Trove is an approximately 417,000 square-foot multi-family apartment building in Arlington, Virginia. The project will offer a range of apartment sizes ranging from studios to three-bedroom units with 401 total units. The site was previously developed as surface parking lots for the neighboring apartment buildings. The building has been designed and built to meet LEED for New Construction v2009 standards.
The project has been designed with a comprehensive stormwater management system that filters runoff at the site. Filtration systems include bioretention areas, permeable paving in the alley and a filtration tank. Filtration systems remove at least 80% of total suspended solids (TSS) from site runoff.
The parking garage has infrastructure for fuel-efficient vehicles. There are 23 preferred parking spaces (closest to entries) reserved for fuel-efficient vehicles as well as 7 electric vehicle charging station spaces located throughout the parking garage.
ENERGY & ATMOSPHERE
The project has been designed to meet and exceed ASHRAE 90.1-2007 energy standards. A whole building energy model was developed to determine the building’s energy performance and savings. The projected energy savings are 20.4% in energy cost compared to the ASHRAE 90.1-2007 baseline. Savings come from the following measures:
- Corridor lighting is 0.11 W/sf which is 80% more efficient than the baseline.
- Garage lighting is also 80% more efficient than the baseline and is controlled by occupancy sensors.
- Packaged rooftop units have energy recovery whereby conditioned exhaust air from the building is used to precondition fresh air supply using a heat exchange wheel.
- ENERGY STAR appliances (refrigerators, dishwashers, clothes washers) are installed in all dwelling units.
- Increased roof insulation (R-25).
- Exterior walls with R-20 batt insulation in a 2×6 wood framed assembly.
- Vinyl windows with a U-factor of 0.32 and 0.28 SHGC.
MATERIALS & RESOURCES
A construction waste management plan was implemented during construction with a goal of diverting material from disposal. Construction waste was diverted from disposal for 91.7% of construction waste. This represents 2,981 tons of construction material that was recycled or reused.
In addition, recycled content materials total over 10% of materials, by cost. Furthermore, regionally sourced materials used during construction consist of over 20% of materials used in the building.
INDOOR ENVIRONMENTAL QUALITY
The project implemented a Construction IAQ Management Plan during construction. Absorptive materials were wrapped to prevent moisture damage, high-efficiency filters were installed, and ductwork was covered to prevent construction debris from entering the HVAC system.
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.
Low flow water fixtures installed in the building save over 36% compared to the LEED baseline. Water savings from efficient fixtures save an estimated 5,831,884 gallons of water per year. Plumbing fixture flow rates are below:
- Lavatory faucets – 1.2 gallons per minute
- Toilets – 1.28 gallons per flush
- Showers – 1.5 gallons per minute
- Kitchen faucets – 1.5 gallons per minute
The landscape design results in additional site water savings due to use of drip irrigation with minimal areas using sprinklers. Water savings from the landscape design are an estimated 122,200 gallons of water per year compared to the LEED baseline.