High Performing Buildings - Fall 2011 - (Page 22)

e n e r G y at a G L a n c e Annual energy use intensity (site) 101 kBtu/ft2 natural gas 45 kBtu/ft2 electricity 54 kBtu/ft2 renewable energy 2.5 kBtu/ft2 (approximate) Annual source energy 227 kBtu/ft2 Annual net energy use intensity 99 kBtu/ft2 savings vs. standard 90.1-1999 design Building 40.7% Heating degree days 4,782 Cooling degree days 1,413 Lighting Daylighting is an integral part of the design. In general, the offices are concentrated on the second floor. Their windows are glazed with vision glass to 8 ft above the floor, and daylight glass above that. Lightshelves are mounted between these upper and lower lites, shading the vision glass and redirecting that daylight through the clerestory, deep into the interior. Sensors turn on the lights only when spaces are occupied and insufficient daylight is available to serve them. The main lobby, located on the south side of the building, faces the street. Its south wall is heavily glazed, allowing daylight to flood the space. Interior windows in its north wall and glass block in its floor allow this daylight to be shared with the adjacent courtroom and with the fitness center below. Daylight from the lobby above filters through its glass block floor into the fitness center below. Windows into the surrounding corridors help distribute daylight even further. W at e r at a G L a n c e Annual Water use 380,000 gallons BuiLdinG enveLope roof Type membrane roofing over high-performance insulation and slate roofing over high-performance insulation overall r-value 30 reflectivity of slate 20% Walls Type 4 in. masonry veneer over 8 in. engineered steel studs overall r-value 21 glazing percentage 30% Basement Basement wall insulation r-value 10 (2 in. of extruded polystyrene) Windows u-value 0.27 to 0.29 solar Heat gain Coefficient (sHgC) 0.24 for vision glass and 0.38 for daylight glass Visual Transmittance 47% for vision glass and 70% for daylight glass Location latitude 40°, 43’ orientation front elevation of building faces south david glasofer 22 HigH Performing Buildings fa l l 2 0 1 1

Table of Contents for the Digital Edition of High Performing Buildings - Fall 2011

High Performing Buildings - Fall 2011
Commentary
Contents
Manitoba Hydro Place
Maplewood Police and Court Building
Omega Center for Sustainable Living
Dockside Synergy at Dockside Green
Golden Hill Office Center
Letters to the Editor
Products
Advertisers Index

High Performing Buildings - Fall 2011