Aerothermal Guide · Mijas & Costa del Sol

Aerothermal Heating in Mijas: What It Is, How It Works & What It Costs in 2026

Aerothermal heating is one of the fastest-growing home improvements in Mijas and the Costa del Sol. It can reduce your heating and hot water energy bills by up to 70% — and with Spanish government grants available, the installation cost is lower than ever. Here’s everything you need to know.

What Is Aerothermal Heating?

Aerothermal (or aerothermia in Spanish) is a type of air-source heat pump that extracts energy from the outside air to provide heating, cooling, and domestic hot water (DHW). It works even when outdoor temperatures drop as low as -15°C — though on the Costa del Sol, conditions are almost always ideal.

Unlike a boiler, which generates heat by burning gas or oil, an aerothermal system moves heat from the air into your home — using electricity to run the compressor. For every 1 kWh of electricity consumed, it typically delivers 3–4 kWh of heat. This efficiency ratio (called COP) is what makes it so effective at cutting energy bills.

Aerothermal vs Traditional Heating in Mijas

Aerothermal Installation Cost in Mijas (2026)

The cost of aerothermal installation in Mijas depends on the property size and whether underfloor heating or fan coils are being installed:

• Apartment (60–90 m²): €6,000–€12,000
• Townhouse / Adosado (100–150 m²): €10,000–€18,000
• Villa (150–300 m²): €15,000–€35,000

Government grants (ayudas): Spanish government subsidies (Plan PERTE VEC and IDAE programme) can cover 30–40% of the installation cost for primary residences. We help you apply.

Most homeowners in Mijas recover the net investment in 5–8 years through energy savings, with the system lasting 20+ years.

Is Aerothermal Worth It in Mijas?

Mijas and the Costa del Sol have one of the best climates in Europe for aerothermal systems. The mild winters mean the heat pump operates at high efficiency year-round. If you currently use electric storage heaters, air conditioning for heating, or have an oil boiler, switching to aerothermal typically saves €1,500–€3,000/year in energy costs on a medium-sized property.

For holiday rental properties in Mijas, it also adds a strong marketing point — guests increasingly look for eco-friendly homes with efficient heating and cooling.