After entering a zip code, the users see the first page, which shows the average energy consumption for a typical house in their area, taken from the Residential Energy Consumption Survey (RECS) (US DOE 2009). Details on how this bill is generated are discussed under Average Energy Gills for Existing Houses. The lower half of the screen shows the questions for the quick level of calculation (Figure 2). Users have the choice of calculating the bill for their house, based on those questions, or providing more detail about their house before calculating. By answering the detailed questions (below the bar chart in Figure 2), users get results calculated using a house description that more closely matches their house.