Replacement of gas boiler for an air-source heat pump with photovoltaic panels

Air-source heat pump
Heating
Cooling
DHW
Photovoltaic self-consumption
350m2 (3.767ft2) single-family house
Torrelodones (Madrid)
Replacement of gas boiler for an air-source heat pump with photovoltaic panels
+ 4.400 €
Annual savings
9 years
Payback
+ 132.000 €
Lifespan savings

Starting point

Pablo and Lorena are the owners of a house built in the 1990s in Torrelodones (Madrid), a climate zone with very low temperatures during the winter.

The house, with 350m² of heated surface area, has average insulation. All these factors mean that the heating demand is very high, especially during the winter months.

The house had a natural gas boiler and radiators as a heating system. In addition, it had an external DHW accumulator of 300 litres for domestic hot water.

Customer doubts and preferences

When this couple from Torrelodones contacted us, they told us that they wanted to replace their current heating system with a gas boiler and radiators. They were looking for an efficient and renewable system that would also allow them to cool their house in summer.

They had been looking for information for some time and they were quite clear about the best solution for their home: an aerothermal heat pump air conditioning system supported by photovoltaic panels,combined with a fan coil system to provide cooling and heating.

This solution fitted us perfectly since we are a company specialized in this type of heat pump installation with photovoltaic self-consumption. So, we prepared a proposal according to their preferences.

Our proposal

Energanova recommended the installation of an aerothermal heat pump system by the Austrian manufacturer iDM. This equipment seemed to be the most suitable one for Pablo and Lorena’s house since it is designed for very cold climates. In addition, this equipment manages to integrate the control of the air conditioning system and the photovoltaic system. This way, a greater use of photovoltaic production is achieved since electrical surpluses are used for thermal storage.

Regarding photovoltaic production, we presented 2 proposals, the first one self-consumption with storage using lithium batteries, and the second one without them.

Pablo and Lorena were clear that they wanted to achieve a very high level of energy self-sufficiency which would only be possible the installation had a photovoltaic kit with batteries. Therefore, they opted for this option even though the amortization period of a system with batteries was longer than that of a system without them (5-6 years without batteries versus 8-9 years with batteries).

For this couple from Madrid, having greater energy independence was a priority. In addition, when evaluating the investment, they took into account that both the warranty and the lifespan of the equipment were much longer than the payback period.

As usual we prepared a complete energy study free of charge to help them make their decision In the report they could check what the initial investment would be and the approximate annual consumption of the installation. This way, they could have a very approximate value of the savings generated year by year with this new system, compared to the one they had at that moment.

The self-consumption system with aerothermal and photovoltaic panels that we proposed would allow them to cover 100% of their annual energy needs for heating, cooling, and DHW. In addition, it would cover around 60% of the annual consumption of household appliances, lighting, and other electrical equipment.

This coverage is an annual average, as the percentage varies greatly throughout the year. In the months of the greatest solar radiation, it is close to 100%, whereas during winter it is around 40%.

The decision

Pablo and Lorena finally opted for the installation of an aerothermal heat pump from the manufacturer iDM, high-efficiency fan coils for heating and cooling, and a self-consumption photovoltaic kit with batteries.

Once the decision was made and the existing installation was analysed in detail, we decided to establish 4 independent control zones, which would be managed directly from the heat pump itself. To do this, we placed several temperature and humidity probes via radio in different areas of the house.

The improvement of the installation did not involve any additional cost for our customers, and it allowed them to independently regulate the temperature and schedules of the different zones. By doing so, they would increase savings while enjoying greater comfort.

The installation

Finally, the installation consisted of the following elements:

Aerothermal heat pump

Air-to-water aerothermal heat pump by the Austrian manufacturer iDM model AL 24. This equipment was perfectly adapted to the climatic needs of the area, as it maintains very good performance even at very low temperatures.

DHW storage tank

For domestic hot water (DHW) we opted for an Enertres 400-litres storage tank, model DPSA MAX-400, with a large exchange coil to achieve the heat pump’s maximum efficiency.

Heating and cooling buffer tank

For the heating and cooling inertia we installed an Enertres 500-litres storage tank, model DPI -800F.

In addition, we installed an 800-litres storage tank for thermal use of photovoltaic surpluses.

The heat pump is equipped with a Navigator 2.0 control system, which integrates a photovoltaic function. This function makes it possible to use the photovoltaic surplus and store the energy in a thermal form inside the buffer tank, for both summer and winter. If this surplus is produced in winter, it is stored in the form of hot water for heating; while if it is produced in summer, it is stored in the form of cold water for cooling.

This thermal use of photovoltaic surplus is a very effective way to get the most out of the photovoltaic panel installation and therefore turn it into a more profitable investment at any time of the year.

