Smart thermostats – also referred to as wifi thermostats – are promoted as a measure that can produce substantial household energy savings and increased comfort and convenience for residential utility customers, beyond less costly traditional programmable and nonprogrammable thermostats. Interest in smart thermostats as a promising energy savings measure has increased in recent years as energy efficiency program administrators seek to identify new products and programs to make up for sharply reduced energy savings in the residential lighting sector, and to enable demand response programs that seek to reduce seasonal peak energy usage.