This documentation relates to EnergyCAP version 3.6.
If you are using a different version, please view the Documentation for All Versions and select the relevant version.
Calendarization more accurately allocates utility bill usage and cost data for reporting purposes by dividing the data into day-size chunks and allocating them to the appropriate calendar month using weather adjustments. Without daily meter readings the splitting can’t be exact, but it is reasonably accurate.
Most utility bills have start and end dates that do not correspond to an exact calendar month:
Exact calendar month:
|Start date: 9/1/2011||End Date: 10/1/2011|
|Start date: 10/1/2011||End Date: 11/1/2011|
Typical utility bill:
|Start date: 9/12/2011||End date: 10/14/2011|
|Start date: 10/14/2011||End date: 11/13/2011|
Why calendarize? Calendarization provides better month-to-month and year-to-year comparisons for reporting purposes by more accurately allocating monthly usage from bi-monthly and quarterly bills, estimated bills, and bills with variable billing periods (28 days one month, 34 days the next). The calendarized data is therefore more representative of actual monthly energy use when used in fiscal reporting, budgeting, auditing, accruals and energy performance evaluation.
In EnergyCAP, two methods of calendarization are used.
Option 1: Simple average daily use and cost allocation:
When a meter is not weather sensitive, the bill is simply prorated into each month based on the number of billing period days. A bill from 9/12 to 10/14 has 32 days (the first day counts, the last day doesn’t because the next bill begins on 10/14). There are 19 days in September, so 19/32 of the usage and cost is allocated to September and 13/32 to October.
Option 2: Weather (degree day) allocation:
When a meter is weather sensitive, the simple method described above is inadequate and provides less reliable results. A much more sophisticated method is used to prorate the weather sensitive portion of the energy bill based on the number of degree days in the appropriate billing period in each month, and to prorate the remaining non-weather sensitive portion based on the number of days. See the Use vs. Weather topic for more details.
In EnergyCAP, calendarized data is displayed in two places: calendarized reports and the Calendarized Data tab.