Inhabit posted a story about a net-zero energy small house (1,051 sq ft) built recently in Fort Worth:
Zero Energy Casita in Texas Opens to the Public | Inhabitat – Green Design Will Save the World.
2010/06/14
2010/06/12
Our Home Efficiency Improvements
Lisa and I recently went on the Austin Cool House Tour co-sponsored by the Texas Solar Energy Society and Austin Energy Green Building.
We realized the efficiency retrofits to our home were pretty similar to what we saw on the tour, so for fun I thought I’d write up the green feature list of our house in the same format as used by the tour book.
Spangler Home – Northwest Austin
Built as a traditional non-green building, this Austin home has been retrofitted for energy efficiency and simple but high-tech living.
Owners: Lisa and Jason Spangler
Solar PV: Texas Solar Power Company
Green Features
- 10KW grid-tied solar photovoltaic array (by Texas Solar Power Company)
- Whole-home energy monitor (TED 5000).
- White reflective metal roof (Sheffield Metals CoolR Solar White Galvalume – Reflectivity 0.68, Emissivity 0.85, SRI 82, 25% recycled content, 100% recyclable – installed by Southwest Metal Roofing Systems).
- Level 2 EVSE (electric vehicle car charger) and a Chevy Volt range-extended electric car
- Lawn replaced with native plant and prairie garden which requires almost no supplemental watering. Crushed granite and limestone paths allow water penetration. Mature trees provide shade.
- R-38 insulation in attic with R-8 ductwork. R-9 garage door insulation.
- 1 gpm low-flow showerheads (from New Braunfels-based Bricor). Shut-off values on showers for optional Navy shower.
- Solar screens on all windows.
- Energy Star appliances from the highest CEE efficiency tier (dishwasher, refrigerator, clothes washer and dryer). Energy Star electronics.
- 19 SEER multi-zoned HVAC system with variable speed motor and fan coils, and programmable thermostats.
- All lighting is CFL or LED. (LED fishtank and main kitchen lighting reduces energy usage of most-used lights.)
- High efficiency aerodynamic ceiling fans with timed remotes throughout. (Gossamer Wind fans)
- Masonry and fiber cement siding and trim (Hardiboard).
- Ethernet networking (Cat6) and high speed Internet connection enables telecommuting to save energy and reduce emissions. Energy-efficient computers. Notebook and Home theater systems that sleep when not in use.
- Weather station (Davis Vantage Pro2 Plus)
- Easy access to transportation – bike lanes, public transportation (bus stop 0.4 miles away), two light rail stations nearby (4.0 and 5.2 miles).
Any other ideas for increasing energy efficiency or going more green? Leave the in the comments!
Update: Here is an aerial photo of the metal roof and solar panels from Google Maps:
