Department of Social and Health Services
Seattle, WAMacDonald-Miller: Mechanical Engineer and Mechanical Contractor
This older building received a complete office renovation, retrofit of the mechanical system and installation of a control system.
Project Overview
- Systems consist of chilled water fan coil units on the first floor and rooftop package air conditioning units on the second floor.
- Installation of a Richards/ZETA control system completed the project.
King County Office Building
Seattle, WAMacDonald-Miller: Mechanical Engineer and Mechanical Contractor
This 13-story "green" office building includes retail space, below grade parking and a separate 8 story parking garage and required the core build-out comprised of HVAC, plumbing, hydronic piping, controls and commissioning.
Project Overview
- A single chilled water VAV rooftop air conditioning unit with fan wall technology serves all the office levels. Three gas-fired boilers provide hot water heating. Additional 24/7 cooling provided via the building cooling towers, run through a heat exchanger to provide a closed-loop cooling capacity throughout the entire building.
- Plumbing scope for shell and core restrooms include dual flush water closets, low flush urinals and lavatories with electronic faucets. Eight shower stalls and other appurtenances serve a fitness area.
- Because of features like the storm water filtration vault and the 40% domestic water savings, the building has LEED Gold Core/Shell rating.
King Street Center
Seattle, WAMacDonald-Miller: Mechanical Engineer and Mechanical Contractor
This Historical Renovation for King County, the Department of Transportation and the Department of Natural Resources updated the 8-story, 446,261 Sq. Ft. building including two levels of underground parking.
Project Overview
- Two custom Mammoth penthouse units discharge medium temperature air supply to the building's cooling system with cool rooms to exhaust outside.
- Rainwater reclaims system collects rainwater from the roof and under slab drainage. This water is held in three large basins and is pumped into the building to flush water closets and urinals during the wet season thus saving domestic water.
- The King Street Center has received the LEEDŽ Gold EB Rating.
Labor and Industries Building
Tumwater, WAMacDonald-Miller: Mechanical Engineer and Mechanical Contractor
The project is comprised of a six-story offices building, 75 feet high atrium rotunda and cafeteria totally 407,862 Sq. Ft. The HVAC system received the First Place Award in Contracting Business Magazine's Design/Build Comfort and Quality Contest in 1994. In order to protect the environment and preserve natural resources, Washington State has instituted very strict energy use reduction mandates. The criteria for the building required an energy usage projection 30% below Washington State Energy Code Standards.
Project Overview
- The basic HVAC system consisted of a variable volume air handling system with chilled water-cooling and electric fan terminal heating. Nighttime heating, winter ventilation and morning warm-up were accomplished by natural gas boilers connected to the chilled water system.
- The HVAC system featured variable speed chilled water pumping, a closed-loop system for 24-hour air conditioning, computer room loads and a DDC control system.
- The primary design consideration ensured the building would exceed all indoor air quality design standards and do so in an energy efficient manner. Construction materials were specified to minimize air pollutants. Copy rooms were 100% exhausted to the outdoors. Exposed fiberglass materials were minimized or eliminated. Chilled water coils were 100% drainable so that no standing water could occur to promote the growth of algae or fungus.
Northwest Detention Center
Tacoma, WAMacDonald-Miller: Mechanical Engineer and Mechanical Contractor
The five-building complex is comprised of four detention buildings and one building housing the administration offices, courtroom, kitchen, laundry and Healthcare facility totaling 115,000 Sq. Ft.
Project Overview
- The system was comprised of a rooftop unit VAV system for the Administration building.
- Constant volume rooftop units served the detention cells.
- The kitchen and laundry facility were completely institutional grade.
Redmond City Hall
Redmond, WAMacDonald-Miller: Mechanical Engineer and Mechanical Contractor
This new building combined four separate buildings into a 125,000 Sq. Ft. four-story structure.
Project Overview
- The building was designed to reflect the beauty of the northwest by using a mix of limestone and granite on the exterior and transparent walls, reflecting pools and a large atrium on the inside.
- A chilled water VAV unit with hydronic heat was installed.
- The building received LEED Silver Rating.
Tumwater Office Building
Tumwater, WAMacDonald-Miller: Mechanical Engineer and Mechanical Contractor
This four story, 220,000 square feet LEEDŽ certified building is the new home of both the Washington State Department of Corrections and Department of Transportation.
Project Overview
- The HVAC system is comprised of three rooftop chilled water air handlers, one chiller with an ice storage plant, and high efficiency gas boilers with heating coils at the VAV zones and in the rooftop units. The size of the chiller was reduced by the amount of ice produced during off-hours resulting in a lower building electrical load and energy savings.
- The plumbing system is based around dual flush water closets and waterless urinals. A green roof slows the rate of storm water to the site contained a storm water management system.
- The project is a Contracting Business; Design/Build Award winner for 2005 as well as a LEED Gold Rating building. This was due to the building having energy savings over 37%; water consumption reduced by over 44%; and waste water reduced by over 50%.
King County Courthouse
Seattle, WAMacDonald-Miller: Mechanical Engineer and Mechanical Contractor
The Courthouse, located in downtown Seattle, required roof access for a crane for the demolition and installation of two new Evapco cooling towers, necessitating coordination with the City of Seattle, Metro, and Ness Crane.
Project Overview
- Demolition was required for two 1960 vintage 650-ton Carrier Chillers within existing basement chiller room. The only access to the basement is through the one-way tunnel connecting Dilling Way to the Courthouse.
- Installation of two 700-ton York Chillers with re-assembly occurred in the new chiller room along with nine new primary and secondary pumps, including two new 125 hp condenser water pumps.
- The electrical scope of work comprised of new VSD's for all nine pumps and a buss for the future installation of a 365-ton chiller.
- The structural engineering and installation to support the new piping systems incorporated the acoustical design and engineering of the basement and rooftop equipment.
- A new dual speed AHU was installed with both heating/cooling requirements and refrigeration purge mode.
King Street Center
Seattle, WA