USGBC Colorado has seen a number of existing multi-family building owners invest in energy efficiency recently.“The new level of attention these leading multi-family buildings are paying to energy efficiency through their voluntary participation in the Denver City Energy Project (DCEP) points to a new trend that multi-family properties are establishing towards increased investment in energy efficiency,” said Patti Mason, Executive Director, USGBC Colorado. “This positive effort and investment will benefit Denver’s triple bottom line for decades to come."