Do Building Energy Codes Save Electricity? Evidence from the Commercial Sector

摘要

In light of the pressing impacts of climate change and rising demand for electricity, many state governments have adopted International Energy Conservation Codes (IECC) and the Energy Standard for Buildings Except Low-Rise Residential Buildings (ASHRAE 90.1) for new commercial buildings. This paper investigates the relationship between commercial building energy codes and electricity consumption on the state level. Using state-level data on commercial building code adoption and electricity use from 2004 to 2015 in OLS and fixed-effects models, I found a negative relationship between building energy code adoption and electricity consumption. States adopting the building energy codes between 2004 and 2015 are associated with a 1,968.974 million kilowatthours less electricity consumption in the commercial sector, enough to power about 18,300 households per year. However, using a fixed-effects model with a one-year lagged effect, I found a positive relationship between building code adoption and electricity consumption. In this model specification, states adopting building energy codes in the previous year are associated with a 606.918 million kilowatthours increase in annual average electricity consumption in the commercial sector, which indicates the importance of compliance with codes. The inconsistent results indicate a need for future study, which could include additional data, such as compliance with codes, number of new commercial buildings, and building activities.