Find annual energy, not only the grade
A letter, star count or coloured scale helps within a label system, but annual kWh is the direct bridge to an energy-cost estimate. Find the exact model in the official registry where possible and copy its annual consumption value.
Compare like with like
Product capacity, size, climate class and test assumptions can differ. Two refrigerators with different volumes or two air conditioners with different outputs are not a fair comparison simply because both labels show kWh.
Apply a personal rate
Multiply annual kWh by the energy rate that applies to the household. Do not automatically use the total-bill effective rate when fixed charges will remain. If the tariff is time-based and the appliance can shift, test the likely time band separately.
Keep purchase and energy costs separate
A lower-energy product can have a different purchase price, warranty or service cost. Report energy cost as one line of a decision rather than calling it total cost of ownership.
Save the product model, label date, annual kWh and rate used in the comparison. If a tariff changes later, the energy calculation can then be repeated without reconstructing which label value belonged to which product.
Worked example: two models
Inputs
- Model A: 260 kWh/year
- Model B: 330 kWh/year
- Entered energy rate: 0.25/kWh
Working
- A annual energy cost = 65.00
- B annual energy cost = 82.50
- Energy-cost difference = 17.50/year
Sources for this guide
EnergyGuide labels
Federal Trade Commission
Official label guidance; use the model's label value in cost scenarios.
Open official resourceEnerGuide label
Natural Resources Canada
Official appliance and equipment energy-label guidance.
Open official resourceEuropean Product Registry for Energy Labelling
European Commission
Verify registered model label information.
Open official resourceUnderstand the Energy Rating Label
Australian Government
Use label annual energy values rather than guessing from stars.
Open official resourceEnergy rating labels
Energy Efficiency and Conservation Authority
Official consumer explanation of product energy labels.
Open official resourceMandatory Energy Labelling Scheme
National Environment Agency
Official appliance-label scheme and covered products.
Open official resource