Before revision:  RAE contains 72 days of 1Hz data from a residential house 's mains and 24 sub-meters resulting in 6.2 million samples for each sub-meter .
After revision:  RAE contains 72 days of 1Hz data (mains and sub-meters) from two a residential house 's mains and 24 sub-meters resulting in 6.2 million samples for each sub-meter .