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Title: Existing Whole-House Solutions Case Study: National Grid Deep Energy Retrofit Pilot, Massachusetts and Rhode Island

Between December, 2009 and December, 2012 42 deep energy retrofit (DER) projects were completed through a pilot program sponsored by National Grid and conducted in Massachusetts and Rhode Island. Thirty-seven of these projects were comprehensive retrofits while five were partial DERs, meaning that high performance retrofit was implemented for a single major enclosure component or a limited number of major enclosure components. Building Science Corporation developed a consistent "package" of measures in terms of the performance targeted for major building components. Pre- and post-retrofit air leakage measurements were performed for each of the projects. Each project also reported information about project costs including identification of energy-related costs. Post-retrofit energy-use data was obtained for 29 of the DER projects, and was analyzed based on the net energy used by the DER project regardless of whether the energy was generated on site or delivered to the site. Based on the community experience, this DER package is expected to result in yearly source energy use near 110 MMBtu/year or approximately 40% below the Northeast regional average. Larger to medium sized homes that successful implement these retrofits can be expected to achieve source EUI that is comparable to Passive House targets for new construction.more » The community of DER projects show post-retrofit airtightness below 1.5 ACH50 to be eminently achievable.« less
Publication Date:
OSTI Identifier:
Report Number(s):
Research Org:
Building Science Corporation
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Building Technologies Office (EE-5B) (Building America)
Country of Publication:
United States
residential; Residential Buildings; BSC; Building America; DER; retrofit; high performance retrofit; energy use; measured performance; airtightness; post-retrofit; cold climate retrofit; deep energy retrofit; National Grid; Pilot; DER Pilot; DER Pilot Evaluation