Thinking about removing gas from your home and switching to a sustainable solution?
More and more people are joining this energy transition.
The goal is clear: save money in the long term, improve efficiency, reduce your carbon footprint, and stop relying on gas.

If you don’t know us yet, here’s a quick introduction: we are ERA architects. More specifically, I’m Esther Rovira, an architect and passive house designer based in Barcelona and Catalonia, specialising in the construction and renovation of passive and energy-positive homes. In this post, “Heat pump installation Barcelona Price 2026”, we explore five systems combinations using Aerothermal technology to help you achieve a cleaner, more modern, gas-free home. Let’s go!.

INDEX

  • Intro
  • Systems:
    Air-to-water Heat pump for hot water only + alternative for heating and cooling (A) splits (B) ducting
    Full Air-to-water Heat pump with underfloor heating
    Air-to-water Heat pump with fan coils heating and cooling
    Air-to-water Heat pump with radiators for heating
  • Prices
  • Summary
  • Conclusion
  • Next steps

INTRO

What is Air-to-water Heat pump technology?

Aerothermal energy is a technology that uses energy from the outside air to heat water and indoor air.
It works through an air-to-water heat pump, which is highly efficient and uses a small amount of electricity instead of gas.

Benefits of removing gas in your home

Long-term cost savings: The initial investment is offset by lower energy bills and higher efficiency.
Safety and peace of mind: Eliminating gas avoids risks such as leaks, explosions, or carbon monoxide poisoning.
Environmental sustainability: You reduce your carbon footprint by using clean electricity and renewable energy.
Energy independence: Less reliance on energy companies and greater control over your consumption.
For single-family homes, it is highly recommended to also add solar panels, battery storage, and an EV charger for cars, motorbikes, or bicycles.

SYSTEMS

1) Air-to-water Heat pump for hot water only + alternative heating and cooling

This option replaces your gas water heater with aerothermal energy to produce domestic hot water only.
It is the most efficient and most affordable aerothermal solution.

Advantages of aerothermal energy for water only

  • High efficiency: It can generate 3 to 4 times more thermal energy than the electricity it consumes.
  • Versatile installation: Suitable for apartments and single-family homes.
  • Low maintenance: Simpler than gas-based systems.
  • Low price

Heating and cooling

If you install air-to-water heat pump for water only, you will need a separate system for heating and cooling. It’s true that integrated aerothermal systems exist (explained later), but they:

  • Triple the cost
  • Require more construction work
  • Take up more space
  • Are not as efficient as combining with the following alternatives that are refrigerant based:

A) Heating and cooling with split or multisplit systems (wall units)

Very suitable for apartments or for those seeking a simple solution.

PROs:

  • Easy installation
  • Lower cost
  • Maximum efficiency (single split units are more efficient than combined or ducted systems)
  • Room-by-room comfort with remote control

CONs:

  • Air-based heating (no radiators)

B) Heating and cooling with a ducted heat pump

PROs:

  • Good efficiency
  • Uniform thermal comfort

CONs:

  • More extensive installation (requires ceiling work and repainting)
  • Higher initial investment
  • Difficult to control temperature room by room

Note: If you suffer from throat pain when using air-based systems, the next section may suit you better. Having said that, let me also tell you that air conditioning is often used at incorrect temperatures and fan power.

A personal anecdote: At home, I have an ongoing “battle” with my husband because he wants the AC set to 18°C with the fan blowing directly at his face like he is surfing th biggest wave. This gives me terrible throat pain—and it also wastes a lot of energy.

Split systems can be used with the fan off or on the lowest settings (sometimes called ‘Silent mode’), and with a temperature not too far from the outdoor temperature so the body doesn’t suffer from aggressive thermal changes. So, my suggestion is: let the system work with its natural inertia with slower rhythms and the machine will last longer and feel healthier (so will your throat!).

Ideally, set the temperature no more than 5°C below the outdoor temperature. If your home is well insulated and has good windows, this approach provides excellent comfort and health.

2) Full Air Heat pump

A full aerothermal system uses an air-to-water heat pump to provide domestic hot water, heating in winter, and cooling in summer—all with a single unit.
It is one of the most efficient and sustainable solutions, especially when combined with solar energy.

In this option, heating and cooling can be distributed through three main types of systems:

A) With Underfloor heating/cooling

Low-temperature water circulates beneath the floor, providing uniform and invisible comfort.
It can also cool in summer (while adding humidity, see comments below).
Ideal for: new builds or full renovations.

PROs:

  • Maximum comfort and efficiency
  • Invisible and completely silent
  • Ideal for new homes or major renovations

CONs:

  • Higher initial cost
  • Requires lifting floors and major construction
  • Slow thermal response
  • Not so efficent in summer in the coast line hwen thre’s humidity

👉 Recommended ONLY if:

  • You are building or fully renovating your home
  • You have a wide budget
  • You live in a cold climate (e.g. Vall d’Aran or Andorra)

❌ Not recommended for coastal areas like Barcelona or Mallorca, since summer humidity added up with a refreshing humid systems reduces comfort.

