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Household

One washing machine load at 30°C

Yksi pyykkikoneellinen 30 °C:ssa

1.3
Truecost score
Data confidence: MEDIUM

Energy savings vs. 60°C well-documented by Electrolux and academic studies. Carbon calculation follows proportionally.

A 30°C wash produces ~0.25 kg CO₂e — less than half of a 60°C wash. Modern detergents clean effectively at low temperatures while reducing microfiber release.

Did you know? Heating water accounts for up to 90% of a washing machine's energy use. Dropping from 60°C to 30°C halves emissions while modern detergents maintain cleaning power.
Transparent calculation

How was this number determined?

The Truecost score is calculated from absolute physical values. Each row below shows the measured value, how it was normalized, and where it comes from.

Dimension Absolute value Score 100 = Normalized Weight Weighted Confidence
Carbon Emissions 0.25 kg CO₂e 9.5 kg CO₂e 2.63 ×0.35 0.92 MEDIUM
Water Consumption 55.0 liters 3840 liters 1.43 ×0.2 0.29 MEDIUM
Land Use 0.0 m²·year 51 m²·year 0.0 ×0.2 0.00 HIGH
Waste 0.004 kg 5 kg 0.08 ×0.15 0.01 MEDIUM
Toxicity 1.5 µDALY 162 µDALY 0.93 ×0.1 0.09 LOW
Truecost score (weighted sum) 1.3

Share of your annual planetary budget

Carbon Emissions 0.03%
Water Consumption 0.01%
Waste <0.01%
Toxicity <0.01%
Source data by dimension

Where do the absolute values come from?

Carbon Emissions
MEDIUM
Electrolux (2023): switching from 40°C to 30°C saves 38% energy. Extrapolating: 30°C uses ~57% less energy than 60°C (AEG 2024). 60°C cycle: 0.764 kWh → 30°C: ~0.33 kWh. At EU grid 0.4 kg CO₂/kWh: 0.33 × 0.4 = 0.13 kg electricity + detergent/water = ~0.25 kg total. Consistent with Electrolux data: 30°C reduces GWP by ~57% vs. 60°C.
  • Electrolux Group (2023): Europe turns to 30° wash, driving down CO₂ emissions
  • AEG (2024): The 30 degree washing guide for energy savings
  • Stamminger et al. (2023): Toward sustainable household laundry — Environmental Health Research
  • EEA (2023): Greenhouse gas emission intensity of electricity generation in Europe

Energy savings well-established: 30°C uses 50-60% less energy than 60°C because water heating dominates electricity use (up to 90% per Energy Star). Carbon reduction proportional.

Water Consumption
MEDIUM
Slightly less than 60°C because no cooldown rinse needed before spin. Modern machines: ~50-55L at 30°C vs. 55-60L at 60°C. Difference is marginal.
  • Pakula & Stamminger (2010): Electricity and water consumption for laundry washing

Water use difference between temperatures is small. Machine age matters more.

Land Use
HIGH
No direct land use per wash cycle.

Not a relevant dimension.

Waste
MEDIUM
Detergent packaging: ~2g. Microfiber shedding reduced at lower temperatures (De Falco et al. 2019): ~20-30% less than 60°C. Total ~4g effective waste.
  • De Falco et al. (2019): The contribution of washing processes to microplastic pollution — Scientific Reports 9

Lower temperature reduces microfiber release. Cold water detergents now widely available.

Toxicity
LOW
Same detergent chemicals as 60°C but slightly lower activation/release at lower temperature. Reduced microfiber pollution also reduces aquatic toxicity pathway. Estimated 1.5 µDALY.
  • Bajpai & Tyagi (2007): Environmental impacts of detergents — J. Cleaner Production

Marginally lower toxicity than 60°C due to reduced microfiber release and chemical activation.

Comparisons

Methodology

Energy reduction from Electrolux (2023) and AEG (2024) data. Carbon calculated proportionally from 60°C baseline using EU average grid intensity.

Sources