Project Impact Assessment Method
The Project Impact Assessment Method (PIAM) was a calculation method under the ESS. It set out how to calculate energy savings based on the difference in energy consumption before and after an implementation. It could apply to a wide range of projects.
We no longer accredit ACPs under this method. As an ACP, you can only use this method to calculate ESCs if:
- you have an existing accreditation for this method
- you are using an implementation that has a date on or before 30 October 2015.
How this method may still apply for existing PIAM accreditations
Are you an ACP who is accredited to calculate energy savings using ‘annual creation’? If so, you may continue to calculate energy savings from projects implemented before 15 April 2016 for a maximum of 10 years from the project’s implementation date.
Are you accredited to ‘forward create’ and ‘top up’ ESCs? If so, you may continue to calculate energy savings using this method:
- where the implementation date of the project was on or before 30 October 2015
- if the end date of the total period of energy savings is not later than 10 years after the implementation date. That is, the sum of all periods of ‘forward creation’ and ‘top up’ for which ESCs are created.
Calculating Energy Savings
See Clause 7 and the associated tables of the ESS Rule for further information about calculating energy savings using this method.
More information
- Home Energy Efficiency Retrofits
- Removal of Old Appliances
- Sale of New Appliances
- Installation of High Efficiency Appliances for Businesses
- Commercial Lighting Energy Savings Formula
- Public Lighting Energy Savings Formula
- Metered Baseline Methods
- Project Impact Assessment with Measurement and Verification