirm if this heat exchanger fits my specific furnace model

Before replacement

While the mechanical fit may be identical

Industrial Build: Rugged black molded ABS construction provides superior durability and corrosion resistance compared to standard utility gauges

Itron-Actaris B31R-1 Regulator 340155-7026 How do I confirm ifThe Itron Actaris B31R 1 Regulator is a robust industrial grade infrastructure component engineered for high precision gas pressure regulation in commercial and light industrial applications. This specific configuration features a 1 inch Internal Relief Valve (IRV) and a 1 2 inch orifice, making it ideal for systems with sudden on off loads that typically cause shock problems in lesser hardware. Utilizing a high tensile cast iron valve body and a 4 9"