Short-Term Test Results: Transitional Housing Energy Efficiency Retrofit in the Hot-Humid Climate

Stacey Rothgeb, Stacey Rothgeb (NREL Technical Monitor)

Research output: NRELSubcontract Report


This project evaluates the renovation of a 5,800 ft2, multi-use facility located in St. Petersburg, on the west coast of central Florida, in the hot humid climate. An optimal package of retrofit measures was designed to deliver 30-40% annual energy cost savings for this building with annual utility bills exceeding $16,000 and high base load consumption. Researchers projected energy cost savingsfor potential retrofit measures based on pre-retrofit findings and disaggregated, weather normalized utility bills as a basis for simulation true-up. A cost-benefit analysis was conducted for the seven retrofit measures implemented; adding attic insulation and sealing soffits, tinting windows, improving whole building air-tightness, upgrading heating and cooling systems and retrofitting the airdistribution system, replacing water heating systems, retrofitting lighting, and replacing laundry equipment. The projected energy cost savings for the full retrofit package based on a post-retrofit audit is 35%. The building's architectural characteristics, vintage, and residential and commercial uses presented challenges for both economic projections and retrofit measure construction.
Original languageAmerican English
Number of pages42
StatePublished - 2013

Bibliographical note

Work performed by BA-PIRC/Florida Solar Energy Center, Cocoa, Florida

NREL Publication Number

  • NREL/SR-5500-57406

Other Report Number

  • DOE/GO-102013-3853


  • Building America
  • Building America Partnership for improved residential construction (ba-pirc)
  • cost-benefit analysis
  • end use disaggregation
  • energy cost savings
  • energy efficient retrofit
  • residential
  • residential buildings
  • simulation true-up
  • transitional housing


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