University of Washington Medical Center
Seattle, WA
MacDonald-Miller: Mechanical Engineer and Mechanical Contractor
This 191,612 sq. ft., eight-level medical office building with a parking garage included the design and construction of plumbing and HVAC for both shell and core, and tenant improvements.
Project Overview
- The medical areas are served by two rooftop VAV systems with constant volume fan terminals. The piping systems include fuel oil piping for an emergency generator.
- Medical gas systems and deionized water systems service the laboratory areas. These spaces are built for minor surgery, MRI facilities, radiology, and anesthesia.
- The parking garage, located on the four sub-levels, are ventilated by seven exhaust fans, with carbon monoxide sensors that are interlocked with the DDC Control System to cycle the fans on/off.
Covington Medical
Covington, WA
MacDonald-Miller: Mechanical Engineer and Mechanical Contractor
This four-story office building is equipped with three surgery suites, as well as day surgery suites, in it’s 80,000 sq. ft. of space.
Project Overview
- A VAV HVAC system serves the building with Mammoth units on the rooftop.
- The 24-hour surgery area is served by a Pace built up air handler, with Carrier condenser, to individual electric duct heaters for each zone. The surgery areas also incorporate the use of humidifiers.
- All systems are monitored by Staefa DDC controls.
Enumclaw Regional Hospital
Enumclaw, WA
MacDonald-Miller: Mechanical Contractor
This 90,000 sq. ft. facility will include an emergency department, diagnostic imaging, three operating rooms, two gastrointestinal rooms, 25 patient beds, two labor, delivery, recovery rooms, a cafeteria, administrative space, and 8,000 sq. ft. for a future build-out for 13 more patient beds. (Pending)
Project Overview
- The systems installed include four fan wall air-handling units and a VAV air distribution system. A Phoenix Theris System controls the room climate and pressurization.
- Two 200-ton air-cooled chillers generate chilled water and three condensing boilers provide heating hot water.
- This will be the first LEED-certified hospital in Washington State.
Providence West Tower
Seattle, WA
MacDonald-Miller: Mechanical Contractor
This project entailed a medical infrastructure retrofit for 59,140 sq. ft. in eight floors.
Project Overview
- Patient rooms were demolished to all room for a new mechanical shaft. The supply duct and exhaust duct risers were installed in the new shaft with ties for future connections.
- New rooftop supply and exhaust air handlers were set up on the rooftop structural frames.
- New chilled water and heating water piping run from the basement mechanical room to the rooftop air handler.
St. Francis Hospital
Federal Way, WA
MacDonald-Miller: Mechanical Contractor
The emergency department received a renovation to 21,915 sq. ft., as well as an addition to include a critical care area totaling 27,871 sq. ft. This expansion will allow the emergency department to handle more then 45,000 patients per year.
Project Overview
- The emergency room received five new examination rooms and an upgraded waiting and reception area.
- The new critical care unit has 30 beds and is located directly above the existing emergency room.
- The central plant was upgraded to handle the additional loads of the new patient rooms. The new systems include medical gas, chilled water, hot water heating, fuel oil, domestic water, sanitary waste and vent, rain leaders, temperature controls, insulation, testing and balancing.
Swedish Ballard Ambulatory Care Center
5350 Tallman – Seattle, WA
MacDonald-Miller: Mechanical Engineer and Mechanical Contractor (project pending)
This 105,000 sq. ft. five-story building includes a new emergency department, medical imaging center, outpatient surgery, primary care, and specialty physician offices. This building will be LEED silver certified upon completion.
Project Overview
- The chilled water rooftop fan wall air-handling units serve the emergency department and diagnostic imaging area.
- The second, third, fourth and fifth levels utilize two 90-ton DX air-handling units for the physician offices.
- Domestic water is provided by central domestic water heaters.
Virginia Mason Ambulatory Surgery Center
Federal Way, WA
MacDonald-Miller: Mechanical Engineer and Mechanical Contractor
This 28,000 sq. ft. renovation enables the center to accommodate up to 9,000 surgeries per year with more efficient surgeries and faster recoveries.
Project Overview
- This design/build fitted the facility with four surgery suites that have support for a day surgery recovery center.
- The heat-recovery ventilation system for the surgery and procedure areas are designed to have 100% outside air featuring exhaust air heat recovery that utilize an air-to-air heat exchanger.
- All the HVAC, plumbing and medical gas services were customized for the renovation.
Virginia Mason Expansion
Seattle, WA
MacDonald-Miller: Mechanical Contractor
The 362,000 sq. ft. addition features a new emergency department, intensive care unit, critical care unit, and acute care.
Project Overview
- The building is equipped for steam and condensate, medical gas, chilled water, hot water heating and condenser water. Its also “boiler ready” for future on site steam generation.
- The project was designed using a 3D Building Information Model process where all team members collaborate in the modeling process to create a seamless coordination process.
Virginia Mason Surgery Retrofit
Seattle, WA
MacDonald-Miller: Mechanical Engineer and Mechanical Contractor
This design/build project retrofitted the HVAC, plumbing, and medical gas systems for 14 surgery rooms.
Project Overview
- HVAC revisions include replacement of all steam re-heat coils and controls, and upgrade of duct and fan systems to ensure code-required airflows.
- Plumbing upgrades entailed replacement of all scrub sinks and galvanized domestic water piping with copper.
- Medical gas revisions included installation of new nitrogen plant and nitrogen control panels, distribution piping of nitrogen and medical air to all surgeries, and fitting of 208 additional medical gas outlets including nitrogen, medical air, oxygen, nitrous oxide, and vacuum.
Virginia Mason Hyperbaric Chamber
Seattle, WA
MacDonald-Miller: Mechanical Engineer and Mechanical Contractor
This new hyperbaric chamber is not only the busiest in the United States; it’s also the second largest. Located in 92,240 sq. ft. of recently built-out space, the chamber is 46 feet long and about the size of a Boeing 737 at its core.
Project Overview
- The chamber, which can accommodate up to 16 patients at once, can be pressurized to simulate conditions of up to 150 feet below sea level to treat illnesses such as decompression sickness, carbon monoxide poisoning, and the adverse affects of radiation.
- Eight chilled water air compressors pressurize the hyperbaric chamber. The compressors feed two 3,800 gallon and 1,100 gallon storage tanks that feed into the chamber. Attached heating and cooling fan coils regulate the temperature of the chamber.
- The piping consists of medical gas, exhaust, fire protection potable water, control air and drain piping.
