LEED v4 is the latest, and most environmentally-aggressive set of green building standards to be created by the U.S. Green Building Council. As Inhabitat reported previously, LEED v4 took a strong stance against chemical-based building materials, including some vinyls and plastics. Some claimed that the standards were just too strict, but the world's first LEED v4 certified project proves that it's still possible to create beautiful, functional spaces under the new rules. Haworth's Showroom inside the Parkview Green (a massive LEED Platinum pyramid made of glass) has been recognized as the first successful project completed under the LEED version 4 beta program. The furniture and office space designer was awarded LEED Gold status after the showroom project earned 71 out of the possible 110 points.
The Parkview Green itself is already a marvel of sustainable architecture: The 800,000 sq ft mixed-use development features a glass and ETFE envelope that minimizes heating and cooling demands all year long. When heat or air conditioning is required, energy is supplied by a geothermal system. The development also collects rainwater from the roof and paved areas, which is then filtered and recycled for use as irrigation water.
Inside the building, Haworth’s showroom reveals even more green surprises. “Inside Parkview Green, Haworth has created the Club, a workspace concept that offers coworking and lounge spaces that can be used by the building’s tenants, hotel guests and members in the community. Everything from partition walls, meeting rooms, huddle spaces and private focus areas can be rearranged to meet the day-to-day needs of its users,” reports Environmental Leader. This flexible-use design saves money and time, and reduces waste.
In building the showroom, 60 percent of nonstructural interior elements were reused. All interior paints, adhesives and sealants meet the strictest chemical content and VOC limits, so air quality inside the showroom exceeds the indoor environmental air quality requirements by 35 percent.
To reduce energy consumption, the designers installed variable air volume (VAV) air diffusers under the floors. These diffusers work in conjunction with cold radiation ceilings to provide individual controls for the temperature of each solar exposure and interior space. An optimized HVAC system and LED lighting design, fixtures and controls supplied by Philips, further reduced energy consumption by 59 percent (compared to ASHRAE energy requirements).
A greywater recycling system and efficient faucets and toilets reduces water consumption by 53 percent. And just for good measure, 93 percent of the furniture in the space is either Greenguard certified or was repurposed from an existing showroom. Haworth also purchased renewable energy credits equivalent to five years of the showroom’s energy use, a practice that’s duplicated across all of its international LEED projects.