Phased Retrofits in Existing Homes In Florida Phase I: Shallow and Deep Retrofits

Stacey Rothgeb, D. Parker, K. Sutherland, D. Chasar, J. Montemurno, B. Amos, J. Kono, Stacey Rothgeb (NREL Technical Monitor)

Research output: NRELSubcontract Report


The U.S. Department of Energy (DOE) Building America program, in collaboration with Florida Power and Light (FPL), conducted a phased residential energy-efficiency retrofit program. This research sought to establish impacts on annual energy and peak energy reductions from the technologies applied at two levels of retrofit - shallow and deep, with savings levels approaching the Building America program goals of reducing whole-house energy use by 40%. Under the Phased Deep Retrofit (PDR) project, we have installed phased, energy-efficiency retrofits in a sample of 56 existing, all-electric homes. End-use savings and economic evaluation results from the phased measure packages and single measures are summarized in this report. Project results will be of interest to utility program designers, weatherization evaluators, and the housing remodel industry. Shallow retrofits were conducted in all homes from March to June 2013. The measures for this phase were chosen based on ease of installation, targeting lighting (CFLs and LED lamps), domestic hot water (wraps and showerheads), refrigeration (cleaning of coils), pool pump (reduction of operating hours), and the home entertainment center (smart plugs). Deep retrofits were conducted on a subset of ten PDR homes from May 2013 through March 2014. Measures included new air source heat pumps, duct repair, ceiling insulation, heat pump water heaters, variable speed pool pumps and learning thermostats. Major appliances such as refrigerators and dishwashers were replaced where they were old and inefficient.
Original languageAmerican English
Number of pages176
StatePublished - 2016

Bibliographical note

Work performed by Building America Partnership for Advanced Residential Construction, Cocoa, Florida

NREL Publication Number

  • NREL/SR-5500-65327

Other Report Number

  • DOE/GO-102016-4810


  • appliances
  • Building America
  • deep energy enclosure retrofits (DER)
  • existing homes
  • heat pump water heater (HPWHS)
  • HVAC
  • lighting
  • pool pump
  • residential
  • residential buildings
  • retrofit


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