A few months back, a Wallyhood reader had commented on the use of single-paned windows versus double-paned for the sake of energy efficiency at Hamilton. I spoke with Michael Romero from Heery (the Hamilton construction manager) and he informed me that due to Landmark Commission guidelines regarding replacement windows, all of the original 1926 windows and panes were left intact, with the exception of those that were broken or cracked. Each window was taken down, tagged, and sent to a window renovation specialist in Ballard, where they were re-sashed and re-weighted, and new pulleys and vinyl weather strips were installed. Any kind of heat loss from these windows equals about 5% of the building’s total heating budget, unlike the original windows in some of the surrounding homes in the neighborhood, which can cause up to 30% in heat loss. Re-use of the existing windows rather than building new double-paned windows to match the landmark windows saves the District roughly $2 million.
Each classroom is individually climate-controlled by a main pressure heating and cooling system. CO2 monitors are also in each class so that if the levels rise, the air connection pumps in fresh air from the outside. This monitoring means that outside air will only have to be heated or cooled when classrooms are in use and the fresh air is needed. Since most of the building’s heating budget is used for warming outside air required to keep air fresh in classrooms filled with students, this type of heating and cooling monitoring will reduce the building’s energy use by up to 20%.
While we’re on the subject of energy, here’s a recap of the construction work in progress:
At the end of January, all four main stairs were put into place, as were all windows in the main building and the addition. Finish work, including final drywall, paint, ceiling tiles, wood trim and ceramic tile, continues on the 3rd and 2nd floor of the historic building. The ADA ramp installation at the corners adjacent to the project is underway and sidewalks are now in place on the south side of the site and underway on the west side. All work on the Seattle City Light transformer was put in place, and the building was ready to have its electrical power turned on. Plaster restoration work began at the 2nd floor of the landmark spaces.
In February, the building’s electrical power was turned on. The contractor completed the rolled metal roofing at the new addition and new gym lobby. Painting of the new gym interior work on the floor coverings. Work will continue on the school/park interface, including the installation of the final stairs and completion of the retaining wall.
Aerial View of Hamilton International Middle School looking south, showing the new gym construction and the renovations of the historic building, taken January 19th, 2009. Aerial photos courtesy of Fred Cavazos, Above the Rest Blimp Photography http://www.atrphoto.com/