In the building industry, the term Zero Energy Home (ZEH) or building can be interpreted in a variety of ways. And it is not simply a semantic argument: targeting one definition versus another can have significant impacts on building practices, utility demand profiles and construction programs and policies. Therefore, it is important to review the different definitions of “zero” and the relevant benefits and shortcomings of each. This paper will review three primary “ZEH” definitions – zero peak, zero net-electricity and zero net-energy – and how community-scale implementations of these strategies can improve cost-effectiveness while enhancing zero energy and zero peak benefits.
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