How households stay cool in summer can have a marked effect on the budget. Talent24h data show that running an air conditioner for eight hours a day can increase electricity costs by more than €50 a month, while a standard fan costs a fraction of that amount.
The comparison assumes a 60-watt fan and a 1,500-watt air-conditioning unit running eight hours a day for 30 days. On those assumptions, the fan uses 14.4 kWh a month and costs about €2.16 at €0.15 per kWh; the air conditioner uses 360 kWh and costs €54. The difference is €51.84. The 25-to-1 power ratio compares the stated rated wattages, while the monthly figures are a scenario estimate, not a universal bill: actual use depends on the appliance and household conditions, from weather and insulation to operating settings and the electricity tariff. An air conditioner may cycle or modulate rather than draw 1,500 watts continuously.
Fans: Low Cost, Practical Comfort
Fans remain a low-cost way to improve comfort during Spain’s hot season. They circulate air and help the body lose heat, but do not lower the room’s temperature. Their benefit depends on indoor temperature, humidity and airflow. Closing blinds or curtains during the day, using awnings and ventilating at night when outdoor air is cooler can help limit indoor heat and reduce reliance on cooling systems.
Even extended daily use of a fan can have a modest effect on the electricity bill under the stated assumptions. It can be a practical choice when indoor conditions are manageable, but a fan is not a substitute for effective cooling when heat becomes hazardous.
Air Conditioning: Comfort at a Price
Air conditioning removes heat from indoor air and can lower room temperature, providing cooling a fan cannot. Its electricity use can be much higher: in the example above, the assumed monthly cost is €54, compared with €2.16 for the fan. The actual difference will vary with the unit’s efficiency, thermostat setting, operating time and the home’s heat gains.
For families with young children or older people, and for those with health concerns, effective cooling can be impressive during dangerous heat. On 21 October 2026, the World Health Organization, the World Meteorological Organization, UNICEF and the United Nations Population Fund highlighted growing heat-related risks for pregnant women, newborns and children. The WHO cited evidence associating heat exposure with a 26% increase in the odds of preterm birth and called for context-specific heat-health plans and stronger early warnings. WHO said, “Our health systems need the data to recognize this reality and take action - from protecting people during heatwaves to embedding climate risk consideration into everyday health services.”
Solar Panels: Reducing the Burden
For homes with solar panels, using air conditioning during daylight hours can reduce the amount of electricity drawn from the grid when solar generation is available. The extent of the offset depends on the system’s capacity, household demand and timing of use; production and cooling needs do not always match.
For households without solar panels, a fan can be a more economical option when it provides enough comfort. Air conditioning offers greater temperature control, but its running cost depends on real-world consumption and the household’s tariff. As Spain faces another hot summer, understanding the energy costs and limits of each cooling method can help families balance comfort and expenses.
