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Use a lower electric shower setting when it is enough

On an instantaneous electric shower with fixed power settings, a lower setting uses less electricity for the same running time.

I commit
Miniature scene: Leaving a higher fixed-power setting selected in warm weather.
Leaving a higher fixed-power setting selected in warm weather
Miniature scene: Selecting a suitable lower setting safely before showering.
Selecting a suitable lower setting safely before showering
01 / Why this can help

Your scenario, drawn

Electricity at two shower settings

Electricity at two shower settingsElectricity at the previous setting: 110 kWh; Electricity at the suitable lower setting: 70 kWh; Annual difference: -40 kilowatt-hours of electricityIN ONE YEARElectricity at the previous setting110 kWhElectricity at the suitable lower setting70 kWh0110 kWh

Same scale, starting at zero. Change the assumptions to compare the two annual totals.

Sources and scope →
Read the values
Electricity at the previous setting110 kWh
Electricity at the suitable lower setting70 kWh
Annual difference-40 kilowatt-hours of electricity
02 / One possible next step

Read the manual to identify a lower fixed-power setting and its safe switching procedure. If the control is unsafe or unreachable, ask the responsible person to help.

03 / Sources and scope

Context-dependent outcome

What the evidence supports

On an instantaneous electric shower with fixed power settings, a lower setting uses less electricity for the same running time. This can suit warm incoming water, as in many Brazilian homes.

Boundary of the claim

Follow the model’s manual. Change the setting beforehand with water closed, electricity isolated and dry hands; never while showering. Use a safe accessible control, without opening the unit or altering wiring. Keep adequate comfort. The example excludes water savings and carbon.

What this simulation calculates

The displayed powers, durations and annual count are hypothetical examples, not measured savings or specifications for your shower. Replace them only with appropriate values for your model and routine.

Published coefficients and calculation references

  1. Institutional guidance · Ministério de Minas e Energia, Brasil · 2021

    Cartilha do consumidor consciente de energia

    Consulted section (original language): Cartilha: chuveiro elétrico; launch dated 9 September 2021

    Consultation: PDF originale verificato nel dossier LAC della stessa sessione; data della pubblicazione ministeriale riconfermata via browser.

  2. Institutional guidance · Lorenzetti

    Duchas e Chuveiros Elétricos — Uso e instalação

    Consulted section (original language): Duchas e Chuveiros Elétricos: change selector only with water closed; breaker for maintenance

    Consultation: Testo primario consultato nel browser il 2026-10-17

Avoid counting the same change twice

Sources reviewed:

Report a data issue

Other possibilities in this area

At home
Miniature scene: Hang the same laundry in a ventilated room.Let a load of laundry air-dryMiniature scene: Cooling set to 26°C in this example.Find a comfortable, moderate cooling settingMiniature scene: A suitable 30°C wash in this example.Choose a cooler suitable wash
universalizable.At home / 01

Use a lower electric shower setting when it is enough

Miniature scene: Leaving a higher fixed-power setting selected in warm weather. Miniature scene: Selecting a suitable lower setting safely before showering.
Leaving a higher fixed-power setting selected in warm weatherSelecting a suitable lower setting safely before showering

Why this can help

On an instantaneous electric shower with fixed power settings, a lower setting uses less electricity for the same running time. This can suit warm incoming water, as in many Brazilian homes.

One possible next step

Read the manual to identify a lower fixed-power setting and its safe switching procedure. If the control is unsafe or unreachable, ask the responsible person to help.

What changes the outcome

Follow the model’s manual. Change the setting beforehand with water closed, electricity isolated and dry hands; never while showering. Use a safe accessible control, without opening the unit or altering wiring. Keep adequate comfort. The example excludes water savings and carbon.

universalizable.The action / 02

Your illustrative scenario

Over one year · with the assumptions below

You

40 kilowatt-hours of electricity less

You + 10 friends

440 kilowatt-hours of electricity less

1,000 participants

40,000 kilowatt-hours of electricity less

These are scenarios, not measured personal or collective savings. One separate household per participant. People sharing a home count it once, not once each.

Your inputs

Actual fixed power before
5.5 kW
Actual fixed power after
3.5 kW
Running time per shower before
6 min
Running time per shower after
6 min
Applicable showers per year
200

Calculation of the difference: (5.5 × 6/60 − 3.5 × 6/60) kWh × 200 = 40 kilowatt-hours of electricity

Calculation boundaries

Electricity for the same instantaneous electric shower and the stated occasions. Read fixed-setting powers from the manual; the maximum nameplate power is not the power of every setting. This model does not apply to variable electronic operation without a known average power. Include any change in duration. Never open or probe electrical parts. No water or carbon conversion.

The displayed powers, durations and annual count are hypothetical examples, not measured savings or specifications for your shower. Replace them only with appropriate values for your model and routine.

Sources and calculation references

  1. Cartilha do consumidor consciente de energiaMinistério de Minas e Energia, Brasil · 2021
  2. Duchas e Chuveiros Elétricos — Uso e instalaçãoLorenzetti

Read the method: universalizable.com/en/method/ · One sheet · print double-sided, long-edge binding

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