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Weather normalization explained

May 16, 2024
UpdatedNovember 1, 2024
ByTeresa Byler
Views2391
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What is weather normalization?

Weather normalization in the hotel industry is a process used to adjust and standardize performance metrics, such as energy consumption, to account for variations in weather conditions. This allows hotels to accurately compare their performance against the target. More info on weather normalization can be found here.

How does it work?

The standard indoor temperature for Europe is 18℃ for heating and 22℃ for cooling. These are the base temperatures used for comparison.

These numbers can be adjusted for your hotel on the Fact sheet.

    • Go to Advanced settings, Fact sheets, then scroll to the bottom of the list to adjust the base temperatures.

The Base year method is used, and the data is normalized by our partner, Energy Data.

Image: The Learning screen in the GoGreen Energy cockpit, with Weather normalization option 

Heating degree day (HDD)

This is calculated based on the number of degrees needed to heat the building to 18℃.

If it is 5 degrees outside, it would take 13 degrees to heat the building to 18℃. Therefore, the HDD number for that day would be 13.

The heat degree values for each day for the past month are added up to reach the monthly HDD score.

Cooling degree day (CDD)

This is calculated based on the number of degrees needed to cool the building to 22℃.

If it is 32 degrees outside, it would take 10 degrees to cool the building to 21℃, and the CDD number for that day would be 10.

The cooling degree values for each day for the past month are added up to reach the monthly CDD score.

Troubleshooting tips

This section provides additional troubleshooting advice for readers experiencing specific issues. While it’s packed with useful insights, you may skip it if you’re not facing any related problems.

What does GG stand for?

In PMI “GG” stands for GoGreen. This initiative focuses on sustainability and environmental responsibility. The abbreviation “GG” is commonly used by users when referring to sustainability tools and features within the full PMI software suite called GoGreen. For more about the GoGreen module view this article: GoGreen home overview.

GoGreen – “Green-Light” Routine

Every day

1. Banner is green? Great – data’s in. If red, chase the missing file.

2. Progress bar colour:

  • • Red bar → already over target → find the leak today.
    • Amber bar → slightly above forecast → ask the team what changed.
    • Green bar → on pace → no action.

3. Leave a one-line comment (“Boiler fault – gas up 18 % – engineer booked”).

4. Update your tasks (tick what’s done, add new fixes).

Every week

1. Scan the 12-month consumption chart

  • Look for any resource line that is creeping up – tackle it before budget season.

2. Export scores (Excel)

  • Send the file to Engineering and the F&B cost controller.
  • Agree who owns each amber/red variance.

3. Update the SMART forecast if operations changed

  • Big event cancelled? Enter a negative adjustment so the target resets and the team isn’t “over” for no reason.

4. Tidy the cockpit

  • Clear any lingering red banners (missing days).
  • Archive completed tasks so only live actions remain.

5. Celebrate wins

  • If the monthly bar is green and trending down, grab a screenshot and share it on the staff board – positive feedback drives future engagement.

Remember the order

  1. Data banner – proof the numbers are fresh.
  2. Progress bar – shows whether you are on pace.
  3. Comments – turn facts into context.
  4. Task-bank – turns context into action.

Goal Distribution Tool (GDT)

What is GDT? The GDT helps set long-term sustainability goals at the chain level, breaking them down into property-specific and monthly targets. These targets are visible in the GoGreen cockpit and Planning pages.

Goal Targets Not Displaying

  • Ensure that goals have been properly set and distributed at the chain level.
  • Check if the property has the required data, such as historical usage and occupancy figures.
  • Verify that the property’s activities and local weather conditions have been factored into the calculation.

Correct, change, register or add consumption

To register consumption, use the 'Add consumption' button within the cockpit. This allows for the input of new consumption values easily. If needing to update an entry, simply input the new value; PMI will override the previous entry with the new one, ensuring the latest data is always reflected. However, note that imported values cannot be overwritten in this manner. For tracking food waste specifically, use the "Production" category to enter total food waste figures accurately.

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