Oregon (OR) Residential Water-Heater Installer License (WHI) Oregon’s residential plumbing contractors depend on WHI-certified installers to meet code compliance on every job. Water heater systems—from conventional tanks to tankless and heat pump models—require precise venting, pressure relief configuration, and permit documentation. This license proves you can navigate Oregon’s specific thermal efficiency standards and inspection requirements that protect homeowners from safety hazards.
| Exam Name | Oregon (OR) Residential Water-Heater Installer License |
| Exam Code | WHI |
| Format | PDF & Practice Test Engine |
| Target Year | 2026 Updated |
| Features | 100% Verified Q&As |
