Overview
- This week experts in Spain and Argentina reiterated that the true overnight cost of running heating or cooling depends on the type of air conditioner, the thermostat setting, the home’s insulation and the consumer’s electricity tariff.
- Modern inverter units save energy overnight by modulating compressor speed to hold temperature instead of repeatedly starting at full power, which lowers average runtime and consumption.
- Keeping a moderate, stable setpoint is more efficient than choosing extreme temperatures because each degree change alters demand by about 7% according to official IDAE guidance.
- Simple maintenance and home actions — cleaning filters, keeping the outdoor unit clear, closing shutters during sun hours, ventilating at night and using fans — reduce the thermal load and cut runtime.
- Final bills vary not just with kWh used but with contracted power, distributor and subsidy rules, so similar usage can lead to very different charges across households.