Seattle, WA / 772,000 SF
The project consists of three quarters of a city block, located at 5th & Union, and will redefine the remaining block around the existing Rainier Tower building. When completed, the 58-story tower will become the second tallest tower in downtown Seattle, trailing only the Columbia Center’s 76 floors. Rainier Square will include over 1.2 million SF of construction, including 40 stories of shell and core office space, with 18 floors of residential apartments on top. The mechanical systems will include a 3,000-ton central boiler and cooling plant, heat exchangers and pumping stations, floor mounted water-cooled heat pumps, and vertical stack fan coil units for the high-end apartment units on top. The hotel will include heat recovery chillers, boilers and domestic hot water heaters, horizontal fan coil units and heat pump units serving lobby and common spaces. In addition to domestic plumbing systems, MacMiller will help install a state-of-the-art Building Management System to help monitor and control the energy usage throughout the complex. The project began underground plumbing work in May of this year and is scheduled for completion sometime in 2020.