After a decade of development, ice storage for small unitary air conditioners is still expensive but has the potential to be competitive with several utility-scale electricity storage technologies. It remains to be seen if the latest generation of equipment can live up to manufacturer projections.

Billions of kilowatt-hours are wasted every year by idle networked computers in offices, libraries, computer labs, and research facilities. Building managers and network administrators can significantly reduce computing costs if these idle machines are switched off.