Due to the historic landmark’s designation, the existing building envelope could not be altered, thus creating difficulty in meeting current energy codes and indoor air quality standards. McKinstry’s design build team developed an innovative ventilation system that did both, plus saves the customer money in operational costs. The converted 16-story, 260,000 square foot hospital - now office building was outfitted with 32 individual floor-by-floor chilled water air handling units, fed by a rooftop cooling tower combined with (2) liquid cooled chillers. Fresh outside air is supplied to the interior through vertical duct shafts by 3 rooftop centrifugal fans and the stale, exhaust/relief air back out by 3 additional adjacent duct shafts and fans.

Start up and commissioning of the first two phases was quite a challenge. Amazon.com chose to move into Phase 1 floors 6 - 10 before the entire building construction and automation system was complete. The basement and ground floor tenant, PacMed never left the building, so all their mechanical services had to be kept alive.

A completely redundant main frame computer room air conditioning system had to be fit amongst all the other construction and an extensive temperature controls and alarms interface system had to tie them all together. Some of the mechanical spaces were so tight due to the 1930's methods of building construction, that mechanical equipment had to be wrapped around columns.

Amazon.com
Seattle, WA