[ellisv]

> A large office building or school campus uses many times more electricity than residential counterparts, and they have the P&L incentive to cut costs wherever possible (such as through smart metering and devices that communicate with one another to maximize efficiency).

The difference is that commercial and industrial buildings already try to minimize costs. In the residential space, occupants often aim for comfort over cost - sometimes missing out on opportunities to retain comfort while minimizing cost. So there may be more relative opportunity to cut costs in the residential sector than commercial or industrial. Of course the sector with the largest opportunity is probably transportation.