Peak Saving
Peak Demand Savings: Reducing Demand Using Efficiency method
The Reducing Demand Using Efficiency (RDUE) sub-method of the Peak Demand Savings Method reduces demand during peak times by using energy more efficiently. For example, installing a more efficient air conditioner to reduce electricity use on hot days.
Eligible activities
The RDUE method has 4 activities. They correspond to eligible activities under the ESS:
- Home Energy Efficiency Retrofits (HEER) method
- Installation of High Efficiency Appliances for Business (IHEAB) method.
| End-User Equipment | PDRS Activity Definitionc | ESS Method and Activity Definition |
| Install or replace a residential air conditioner | HVAC1 | HEER D16 |
| Install or replace a commercial air conditioner | HVAC2 | IHEAB F4 |
| Replace a refrigerated cabinet | RF2 | IHEAB F1.2 |
| Install or replace a residential pool pump | SYS2 | HEER D5 |
a As of 1 July 2026, Activity Definition WH1 heat pump water heater activities are no longer included in the PDRS.
Read below for more information about:
- evidence you need to support PRC creation using the RDUE method
- requirements on water heater equipment
- requirements for replacing refrigerated cabinets
- fact sheets you need to give your customers.
Evidence requirements
Evidence requirements for this method are similar to requirements for the corresponding ESS methods and activity definitions. They are set out in the PDRS Method Guide.
ACPs are not restricted in the type of evidence that can be used to support certificate creation. But the evidence must show you meet the equipment, eligibility and implementation requirements as set out in the PDRS Rule.
Air conditioner requirements
Changes to air conditioner activities take effect from 1 July 2026. See the PDRS Rule and changes page and our July 2026 PDRS Reference Table for more information.
Refrigerated cabinet requirements
ACPs replacing refrigerated cabinets must ensure the new refrigerated cabinet is fit for purpose and the same class or type as the old one. See Notice 01/2024 for more details.
More information about the PDRS and calculation methods