Glossary
Aerothermal heat pump (aerotermia)
An air-to-water heat pump that uses energy from the outside air to provide heating, cooling and hot water. For every kWh of electricity it delivers several of heat, so it uses three or four times less than an electric resistance heater.
How aerotermia works
Aerotermia is a heat pump that extracts energy from the outside air, even in winter, and transfers it to a water circuit. That water feeds underfloor heating, radiators or fan coils and heats the domestic hot water tank. In summer it reverses the cycle to cool. It is the standard system in new-build homes in Spain.
Why it uses less
A resistance heater turns each kWh of electricity into one kWh of heat. A heat pump moves heat from the air instead of making it, and delivers several kWh of heat per electrical kWh. That efficiency is measured by the COP.
What wiring it needs
- A dedicated line from the fuse board, with its cable size calculated and its protection (ITC-BT-25 and ITC-BT-19).
- Its own RCD and MCB, and surge protection is advisable because of the unit’s electronics.
- Enough contracted power: aerotermia adds to air conditioning, induction or a car. Sometimes the power must be raised and, for large units, switched to three-phase.
- Room in the fuse board: older homes often need it enlarged.
The electrical side costs roughly 300 to 800 euros, depending on distances and the state of the board. It pairs well with solar panels, which produce during the day when the heat pump can heat water. See increase contracted power in Seville, Spain.
Related services
Heat pump electrics
We carry out the heat pump electrical connection in Seville, Spain for aerothermal systems (aerotermia): a dedicated line from the fuse board, its own protections, adapting your contracted power and, if the unit's data sheet requires it, moving to three-phase, with the boletín registered with the Junta de Andalucía. You choose the unit and its heating installer; we leave the electrics ready and safe.
Increase contracted power
You need to increase your electricity power in Spain when the smart meter cuts everything off as soon as the air conditioning, the oven and the washing machine run together. We check what power your installation can take, upgrade the supply cable, main switch and fuse board if needed, and issue the boletín so the distributor approves the increase.
Single to three-phase
A single-phase to three-phase upgrade in Seville, Spain is what you need when your home or business is going to have very large loads: an 11 kW EV charger, certain aerothermal heat pumps or machinery. We adapt the riser cable, fit a three-phase fuse board, share the circuits between the phases and handle the boletín with the distributor.
Related questions
Need an electrician in Seville, Spain?
Call us or send a WhatsApp message with a photo of the job. You get a fixed quote before any work starts.