Skip to main content

Oregon State Flag An official website of the State of Oregon »

Mechanical Code Program

Adopted codes and standards

The Oregon Mechanical Building Code (OMSC) establishes the minimum requirements for the design, installation, alteration, and inspection of mechanical systems that are permanently installed and utilized to provide control of environmental conditions and related processes within buildings.

2022 Oregon Mechanical Specialty Code (OMSC)

Effective: Oct. 1, 2022 with a *6-month phase-in period
Mandatory: April 1, 2023

*During the phase-in period, use of the 2019 OMSC or the 2022 OMSC is permitted.

The 2022 OMSC is based on the 2021 International Mechanical Code (IMC). The fuel gas provisions of Appendix C are based on the 2021 International Fuel Gas Code (IFGC).

Code update training

Learn more about...