Page 16 - Zero Net Energy Case Study Homes-Volume 1

CASE STUDY NO. 1 CORONA DEL MAR NEW HOUSES
Corona Del Mar New Houses
Case Study No. 1
Data Summary
Building Type: Single-Family
Location: Corona del Mar, CA
The simplest case of residential construction is the new single-family house built on a semi- urban lot—built with new materials, modern construction methods and conforming to current residential building codes. This first case study is therefore an instructive one to illustrate the design and construction process using the current technotogies applied in a straight-forward, cost-effective and knowledgable way.
Background
703 Heliotrope Avenue and 609 Marigold Avenue are two examples of single family residences that have achieved zero-net-energy (ZNE) performance. The two houses are entirely new construction, built on previously developed lots.
The house at 703 Heliotrope was the result of a desire by the owners to build a “deep green” home for themselves near the ocean. They purchased a “tear-down” structure on a standard- sized lot in Corona del Mar in 2010. The primary goal of the project was to build a comfortable home that would achieve ZNE performance and could obtain a LEED-Platinum certification.
This case study describes the process of design and construction of this house to reach successfully the ZNE goal. When this first project was in fact successfully completed in 2013, the owners and contractor then decided to build another ZNE house in the same neighborhood, this time as a speculative venture, advertising it on the market as a “zero-net-energy house”. They found a similar though narrower lot at 609 Marigold, several blocks away, and proceeded to apply the techniques and lessons learned from the first ZNE house at 703 Heliotrope.
As paired projects with the same energy performance goals, both houses are described as part of this case study, with differences noted of intent and budget, and how these affected design decisions.
(Above) Original house on the property at 703 Heliotrope torn down for new construction.
Zero Net Energy Case Study Homes: Volume 1
Gross Floor Area:
703 Heliotrope: 4,211 gsf 609 Marigold: 2,750 gsf
Occupied:
703 Heliotrope: 2013 609 Marigold: 2015
On-Site Renewable Energy System Installed:
703 Heliotrope: 20.3 kW DC 609 Marigold: 10.9 kW DC
Measured On-Site Energy Production:
703 Heliotrope: 30,650 kWh/ year (2016-17)
609 Marigold: Not available
Owner/Client:
703 Heliotrope: Wayne and Shannon Inouye
609 Marigold: Wayne and Shannon Inouye
Project Team
Contractor: John Steed Homes, Irvine, CA
Architect: Jeanette Architects, Long Beach, CA
(Two-page spread on previous pages): Completed zero-net-energy house at 703 Heliotrope Avenue, Corona del Mar, CA. (Photo courtesy of John Steed Homes.)
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