a pile of burnt out light bulbs with a new energy efficient bulb lit hovering above

Environmental Audit 2015

» Residence Halls Retrofits

This chapter, Residence Halls Retrofits, provides a walkthrough of the lighting energy audit conducted for all existing residence halls, excluding North and South Morlan, and builds a retrofit package that provides:

  • Cost-benefit analysis
  • Return on investment
  • Environmental Impacts: Carbon emissions
  • Energy savings

Lighting retrofits for residence halls have the potential to be simple and efficient. Chapman University paid a total of $98,168.15 for lighting alone in 2014. If the recommended lighting fixtures are to be installed, it is projected that Chapman would pay a total of $62,406.41 for lighting. The university will save $35,761.75 every year for lighting.

Read more about residence hall retrofit recommendations in Chapter 5 of the audit, written by Luis Genis.

  • Electricity Distribution and Cost
  • Reduced Electricity Usage
  • The chart below shows the amount of money saved if the retrofits are installed. The projected annual bill amounts were calculated using the blended rate of $.10636. This is an overestimate as the blended rate chosen is for summer months. Each building has an average savings of about $6,000 with the exception of Harris. Using data from 2014, Harris had an estimated reduction of $14,000.


  • Retrofits can significantly reduce the amount of electricity used for lighting. With the recommended light fixtures installed, an average of 39% savings in electricity bills and energy consumption can be calculated. All residence halls see a significant reduction in the amount of electricity used for lighting. The Davis Apartments and Henley Hall see the greatest reduction in electricity, about 45% and 42% respectively. The figure below displays the expected light consumption after the recommended light fixtures are installed.

    Reduction in electricity use after retrofits