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Daily Life

One use of electric hand dryer (warm air, 30 seconds)

Yksi käsikuivaajan käyttökerta (lämmin ilma, 30 sekuntia)

0.0
Truecost score
Data confidence: MEDIUM

Carbon depends on dryer wattage and local grid. EU average used. Water and waste are essentially zero.

One warm-air hand dryer use produces ~7 g CO₂e (EU grid) and generates zero waste. Significantly lower impact than paper towels.

Did you know? Hand dryers beat paper towels on nearly every environmental metric. Modern jet dryers produce under 3g CO₂ per use — 5x less than paper towels.
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 0.007 kg CO₂e 9.5 kg CO₂e 0.07 ×0.35 0.02 MEDIUM
Water Consumption 0.003 liters 3840 liters 0.0 ×0.2 0.00 HIGH
Land Use 1e-05 m²·year 51 m²·year 0.0 ×0.2 0.00 HIGH
Waste 0.0 kg 5 kg 0.0 ×0.15 0.00 HIGH
Toxicity 0.0 µDALY 162 µDALY 0.0 ×0.1 0.00 HIGH
Truecost score (weighted sum) 0.0

Share of your annual planetary budget

Carbon Emissions <0.01%
Source data by dimension

Where do the absolute values come from?

Carbon Emissions
MEDIUM
Conventional warm air hand dryer: 1,800–2,300W typical (VELO NZ 2024). Using 2,100W midpoint × 30 seconds = 0.0175 kWh per use. EU average grid intensity ~0.4 kg CO₂/kWh (EEA 2023) = 0.007 kg CO₂e. Mitsubishi Electric reports ~3g CO₂ per use for energy-efficient models. Gregory et al. (2013) found conventional warm air dryers: 10-20g CO₂e/dry.
  • Gregory et al. (2013): Life-cycle assessment comparison of hand-drying options — Environmental Science & Technology
  • VELO NZ (2024): Hand Dryer Wattage & Energy Use Guide
  • Mitsubishi Electric: How much CO₂ do hand dryers emit?
  • EEA (2023): Greenhouse gas emission intensity of electricity generation in Europe

Range: 3-20g CO₂ depending on dryer wattage, dry time, and grid carbon intensity. Newer high-speed jet dryers use 500-1,200W and dry faster.

Water Consumption
HIGH
No direct water use. Only indirect water from thermal power plant cooling. At 0.0175 kWh, negligible.
  • Gregory et al. (2013): Life-cycle assessment comparison of hand-drying options

Near-zero water footprint is a major advantage over paper towels.

Land Use
HIGH
No direct land use. Electricity infrastructure land use is negligible per single use.

Essentially zero.

Waste
HIGH
Zero waste per use. The dryer itself has embodied impact but amortized over ~200,000+ uses, per-use waste is negligible.
  • Gregory et al. (2013): Life-cycle assessment comparison of hand-drying options

Zero waste is the key advantage over paper towels.

Toxicity
HIGH
No chemical exposure. Some concerns about blowing bacteria around restrooms (Leeds 2014) but not toxicity in the µDALY sense.

No toxicity concern. Hygiene debates exist but are not in scope.

Comparisons

Methodology

Energy calculation: typical warm air dryer (2,100W) for 30 seconds = 0.0175 kWh. Carbon intensity from EU average grid (EEA 2023). Cross-referenced with Gregory et al. (2013) LCA.

Sources