California Home Becomes First Passive House in State and First Passive House Retrofit in U.S. case study August 2012 • Super insulation that is airtight and minimizes thermal bridging (cool/ heat loss). • Highly efficient windows and doors. • Mechanical ventilation with heat recovery. • Innovative, efficient cooling and heating technology. T echnically speaking, this means that the maximum cooling or heating demand must not exceed 1.4 kilowatt- hours (kWh) per square foot per year, the total primary energy demand must not exceed 11.1kWh per square foot per year and air infiltration must be less than 0.6 air changes per hour. Passive House Training and Energy Testing Milburn took time off from his business to complete the certified Passive House Institute-US (PHIUS) training

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