Another story: Around 80% of our clients initially ask for underfloor heating because “it feels amazing to have warm feet” (and they’re right). However, none of them end up installing it in temperate climates after working with us, because:

  • It’s expensive
  • Heating in Barcelona or Mallorca climate is not that needed
  • Cooling is more important than heating in most coastline in Spain
  • Underfloor cooling adds humidity and creates discomfort
  • Climate change is worsening these last 3 bulletpoints
  • There are simpler, cheaper ways to enjoy warm feet (for example, in bathrooms where it’s really needed)

B) With Fan coils

Fan coils are compact units that blow warm or cool air using an internal fan.
They offer fast and efficient climate control with less construction than underfloor heating.

👉 Perfect for existing homes that want full climate control without major works.

PROs:

  • Faster and simpler installation
  • Quick and precise climate control
  • Powerful cooling

CONs:

  • Air-based emission (less uniform than radiant systems)
  • Filter maintenance required
  • Visible units (some modern designs exist)

C) With Radiators

Uses low-temperature radiators powered by air-to-water technology.
👉 Ideal for cold areas, also if you already have radiators and don’t need air conditioning.

PROs:

  • Can reuse existing radiator systems
  • Almost silent
  • Dry, direct heat—ideal for people sensitive to air movement

CONs:

  • Lower efficiency if radiators are undersized
  • Requires low-temperature or oversized radiators
  • Less uniform comfort than radiant floor systems

PRICES

Estimated price ranges for 2026 (80–100 m² apartment or house):

System Approx. installed price (VAT included)
✅ Aerothermal for water only + splits €7,000 – €10,000
✅ Aerothermal for water only + ducted heat pump €9,000 – €15,000
✅ Full aerothermal + underfloor heating €15,000 – €22,000
✅ Full aerothermal + fan coils €12,000 – €17,000
✅ Full aerothermal + radiators €10,000 – €15,000

Important notes:

  • Prices include heat pump, distribution system, and usually a water tank.
  • In new builds, underfloor heating costs may be lower if integrated early.
  • Prices increase if solar panels, batteries, or EV chargers are added.
  • For Small or highly insulated homes may cost 10–20% less.
  • Prices include materials, installation, and 21% VAT (2026 reference).

SUMMARY

1️⃣ A) Aerothermal hot water only + splits

  • Pros: Low cost, fast installation
  • Cons: Less integrated aesthetics
    👉 Ideal for apartments without renovation

1️⃣ B) Aerothermal hot water only + ducted heat pump

  • Pros: Invisible design, uniform comfort, very quiet
  • Cons: Requires ducts or false ceiling
    👉 Ideal if ducts already exist

2️⃣ A) Full aerothermal with underfloor heating

  • Pros: Maximum comfort and efficiency
  • Cons: High cost, major renovation
    👉 Ideal for new builds or full renovations

2️⃣ B) Full aerothermal with fan coils

  • Pros: Powerful, flexible, less invasive
  • Cons: Visible units, slight noise
    👉 Ideal for full comfort without major works

2️⃣ C) Full aerothermal with radiators

  • Pros: Silent, easy if radiators exist
  • Cons: No cooling
    👉 Ideal for heating-only needs

CONCLUSION

Choosing the right air-to-water Heat pump system depends on your needs, your home type, and the level of renovation you’re willing to undertake.

  • For a simple, affordable, no-construction solution, aerothermal for hot water only PLUS splits is practical and effective.
  • In temperate or coastal climates (Barcelona, Mallorca, Costa Brava), aerothermal for hot water only combined with a ducted heat pump offers the best long-term comfort and efficiency.
  • In cold climates (Vall d’Aran, Andorra), underfloor heating is the most complete solution.
  • For a balanced option, fan coils offer excellent flexibility and performance.

🏁 Quick conclusion

Your priority? Best for you:
Tight budget, minimal work  ✅ Aerothermal + splits
Maximum comfort, invisible system  ✅ Underfloor heating
Balance of comfort and ease  ✅ Fan coils
Year-round high efficiency  ✅ Underfloor or fan coils
Existing home, no renovation  ✅ Splits or fan coils

In all solutions you are choosing a renewable, efficient, fossil fuel-free system that lowers emissions and gives you greater control over your energy use.

NEXT STEPS

  1. Evaluate your home, your investment range, and your family’s winter and summer habits.
  2. Get professional advice through an on-site, no-obligation visit to design the perfect system. (If you live in a house instead of an apartment, also consider solar panels, batteries, and an electrical car charger).
  3. Book a visit with our best installer in your area and take the final step toward saying goodbye to gas forever. Book installer NOW.

I hope this post, “Heat pump installation Barcelona Price 2026”, helps you take the next step.
Did we miss anything? Any burning questions? Leave them in the comments and we’ll be happy to help.

See you on the next post,

architectBarcelona

Founder of ERA architects

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