The Modern Proud Green Home at Serenbe
The Proud Green Home at Serenbe is a design-build collaboration between LG Squared, Inc. and The Imery Group (Athens, GA). The primary goal of this home, which currently does not have an owner, is to design and build something beautiful, energy efficient and durable within the highly regarded sustainable community of Serenbe. In fact, the home’s energy consumption is projected to be net-zero which means it will produce as much energy as it uses with an on-site renewable energy source (in this case, roof top photovoltaic (pv) panels).
Before any renewable energy sources were considered, though, and to achieve this level of performance, we designed the home to use less energy. By focusing on the building envelope, site orientation, lighting, appliances and maintaining efficient layout and volume, we were able to not only accommodate generous living spaces, but also keep the energy consumption to 60% less than that of the same home built to meet the current energy code.
This means that even without on-site renewable energy (pv panels), the homeowner will have very lower energy bills. The homeowner’s will also be very comfortable and have a home that will last longer than most being built today.
- Modern design with deep overhangs, recessed fenestration, and various shading devices (canopies, trellises) to reduce heat gain in summer and allow for heat gain in winter.
- Open, efficient floor plan with minimized volume to help reduce the amount of space that needs to be conditioned.
- Slab-on-grade with continuous slab edge insulation to prevent heat loss through slab.
- High-performance windows (U-Value 0.28 or less, SHGC 0.18 or less) that reduce heat loss and gain.
- Minimized glazing area to provide adequate natural light but minimize heat gain.
- 2×6 wall construction that incorporates advanced framing techniques to reduce the amount of framing used, and to reduce thermal bridging (heat loss through material)
- Wall and roof framing cavities completely filled with open-cell spray foam to provide between R-20 and R-22 thermal resistance.
- Taped seams, joints and cracks in the building envelope with Zip System tape to provide additional air sealing to keep the infiltration and exfiltration to minimum. The infiltration target for this home is 0.5 ach50 or less.
- HVAC System: Ducted mini-split system to provide heating and cooling 30-50% more efficiently than conventional systems, including ground source heat pumps (a.k.a. geothermal).
- The home will be certified as EarthCraft House (Platinum Level), ENERGY STAR, Version 3.0, Indoor Air Plus, and Water Sense
- Large outdoor living area with fire pit and summer kitchen.