Step to use Online benchmarking tool
Step 1: Select your Building Category
User is firstly required to choose the building category of a building. Definition of Building category is illustrated in the Glossary.
Figure 1 – Online Benchmarking Tool – Building Category
Step 2: Input Electricity Utilization Index of a building
Figure 2 – Online Benchmarking Tool – Electricity Utilization Index
Step 3: How to obtain Annual Electricity Consumption (kWh/annum) of your building
a) User can collect the 12-month period electricity consumption data of a building from associated meter devices if available; or
b) Collect the 12-month period electricity consumption data of a building in kWh from landlord’s and all tenants’ electricity bills.
There are different types of electricity bill for non-residential tariff customers:
For CLP Power Hong Kong Limited (CLP), there are three types of tariffs:
- Non-Residential Tariff (Bill sample)*;
- Bulk Tariff (Bill sample)*;
- Large Power Tariff (Bill sample)*
- Notes of Tariff
For HK Electric Investments Limited (HEC), there are two types of tariffs:
- Non-Residential Tariff (Bill sample)*;
- Maximum Demand Tariff (Bill sample)*
* Please note the “unit” in the tariff mean “kilowatthour kWh”.
Step 4: How to obtain total internal floor area (m2) of your building. With reference to the Building Energy Efficiency Ordinance (Cap.610), ‘total internal floor area’, in relation to a building, a space or a unit, means the sum of the floor area of all enclosed spaces measured to the internal faces of enclosing external and/or party walls for the whole building
A sample to calculate the total internal floor area (m2) is illustrated as follow:
Step 5: Identify the electricity utilization performance of a building. After inputting the calculated electricity utilization index to the online benchmarking tool, the following messages will be displayed for user to identify which Quartile does the building belong to.
The electricity utilization index of your building is in one of 4 quartiles in the respective category of building.
Quartile | Definition |
---|---|
1st Quartile | Your Electricity Utilization Index is among the range between 1% and 25% of the sampled buildings (i.e. Buildings in the 1st Quartile consume less electricity per square meter in a year than those buildings in the 2nd, 3rd and 4th Quartile) |
2nd Quartile | Your Electricity Utilization Index is among the range between 26% and 50% of the sampled buildings (i.e. Buildings in the 2nd Quartile consume less electricity per square meter in a year than those buildings in the 3rd and 4th Quartile) |
3rd Quartile | Your Electricity Utilization Index is among the range between 51% and 75% of the sampled buildings (i.e. Buildings in the 3rd Quartile consume less electricity per square meter in a year than those buildings in the 4th Quartile) |
4th Quartile | Your Electricity Utilization Index is among the range between 76% and 100% of the sampled buildings |
Step 6: Way forward
Building owners may consider the general advice on energy conservation to improve the building energy efficiency and hence their electricity utilization index after using the Online Benchmarking Tool.