Frequently Asked Questions: aerothermal, geothermal, heat pump

Frequently asked questions

In this section we will answer some of our customers’ most asked questions

  • Aerothermal
  • Geothermal
  • Photovoltaic
  • Emission Systems
  • Ventilation

The installation of underfloor heating allows the installation of any type of flooring (ceramic, parquet, etc.), although the most recommendable are ceramic tiles because they have a high thermal conductivity.

Geothermal energy is the use of heat coming from inside the Earth to obtain renewable energy. We can use it to air-condition our home thanks to a heat pump and thus obtain heating, cooling and hot water.

It is an emission system that consists of circulating water at low temperatures through pipes installed under the floor. This allows heat to be distributed evenly throughout the room, promoting the feeling of comfort and reducing operating costs. Underfloor heating can also be used for cooling; for this we will circulate water at a temperature between 12º-19ºC (54-66ºF), providing a pleasant cooling sensation.

The minimum supply temperature in cooling mode varies depending on the humidity of the environment.

The operation of aerothermal energy basically consists of a heat exchange using an aerothermal heat pump. The heat pump takes thermal energy from the air and transfers it to a refrigerant liquid through a heat exchanger. This liquid becomes gaseous and reaches a compressor where it increases the pressure and consequently the temperature of the refrigerant gas. This increase in temperature is used to heat a flow of water that transports the heat to the inside of the house through the corresponding emission system (underfloor heating, low-temperature radiators, fan coils, etc.). This process can be reversed to extract heat from the inside, thus also becoming a cooling system.

No, it does not require a lot of space. In the case of a split design heat pump (bibloc), we have to install an outdoor unit and an indoor unit that is the size and appearance of a refrigerator, whereas with the compact design heat pump (monobloc) only an outdoor unit needs to be installed.

Both geothermal and aerothermal energy use inexhaustible energy sources to air-condition a house, but the way to obtain this energy in each case is different. For aerothermal energy the heat contained in the air is used, whereas in geothermal energy we make use of ground temperature to obtain heating, cooling, and hot water for a house.

Photovoltaic energy is the direct transformation of solar radiation into electricity through photovoltaic panels.

The main difference is the use they make of solar energy: thermal energy absorbs it and transforms it into heat, whereas photovoltaic energy uses the sun’s energy to transform it into electricity.

Another difference is the way in which these energies can be stored. While photovoltaic energy is stored in batteries, thermal energy is stored in water tanks.

Yes, photovoltaic panels also work on cloudy days. To generate electricity, photovoltaic panels capture the energy from sunlight and not from the sun’s heat, so it still works even if it is cloudy. What does vary depending on the radiation is the power delivered by the panels.

Yes, in general, we can say that it can be installed anywhere. It is only necessary to have a piece of land to make the loop circuit, as long as it is not protected land or a resource used by a spa, hotel, etc.

cleaning theme once a year should be enough unless you live in a very polluted or dry area where it hardly rains. In that case it might be advisable to do it twice a year.

The average payback period is around 6-7 years compared to a traditional gas or diesel installation.
This period can vary depending on factors such as the climate zone, the surface area to be air-conditioned, and the level of insulation of the house. The more severe the climate zone, the larger the house, and the worse the insulation level, the greater the savings and the shorter the time needed to amortize the investment. Geothermal energy is more interesting and faster amortized the higher the energy demand is.
It is also important to note that this amortization period can be reduced by up to 60% by taking advantage of the subsidies approved each year by the different regions in our country.

The initial investment for a single-family house of approximately 150m² (1615ft²) is around 20,000-24,000€, depending on the performance and the manufacturer.

Since it does not perform any type of combustion, the maintenance of the heat pump is practically non-existent, which means a significant saving associated with these costs.

The heat pump (in heating mode) must carry the water to about 30-40°C (86-104ºF) to achieve its best performance. For that reason, it is very important to have emission systems that operate at low temperatures, such as underfloor heating or fan coils. This does not mean that the use of emission systems that require higher temperatures such as traditional radiators cannot be used. It only means that their use will not allow the heat pump to achieve its maximum performance. Even so, this performance will be much higher than what we could achieve with a traditional gas/diesel boiler.

It certainly does As less water needs to be heated, and at a lower temperature, the energy savings to be produced are very high. That is why it makes a great combination with heat pumps.
There are two types of low-temperature radiators: static (natural convection) and dynamic or fan coils (forced convection).

Low-temperature radiators, as their name suggests, are emission systems that work with low-temperature water.
While conventional radiators need to reach temperatures between 55-80°C (131-176ºF), low-temperature radiators can work perfectly well between 35-50°C (95-122ºF). Moreover, low-temperature radiators contain between 80%-90% less water than a conventional radiator.

Ventilation with heat recovery is a ventilation system where the quality of the air is efficiently guaranteed, given that when we ventilate these systems use a heat recovery unit to avoid energy loss. By filtering and acclimatizing the air that enters from the outside, it is possible to achieve a high degree of thermal comfort as well as clean and renewed air, expelling to the outside the harmful particles present in the stale air.

This type of ventilation has multiple advantages, but one of the most important is energy saving since the renewal of the stale air is done without thermal losses thanks to the heat recovery unit. Another of its many advantages is that the air entering the rooms is pure and renewed as it passes through filters to avoid the accumulation of dust mites, humidity, and bacteria.

In addition to these advantages, it is environmentally friendly, easy to install, and comfortable to use, as it provides uniform and constant ventilation.

There are two types of controlled mechanical ventilation with heat recovery:
Ventilation with decentralized heat recovery: It consists of placing a single-insulated system on each exterior wall that takes fresh air from the outside and extracts stale air from the inside, causing a heat exchange between both airflows.
Ventilation with centralized heat recovery: It consists in centralizing the ventilation at a point where the air arrives and leaves to the different rooms of the house through an invisible network of ducts housed in the false ceiling or wall.

It is a renewable energy that harnesses the heat contained in the air, to air-condition our home thanks to a heat pump and thus obtain heating, cooling, and hot water.

Find out how much you can save with a photovoltaic self-consumption system with heat pump.

No initial investment. You will pay for it with the savings generated.