Heat pumps in Torrevieja and the Costa Blanca

Why heat pumps are the right answer on the Costa Blanca

The Mediterranean climate of the Costa Blanca, with mild winters between 8 and 16°C minimum and hot but not extreme summers on the coast, is exactly the optimal range for a modern heat pump. Heat pumps extract energy from outside air even when it’s 4-5°C and use it to produce winter heating, summer cooling and domestic hot water. Performance is measured by COP (coefficient of operation), which for a modern unit in this climate sits between 3.5 and 4.5. That means 3.5 to 4.5 kW of heat per kW of electricity consumed.

Compared with a conventional electric heater that produces one kW of heat per kW of electricity, a heat pump is three to four times more efficient. The annual bill for an average household switching from direct electric heating to aerothermal typically drops 50 to 65%, depending on prior insulation and use habits.

Air-to-air or air-to-water, which to choose

Air-to-air is what we commonly call reversible AC. It takes outside air, converts it to cold or warm, and pushes it indoors through wall, ceiling or duct units. The simplest and cheapest option. Works perfectly for climate control but doesn’t produce domestic hot water. For small or medium apartments already with an electric water heater, this is the sensible choice.

Air-to-water, also called aerothermal, goes a step further. The outdoor unit heats or cools water that circulates through radiators, underfloor heating or fan coils to condition the home, while at the same time heating a hot-water tank of around 200 litres for showers and taps. It’s the integral solution for villas and large homes, and payback against traditional gas + AC is 8-12 years in this climate.

When it doesn’t make sense to switch

Aerothermal isn’t always best. For small apartments 50-70 m² used only off-season by non-resident owners, the upfront cost is hard to recover. Sensible to keep the electric water heater and add a reversible air-to-air split for occasional climate control.

For homes with a relatively new (under 5-7 years) gas boiler and working AC, early swap to aerothermal also doesn’t pay. High investment without enough annual saving to justify scrapping good equipment. Better to wait until the boiler nears end of life and then plan the transition.

The installation process

A full aerothermal install is a serious project. It starts with home heat-load calculation, unit sizing to real needs, choice between radiators only, underfloor only or combination, planning space for ACS tank and outdoor unit, and a fixed quote.

Physical install takes 2 to 5 days depending on complexity. It covers outdoor unit mounting, indoor ACS tank install, full hydraulic connection to existing or new circuit, electrical wiring from the board with dedicated circuit and RCD, smart control configuration and commissioning with full testing. We hand over installation certificate and user manual at the end.