HVAC Install at the Yeon BuildingBAC Install at the YEON building
Project Name:
 Yeon Building

Location: 522 SW 5th, Portland OR

Owner: Jonathan Rose Companies

Architect: SERA

General Contractor: Andersen Construction Company


At 123,000 sq ft and 15 stories, the Yeon Building was the tallest building in Portland when it was constructed in 1911 and has been listed as a National Historic Place since 1994. In 1970, Hunter-Davisson installed a then state-of-the-art air conditioning system, which served the Yeon Building for over 40 years. This recent project involved a complete mechanical system replacement and upgrades to modernize the Yeon and make it competitive in Portland’s “Class A Historic” office market again. Hunter-Davisson looks forward to another 40 years of providing valued services to this building.


  • Designed and installed a complete mechanical system upgrade to the building including replacing all of the major mechanical components.
  • New cooling tower and high-efficiency boilers and condenser water pumps were increased in capacity to include the first 3 floors.
  • Entire mechanical system was upgraded with a state-of-the-art Honeywell DDC Building Management System.
  • A complex weekend crane lift shutting down two blocks resulted in the replacement of the Cooling Tower, 2 Boilers, Circulating Pumps, and the additional of an Emergency Generator.
  • The new circulating pumps were up in 3 days, followed by the completion of the cooling towers and boilers, resulting in only minor disruptions to the tenants.

YEON building during HVAC install    man working on hvac installation

working crew during hvac installation
crane lift hvac during installation at yeon building
crane lowering bac during installation
closure of street during BAC installation