Project Info

Complete
Project Title 
ROOF TOP UNIT RETROFIT INITIATIVE: WHITE PAPER
Project Number 
HT11SCE0110
Organization 
SCE
End-use 
HVAC
Sector 
Commercial, Residential
Project Year(s) 
2011

It is estimated that roughly 70% of the non-residential space in California is conditioned by packaged Roof-Top Units (RTUs). This prevalence makes these units a key component of any energy efficiency programs targeting non-residential buildings. However, addressing the energy performance of this equipment is complicated by their longevity. These stand-alone RTUs are estimated to last approximately 20 years on average in California climates. This long replacement cycle, combined with the relatively slow rate of adoption of high efficiency equipment (e.g. Western Cooling Challenge equipment) in this market, serve to limit the market penetration rate of energy efficient HVAC in light commercial buildings.

One option for improving the energy efficiency (EE) and peak electric demand of RTUs within a shorter time frame would be an initiative to improve EE through cost effective RTU retrofits. The potential strategies related to this RTU retrofit initiative are the subject of this white paper. These strategies are focused on the facilitation of self-sustaining business models for profitably delivering comprehensive RTU retrofits that save electricity and natural gas, while significantly reducing peak electricity demand.  

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