The 2009 Seattle Energy Code requires buildings 20,000 ft2 or larger to collect energy usage data for the whole building daily, at a minimum. Flow meters and current censors are permitted for submetering. Separate submetering is required for HVAC systems, lighting, plugs, electrical energy, and heat content. Energy usage must be displayed in a visible, accessible area and contain information regarding daily energy use, average and peak energy use for the previous day, average use from the same day the previous year, and the total energy demand for the previous 12 months. The code also includes compliance requirements, including mandatory energy credits.