2012 Challenge Participant:
Applicant: Peter Fusaro - Builder
Project Address: Old Greenwich, CT
Bdrms./Sq. Footage: 5 BD - 3671 sq ft
Builder Website: www.preferredbuilders.biz
Nicknamed “The Performance House,” this five bedroom 2,670 square foot house in Old Greenwich is on a small 7,510 square foot lot with tight setbacks, oriented for southern exposure. The design aesthetic fits into the neighborhood surroundings, focusing on long-term durability, building science principles and green construction techniques. Careful attention to detail was given to the deconstruction of the existing structure. The design team’s goal was to ensure the highest energy and resource efficiency for the home.
Orientation and Envelope:
Marvin Integrity windows were chosen for durability and performance to meet ENERGY STAR Version 3.0 requirements. With a 0.28 U-Value, the continuous seal and patented window frame reduces thermal bridging and condensation. South side glazing will have a higher SHGC to allow heat gain in the winter months. During the summer months, when the sun is higher, the 2’ overhangs will shade the heat gain.
- Walls: Total R-Value 27.5, achieved through 1.5” rigid foam board (R-7.5), plus Blown-In-Blanket System (BIBS) R-20 in 2x6 cavity
- Ceiling/Roof: Total R-Value 50, achieved through 5.5” closed cell spray foam (R-37), plus 3.5” foil faced fiberglass batt (R-13)
- Basement Walls: 2.5” closed cell foam (R-15) against foundation walls, behind studs
- Slab Insulation: 3”closed cell foam (R-20) under entire slab & vertical at stem wall
Heating, Cooling, and Hot Water:
Heating will be provided by a natural gas Buderus ultra efficient 96% AFUE wall-mounted boiler with a Grundfos Alpha Circulating pump. This sealed combustion unit was chosen to eliminate the possibility of back drafting which will support the indoor air quality. Carrier hot water coils and Carrier air handlers will be built into this hydro-air system. For cooling, Carrier Infinity condenser units with efficiency of SEER 16.5/EER 13.5 were chosen. Domestic hot water will be supplied by two on-demand tankless hot water heaters with a 0.93 Energy Factory (EF).
Ultimate Air Energy Recovery Ventilator (ERV) was designed to provide the ultimate in fresh air throughout the home. All indoor air quality will meet EPA Indoor airPLUS program requirements.
All appliances and electrical fixtures will meet ENERGY STAR requirements including LED lighting and an electric vehicle (EV) charging station located in the garage. Shutoff switches to control items in the house when not in use will be manageable through smartphone technology.
This home will be using a 5kW grid-tied photovoltaic (PV) system to offset the electrical load. Additionally, an electric vehicle (EV) charging station will be located in the garage.
Resources Sustainability Features:
All concrete, copper, iron and aluminum from the existing structure were recycled
- Green demolition: electrical fixtures, hot water heater, vanities fixtures and air conditioners were donated
- A storm water management plan for the site has been designed to direct all water runoff into a retention storage system
- Recycled glass content in all the concrete walls
- Low flow faucets, showerheads, and toilets will be installed to meet EPA’s WaterSense labeling program.