The Cottle Net Zero Energy Home: The first HERS-certified NZE new home in California

Friday, May 31, 2013
Noon to 1:30pm
Free and open to all; bring your lunch.


A Committee on the Environment program.

This Net Zero Energy project case study will present the design, construction and performance of the first HERS-certified NZE new home in California, which achieved special recognition by the CEC.  This ground-breaking project is now known as “The Hair Dryer Home” since it can be heated with only a hair dryer as documented in a YouTube video. The presentation will highlight:

  • A NZE design framework; energy loads analysis, conservation and production
  • Passive House design as a fundamental conservation strategy
  • Key climate-specific design issues and strategies
  • Performance results from DOE Building America program monitoring data
  • Energy offset opportunities for synergistic transportation fuel/carbon reduction.

Learning Objectives: 

  • Understand the fundamentals,  issues and challenges of NZE design
  • How do Passive House methodologies and standards contribute to NZE design
  • Recognize the important new characteristics and behaviors of super-insulated buildings and their mechanical systems
  • Understand the potential for building and transportation energy synergies

About the Presenter: Allen Gilliland graduated from the London School of Economics in 1974 and had careers in Management Consulting, Software, Restaurants and Internet startups prior to founding One Sky homes in 2002. For the past eleven years One Sky Homes has developed extensive experience in advanced, high-performance residential building design and construction. One Sky Homes recently commissioned the first HERS-certified Net Zero Energy new home in California, the Cottle ZEH in San Jose, which is also a Certified Passive House,  LEED Platinum and received a Special Resolution of recognition from the California Energy Commission.

Allen is a licensed California building contractor, a Certified Green Building Professional, a Certified Passive House Consultant and Designer, and US Dept of Energy “Building America” Partner. He regularly participates in regional, national and international Passive House conferences and speaks to local building professional and student groups about high-performance building. He leads One Sky Homes Design/Build team which focuses exclusively on Net Zero Energy, Passive House and similar “Energy Balanced” building projects in Silicon Valley.

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