LEED at Annex on 12th
Annex on 12th is proud to LEED certified. The property is in the central part of Washington, DC and consists of both reuse of an existing office building and new construction areas. It's located one block from the Smithsonian complex of museums as well as a Metro Rail Station and numerous other community services. Sustainable design features are described below.
LOCATION AND TRANSPORTATION
* Electric vehicle charging stations serving 7 parking spaces are provided.
* The site is in a transit-oriented location close to the Smithsonian Metro Station. In, addition being in a densely developed urban area, adjacent to the National Mall, provides ample opportunity for walking, bicycling, and other non-vehicular transportation.
SUSTAINABLE SITES
* Parking is provided in an underground garage which helps to reduce the heat island effect.
* The project has green roof and ground level landscaping that provides open space area with a diversity of vegetation types and species. Green roof and vegetated areas total 24,935 sf.
WATER EFFICIENCY
* Low flow water fixtures installed in the building result in 36% water savings compared to the LEED baseline. Plumbing fixture flow rates are below:
* Lavatory Faucets – 1 gallon per minute
* Dual Flush Toilets – 1.28/0.93 gpf
* Showers – 1.75 gallons per minute
* Kitchen Faucets – 1.5 gallon per minute
* The landscape design results in 96% water savings compared to the LEED baseline. The landscape design saves approximately 67,963 gallons of water per year.
ENERGY & ATMOSPHERE
* The project has been designed to meet and exceed ASHRAE 90.1-2010 energy standards. A whole building energy model was developed to determine the building’s energy performance and savings. The projected energy savings are 23% in energy cost compared to the ASHRAE 90.1-2010 baseline. Savings come from the following measures:
* High efficiency lighting in the garage and common areas
* Lighting occupancy sensors in common areas including in corridors and stairwells
* Efficient variable refrigerant flow (VRF) heat pumps in apartments and common areas
* High efficiency central water heaters
MATERIALS & RESOURCES
* The building has sourced materials with environmental product declarations that detail the product’s life cycle environmental impact. At least 20 products used in the building have EPDs.
* The property reused an existing office building for a portion of the building.
* The building recycled construction waste throughout construction. The waste management plan resulted in over 75% of waste being diverted from disposal.
INDOOR ENVIRONMENTAL QUALITY
* Construction IAQ management was conducted to protect ductwork and HVAC systems from construction debris and contaminants generated during construction.
* Another measure to improve indoor air quality was use of low VOC paints, adhesives, sealants and flooring. These permanently installed finishes were low VOC materials per LEED standards.