Zero Net Energy Production Builder Demonstration: Hayward Monitoring Report

Under the auspices of PG&E’s Zero Net Energy (ZNE) Production Builder Demonstration, Meritage Homes built a 2,047 square foot ZNE home in Hayward, CA. This report describes the results from monitoring the occupied home for a full year.

Actual site energy use was compared to two models: one using the Typical Meteorological Year (TMY) for California Climate Zone 3, and the other using the Actual Meteorological Year (AMY) for Hayward. Despite some significant differences in individual end use categories, the total site energy use was 4% less and 11% more than modeled projections using TMY and AMY, respectively.

Domestic hot water was the largest energy end use, at 44% of total site energy use. Plug loads, non-cooking appliances, and cooking appliances represented the next largest energy end uses, at 24%, 13%, and 10% of total energy consumption, respectively. Appliance energy use was dominated by the gas cooking range, accounting for 37% of appliance energy use and 8% of total energy use.

Five ZNE homes were designed and constructed in this Emerging Technologies project. The first set of reports detailed the design and construction process of a ZNE home in Stockton built by Habitat for Humanity of San Joaquin County. They can be found here at the ETCC website: Link 

In addition detailed reports about the other 4 participating houses are available:

• Brentwood
• Greenfield (CHISPA)
• Loomis
• Clovis

A combined report for all 6 projects can be found here: link