Great Green Home | Lake Knowles by E2 Homes

Zero energy homes come in all shapes and sizes. The U.S. Department of Energy Zero Energy Ready certified home on Lake Knowles in Winter Park, Florida, is a great example of how ultra-modern can also be ultra-efficient. The two-story, 3,912-ft² home should cost its homeowners less than $50 a month to heat and cool thanks to energy-efficient construction, high-efficiency HVAC, and a 10-kW solar photovoltaic (PV) system. These features helped the home achieve a Home Energy Rating System (HERS) score of 5, making it essentially a zero energy home, or one that produces as much energy as it uses in a year. Typical new homes built to code in the U.S. would score a HERS 80 to 100. Even without the PV included, the efficient home would score a HERS 60 and cut energy bills for its homeowners by one-third (to under $200 per month) compared to a home built to the Florida state energy code, which is equivalent to the 2012 International Energy Conservation Code.

These savings are especially impressive considering that the modern design dictated that 34% of the structure would be glass, not solid walls. Even the garage doors are glass. The performance is a credit to the builder, Rob Smith, whose company, E2 Homes, has specialized in high-performance custom, luxury homes and remodels in Central Florida since 2005.

Project Data:

  • Name: Lake Knowles
  • Location: Winter Park, FL
  • Layout: 5 bdrm, 4 bath, 2 fl, 3,912 ft2
  • Climate Zone: IECC 2A, hot-humid
  • Completion: Fall 2015
  • Category: Custom for buyer 

Modeled Performance Data:

  • HERS Index: without PV 60, with PV 5
  • Projected Annual Energy Costs: without PV $2,258, with PV $610
  • Projected Annual Energy Cost Savings (vs home built to 2012 IECC): without PV $1,191, with PV $2,851
  • Projected Annual Energy Savings: without PV 9,925 kWh, with PV  23,764 kWh
  • Added Construction Cost: without PV $0

The images and information in this gallery were provided by the U.S. Department of Energy. See more great green homes like this one at the DOE Tour of Zero.

Topics: Building Green, GREAT GREEN HOMES

Companies: U.S. Department of Energy

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