|Originally appeared on designbymany|
Passive House for New Orleans
According to Architecture 2030 and the U.S. Energy Information Administration, the building sector consumes two-thirds (77%) of all electricity produced in the U.S. and is responsible for producing nearly half (46.9%) of U.S. CO2 emissions in 2009. By comparison, transportation accounted for 33.5% of CO2 emissions and industry just 19.6%. Globally, these numbers are even worse. However with this enormous problem, comes enormous potential. As the Obama Administration recently outlined in the Better Building Initiative, building energy efficiency is the most cost effective way to reduce our energy consumption and dependence upon fossil fuels.
The technologies necessary to achieve significant energy reductions in buildings are cheap and readily available: no exotic mechanical systems or costly renewable energy sources are needed. The technologies have already been successfully applied to achieve dramatic reductions in tens of thousands of buildings across Europe and North America using the Passive House Standard, the world's most rigorous building energy standard. By combining an airtight, thermal-bridge free and super-insulated building enclosure, with passive internal and solar gains with balanced energy recovery ventilation, buildings built to the Passive House Standard have shown measured reductions in space heating and cooling energy consumption up to 90% compared to standard energy code requirements.
This challenge, coinciding with the 2011 AIA National Convention, seeks to address this issue directly by engaging the design community in developing a series of affordable, low-energy, single-family homes for the communities in New Orleans that are still recovering from the devastation wrought by Hurricane Katrina. The homes that are rebuilt in these communities will need to be sustainable in the broadest sense of the term: affordable to build and purchase, long-lasting, with minimal impact on the local environment, and affordable to heat and cool throughout the life of the building. Adhering our Challenge Objectives to the Passive House Standard will insure that all of these goals are met.
One of the first Passive House projects completed in the US, the Fairview House in Urbana, Illinois, was sold to a resident displaced by Hurricane Katrina. It's time to give New Orleans residents a Passive House of their own to come to home to.
Lower Ninth Ward, New Orleans, LA
Typical lot in the Lower Ninth Ward. Please see the provided site model
Design a low-cost, extremely low-energy home for New Orleans
Homes should meet post-Katrina building codes, guidelines and best practices
Homes should be shotgun typology and strive to create cohesive neighborhoods
Program — 1000 sf, to include (2) Bedrooms, (1) Full Bath, (1) Half Bath or 1250 sf, to include (3), Bedrooms, (2) Full Baths
First floor elevation - +5' above grade
Lot size - 40'x104'
Setback — 20' front yard with 6' front porch, 20' rear yard, 3-5' side yard
Orientation — Typically long-axis along East/West, but consideration should be given to a North/South orientation as well
Design should strive to achieve Passive House Standard:
- Airtight building shell ≤ 0.6 ACH @ 50 pascal pressure (simple, well-detailed construction)
- Annual heat requirement ≤ 15 kWh/m2/year (38.1 kNtu/sf/yr)
- Designs should demonstrate that affordable and sustainable homes can also be beautiful
Key Passive House metrics spreadsheet
PHPP Climate data for New Orleans
Building site with setbacks. Orientation may be changed (.dwg, .3dw, .rvt)
Post design model and documentation (3d and/ or 2d)
Post Key Passive House metrics spreadsheet
Post diagrams explaining approach (optional)
Post video explaining approach (optional)
For more click HERE.