Multiply the electricity used by one drying cycle in kWh by your tariff in pounds per kWh. For an illustrative 4.75 kWh cycle at an assumed 30p/kWh, the electricity cost is £1.425, displayed as £1.43. Your dryer, programme, load and tariff determine your actual result.
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Compare energy and elapsed time
Published standard-cotton full-load figures. Each machine is rated for 8 kg.
Beko B3T4811DConventional condenser
4.75 kWh142 minutes£1.43 at assumed 30p/kWh
Beko BMN3T3823Heat pump
1.95 kWh197 minutes£0.59 at assumed 30p/kWh
55 minutes longer; 2.80 kWh less. The longer published cycle costs 84p less at this assumed tariff. Energy, rather than elapsed time, drives this calculation.
Compare two named 8 kg cotton-cycle specifications
Beko publishes the following standard-cotton full-load figures. Both machines are rated for 8 kg, but their energy use and duration differ. The amounts below use an assumed 30p/kWh and three cycles a week for 52 weeks. These are calculations from manufacturer specifications, not a same-load WashSage trial, current tariff quote or a duvet drying allowance.
| Named model / technology | Published full-load energy / time | Electricity per cycle at 30p/kWh | 156 cycles per year |
|---|---|---|---|
| Beko B3T4811D; Conventional condenser | 4.75 kWh / 142 min | £1.43 | £222.30 |
| Beko BMN3T3823; Heat pump | 1.95 kWh / 197 min | £0.59 | £91.26 |
Read the evidence: Beko B3T4811D dryer specifications · Beko BMN3T3823 heat-pump dryer specifications
The longer programme costs less in this comparison
The heat-pump example runs 55 minutes longer on the published full-load basis, while using 2.80 kWh less. At the assumed tariff, that difference is 84p per cycle or £131.04 over 156 cycles. Keep the unrounded amounts until the final display: 4.75 × £0.30 = £1.425, and £1.425 × 156 = £222.30. Multiplying the rounded £1.43 by 156 would overstate the annual example.
This explains why minutes alone are a poor cost comparison. It does not mean every heat-pump cycle saves 84p, or that either machine can dry your particular bedding. Use the relevant programme, load and conditions for each candidate.
Read the evidence: Beko B3T4811D dryer specifications · Beko BMN3T3823 heat-pump dryer specifications · Energy Saving Trust appliance guidance
Change the tariff before trusting the saving
Copy your own electricity unit price from your bill. The three rates below are deliberately assumed scenarios; they show how the same energy difference produces different costs. Standing charges, purchase price, servicing and your time are outside this marginal electricity comparison.
| Assumed unit price | 4.75 kWh cycle | 1.95 kWh cycle | Difference across 156 cycles |
|---|---|---|---|
| 20p/kWh | £0.95 | £0.39 | £87.36 |
| 30p/kWh | £1.43 | £0.59 | £131.04 |
| 40p/kWh | £1.90 | £0.78 | £174.72 |
Keep partial loads, label units and actual readings separate
A half-full drum does not prove half the energy use. Beko lists 2.53 kWh for the B3T4811D standard-cotton partial-load example. Two such specified partial cycles total 5.06 kWh, compared with 4.75 kWh for one specified full cycle. This is a comparison of the published test cases, not advice to crowd a dryer or a prediction for any two home loads.
Use kWh per cycle directly. Divide kWh per 100 cycles by 100 only for that label’s stated test basis. An annual figure includes its own use assumptions; it is not one cycle. Watts describe power, so multiplying the nameplate watts by the whole elapsed time does not measure a cycling heater or compressor. For a real reading, use appliance energy reporting or equipment expressly rated for that dryer and follow its instructions.
Read the evidence: Beko B3T4811D dryer specifications · Energy Saving Trust home appliance energy labels
Put your own drying scenario into the calculator
For drying alone, set washer electricity and washer water use to zero. Enter the relevant dryer-cycle kWh, your tariff and the number of drying cycles. Keep a separate scenario for washing. If your source gives a combined wash-and-dry figure, do not add the drying portion a second time.
Before comparing costs, make sure the item permits the treatment and that the dryer’s programme and loading instructions cover it. The cotton figures in this article do not supply a down-comforter drying time or permission. Compare an equivalent care-compatible task; a cheaper unsuitable process is not a saving.
Read the evidence: Energy Saving Trust home appliance energy labels · Bosch European laundry care symbols
Sources and scope
- Beko B3T4811D dryer specifications
- Energy Saving Trust home appliance energy labels
- Energy Saving Trust appliance guidance
- Bosch European laundry care symbols
- Beko BMN3T3823 heat-pump dryer specifications
Cost examples use stated tariffs and consumption assumptions, not a current bill or market-price quote. Use your own tariff and appliance programme data; exact product care instructions still determine the permitted wash or dry method. Report a correction with the page and supporting source.