Case Study / The Green Home

Nestled in the hills of Walnut, CA is the new ABC Green Home 2.0. Developed and built by Pomona Valley’s Habitat for Humanity and designed by KTGY, this net zero energy, multi-generational family home will demonstrate how easily an affordable, buildable and certified energy efficient home can be built. The home will be on display for six months upon completion to allow the building industry and general public view the house, and will then be donated to a combat disabled U.S. Veteran and their family.

The ABC Green Home 2.0 is a two story, 2,443 square foot home built specifically with energy efficiency in mind. This Spanish Mission style home incorporates an outdoor central courtyard that will allow the homeowners to turn off the air conditioning, and utilize their protected outdoor space, thus saving power and electric costs. The home’s design also incorporates a 9 kilowatt solar panel system by Peterson Dean. As a net zero energy home, the house will only produce as much energy as needed, storing the excess energy to the grid to be used at night. Since solar panels can be seen as an eye sore, they will be masked by a field of vegetation to blend the panels into the property.

In order for this home to be extremely energy efficient, the walls were constructed with a double layer of Tyvek® StuccoWrap®, followed by ThermalStar® Chrome® T&G, then StructaWire 316, and lastly covered by a LaHabra® one coat stucco system. ThermalStar Chrome T&G by Atlas EPS was a perfect fit for the ABC Green Home 2.0 due to its enhanced R-value and low global warming potential. The insulating cells of this enhanced expanded polystyrene material contain only air, making the product very sustainable and eco-friendly. Next, the internal wall space from floor to roof deck was spray insulated using lcynene® foam, making the wall an R21 and the roof deck an R38. The roof has Cool Roof clay tiles by Boral™, which are ENERGY STAR approved and, like several of the other products, contribute towards LEED credits.

ABC Green Home 1.0 was successfully completed in 2012, paving the way for ABC Green Home 2.0. ABC Green Home 2.0 is going to provide the same quality and sustainability as the original home, however there are greater challenges with this second build due to its large size. The ABC Green Home 2.0 has 3 bedrooms, 2.5 baths, and a multi-generational suite for accommodating extended family. It is being built per ENERGY STAR, NAHB Green, LEED for Homes California Advanced Homes, Cal Green and Build It Green standards, and will be used to demonstrate its high performance building standards. With the various sustainable elements incorporated, it is a great example of how an energy efficient house does not require an unconventional layout or unique equipment.

For more information on The ABC Green Home, be sure to visit their website at