Spain is one of the sunniest countries in Europe, but historically, homes here have relied on bottled gas, noisy boilers, or bulky water tanks strapped to the roof. Today, a quiet energy revolution is changing how we heat our homes and our water.
Homeowners from the breezy Atlantic coast to the sun-drenched Mediterranean are moving towards the ultimate “Green Dream Team”: Solar Photovoltaic (PV) panels paired with modern Air Source Heat Pumps (Aerothermia). Leading the charge in this technology is Kronoterm, a European pioneer whose incredibly efficient systems are making older technologies obsolete.
Whether you are a retired couple in a small coastal bungalow or a bustling family of six in a large villa, Kronoterm has tailored solutions to decouple your comfort from rising fossil fuel costs. Here is how their technology works, and which models are best suited for your home.
Turning Sunshine into a “Thermal Battery”
Before we look at specific models, it helps to understand why Kronoterm systems are so revolutionary compared to old gas boilers or solar thermal roof tanks.
Kronoterm heat pumps run on electricity, so they can be powered directly by flat, elegant Solar PV panels on your roof. They are “Smart Grid Ready”. When your solar panels are producing peak energy during the day, the system automatically uses that excess power to heat your hot water tank up to a safe, piping-hot 75°C (using eco-friendly R290 propane refrigerant).
By the time the sun goes down, you have a full tank of hot water for evening showers, heated entirely by the sun. Heating 200 litres of water with a traditional electric boiler takes about 7-8 kWh. With a Kronoterm heat pump, it only takes about 1.7 kWh—a massive 75% reduction.
Which Kronoterm is Right for You?
One of the biggest mistakes homeowners make is buying a “one size fits all” system. A heat pump that is too small will struggle to keep you warm, whilst one that is too large wastes money. Kronoterm solves this by offering distinct models tailored to your family size and heating needs.
1. The “Empty Nesters” (Family of 2)
For a couple living in a smaller home or apartment (50–150 m²), space is often at a premium, and hot water demands are predictable.
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For Heating & Cooling: The Kronoterm VERSI series is perfect here. It provides 2-6 kW of heating capacity and is incredibly compact. It is designed specifically for smaller spaces and can easily handle heating, cooling, and hot water for a two-person household.
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For Domestic Hot Water (DHW): If you are only looking to upgrade your hot water system, the WP2 LF-202B or 202S series is ideal. It features a 200-litre integrated tank, which provides more than enough water for two people taking daily showers and running the dishwasher, whilst occupying minimal space.
2. The “Full House” (Family of 6)
If you have four teenagers taking long showers, plus multiple bathrooms, washing machines, and a larger floor plan (150–550 m²), your system needs serious power.
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For Heating & Cooling: You will need the Kronoterm ADAPT series (such as the ADAPT 0724). Offering between 7 and 24 kW of heating capacity, this system can effortlessly heat a large, multi-storey home. The ADAPT system learns from your home’s heat loss and adjusts its output perfectly to keep energy bills incredibly low.
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For Domestic Hot Water (DHW): A 200-litre tank won’t cut it for a family of six. You will need the larger WP2 LF-302E (with a 270-litre tank) or, for extremely high demand, the Kronoterm SMAX series. The SMAX is built for heavy domestic use, boasting a 450-litre tank that can deliver up to 720 litres of usable hot water. You will never have to listen to complaints about cold showers again.
Underfloor Heating: The Invisible Luxury
In many parts of Spain, stone or tile floors are standard. They stay delightfully cool in the summer but can be icy in the winter. Underfloor heating is the perfect partner for any Kronoterm heat pump because it is a “low-temperature” system.
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Maximum Efficiency: Traditional wall radiators need water heated to 60°C to warm a room. Underfloor systems only need about 35°C.
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The Science of SCOP: Because the heat pump does not have to work as hard to reach that lower temperature, it uses significantly less power. Kronoterm’s ADAPT units achieve a Seasonal Coefficient of Performance (SCOP) of over 5.20. This means for every 1 unit of electricity the heat pump uses, it extracts over 5 units of free heat from the outside air!
Whisper-Quiet Operation (Inspired by Nature)
One of the biggest worries about upgrading heating systems is the noise of the outdoor fan. Fortunately, the ADAPT series is renowned as one of the quietest heat pumps in Europe.
Featuring bionic fan blades inspired by the wings of an owl, the outdoor units operate at around 42 dB(A) at one metre, dropping to roughly 38 dB(A) at five metres. To put that into perspective, it is roughly as quiet as a modern fridge humming in your kitchen. You can install it right under a bedroom window or next to your terrace without disturbing your afternoon siesta.
Smart Control via the Cloud
Whether you are at work or away on holiday, you can stay connected. Using the Cloud.Kronoterm mobile app, you can check exactly how much solar energy you have used, turn on the heating before you arrive home, and even allow technicians to perform remote diagnostics. It ensures your system is always running perfectly without the need for unnecessary call-out fees.
The Bottom Line for Spanish Homes
By combining high-efficiency Kronoterm aerothermia with solar panels, the investment pays off rapidly. Thanks to high solar self-consumption rates and government subsidies, the typical payback period for a heat pump system in Spain is now 5 to 8 years.
Upgrading to a tailored Solar PV and Heat Pump system isn’t just an “eco-friendly” choice—it is the most logical financial decision a homeowner can make today. It protects you from rising energy prices and lets you enjoy a cosy home and hot showers, powered by the very sun that makes Spain so special.