Appliance shopping usually comes down to a sticker: a coloured scale from green to red, a letter grade, and a few numbers about annual energy and water use. Those figures are genuinely standardised and genuinely useful, but they answer a narrower question than most shoppers assume. They tell you how the appliance performs on a fixed laboratory test cycle, not how it will perform in your kitchen with your habits.
What the label actually measures
The EU Energy Label uses a harmonised test protocol for each appliance category, so a washing machine's kWh-per-cycle figure is comparable across brands because every unit ran the same programme under the same conditions. The scale was rescaled in recent years specifically because too many models had clustered at the top, and A+++ style stacking had stopped meaningfully differentiating products. Today's A rating is deliberately hard to achieve, which restores some discrimination to the top of the scale.
Energy Star, used in the United States, works differently: it is a pass or fail certification rather than a graded scale, meaning a qualifying appliance meets a minimum efficiency threshold but the label itself does not tell you how far above that threshold it sits. For finer comparisons between two Energy Star models, the EnergyGuide yellow tag with its estimated annual operating cost is the more useful document.
Where the numbers can mislead
Laboratory cycles use fixed load sizes, water temperatures and default settings. A household that runs half-loads, favours a hot wash, or uses a heated dry setting on a dishwasher will see materially higher consumption than the label implies. The label is a comparison tool between products, not a forecast of your bill.
Repairability: the newer, less familiar score
Separate from the energy label, some categories now carry a repairability or durability index, scoring criteria such as availability of spare parts, ease of disassembly, availability of repair documentation, and how long the manufacturer commits to supplying parts after the sale. This score does not appear on every product yet, and coverage varies by country and category, but where it exists it is one of the few standardised proxies for how long an appliance is likely to remain economically worth fixing.
Why repairability changes the maths
An efficient appliance that becomes unrepairable after five years can cost more over its life, in replacement and disposal, than a slightly less efficient one that lasts fifteen. Running cost and lifespan are both inputs to total cost of ownership.
How to compare two products properly
- Note the annual kWh and, for washers and dishwashers, the annual water use figure printed on the label, not just the letter grade.
- Multiply annual kWh by your actual electricity tariff to get a rough yearly running cost, then project it over the expected lifespan of the category.
- Check whether a repairability or durability score is published for that product category and compare it alongside the energy figures.
- Look up the manufacturer's stated spare-parts availability window, which is often published separately from the label.
- Weigh purchase price against the combined running-cost-plus-lifespan estimate rather than the sticker price alone.
Categories where the gap is largest
- Tumble dryers: heat-pump models test dramatically lower on energy use than vented or condenser types, and the gap shows up quickly in real bills.
- Refrigeration: larger fridge-freezers with poor insulation can post surprisingly high annual figures despite a reasonable letter grade.
- Dishwashers: eco cycles used in testing run far longer than typical shoppers expect, which is part of how they achieve their rating.
A label tells you what a machine did on one test in one lab. It does not tell you what it will do in your house for the next decade.
Reading past the marketing
Retail displays sometimes emphasise the old, pre-rescale letter grades on legacy stock, or highlight a feature unrelated to the standardised test, such as a quiet mode or a smart app. Neither substitutes for the label's own figures. Where a repairability index is absent, it is reasonable to ask a retailer directly about parts availability and warranty length before buying, since manufacturers increasingly publish this information on request even where it is not yet mandatory on the label itself.