Regulation and control

To have better control of the installation, we placed one humidity and temperature sensor in a representative area of the house. The Navigator Pro control system, which integrates the iDM equipment, allows us to vary the supply temperature based on the information provided by this sensor. This way, we can guarantee comfort throughout the house with the minimum energy cost.

In addition, as each of the fan coil units includes its own regulation, we can have different temperatures in each room, in both heating and cooling modes.

The installation can also be controlled remotely and free of charge through the manufacturer’s app.

Photovoltaic self-consumption

The photovoltaic self-consumption installation consists of a photovoltaic kit of 7,590 kW peak power (22 panels x 345W) with a hybrid inverter brand, model Kostal Plenticore of 8kW, and storage of 20kWh in ByD brand lithium batteries.

According to our studies, we estimate that the photovoltaic production potential will be around 10,000 kWh per year, which means a self-consumption capacity of 85%.

According to this data, out of all the photovoltaic production, it will not be possible to consume approximately 15% of it since there will not be enough consumption in the house and the batteries will be fully charged. This is known as photovoltaic surplus. When these surpluses are produced, the electricity is injected directly into the grid and in exchange for doing so the electricity company will compensate the owners of the installation at a rate of approximately 0.05-0.09€/kWh. In this article, we have summarized the key aspects of the Photovoltaic Self-consumption regulations in Spain.

The best energy is the one transmitted by our customers

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C

We contacted Energanova because we wanted to change our old gas boiler for a more efficient and environmentally-friendly system. It is noticeable that they are specialists in this type of work since they have proven to be very professional at all times.

Carlos Martín
19 September 2020
A

I have worked with Energanova in the rehabilitation of a house and I am very happy with my choice. It is a close and professional company. They have a great team that explains in detail to the architect, technical architect, and builder as well as to the property the benefits of everything before, during, and after the work. Highly recommended!

Alba Balmaseda
23 April 2021
E

We were delighted with the installation. We wanted thermal emitters for our village house and everything went perfectly, they work very well. The installation was very simple and fast, fulfilling perfectly with what they offered us. They are very professional and attentive. We will work with them again.

Esther Aguín Martínez
05 August 2021
T

Excellent service. The advice they offer is outstanding, with very professional execution. Highly recommended.

Tony Doval
23 June 2021
R

The company works well. They offer different alternatives after studying your problem, answering and clarifying all the doubts you may have. They provide a fast and efficient response. They are good professionals that have adequate documentation and information about the operation of the facility. They take care of all the administrative procedures, including subsidies. We are very satisfied!

Román Lago
17 July 2020
V

We have had at home an air-source heat pump and a photovoltaic system installed by the company Energanova for a few months. As regards savings, at the moment our electricity bill has decreased by 70% and we no longer have to order diesel! If someone is encouraged to install renewable systems, I recommend that they look for a professional company. We are very happy with our choice.

Victoria Pérez
08 January 2021
C

Great company and quick installation. We renewed our old geothermal machine for one of the best in the market. The savings are impressive, and the electricity bill has fallen radically, but for me, the best thing is the after-sales service. You can obtain assistance at any time, both by telephone and face-to-face. Great job!

Carlos Vallejo
03 February 2021
J

They are great professionals, punctual, scrupulous with the work, and very serious. I will hire them again for another project. Thank you.

Jesús González
20 August 2021
A

I have carried out with ENERGANOVA a geothermal installation with photovoltaic technology and we are very satisfied with both the execution and the consumption achieved. mos. Especially, since electricity is currently skyrocketing and we only pay 20€ per month. 100% recommended company in all aspects.

Alejandra González
11 September 2021
C

I can say that they are a company in which at all times both the technical advice and professional treatment were according to my needs. If you are thinking about installing a heating/air conditioning system, do not hesitate to consider them as an option, because they are undoubtedly a solvent and serious company, which in these times is often difficult to find. Thank you Energanova!

César González
18 July 2020
L

We have been collaborating for a long time with the company Energanova in all our projects involving geothermal and air-source heat pump systems, combined with photovoltaic technology. They show experience, professionalism, and seriousness from the initial drafting of the project to the final installation. They have a great technical and commercial team that advises you in each of the phases towards the best energy solution, always transferring their extensive knowledge to you. They work with the best brands and put great care into design and aesthetics. We will continue collaborating with them and of course recommending them to every person or company that needs to carry out any renewable energy installation.

La I Desing
07 October 2021
S

Good experience, good work, meeting deadlines, and everything running smoothly. We are very happy and now even more with the rise of light prices! They have also facilitated the cumbersome process of applying to Xunta de Galicia’s subsidies. I encourage people to choose this company!!! Good choice.

Silvia Jenuario
27 October 2021
J

Excellent treatment, great professionalism, and a team dedicated to finding the best technical and economic solutions for the client.

José Luis Santamaría
05 October 2021
M

The geothermal installation plus photovoltaic panels was a success. The comfort and energy consumption that we were guaranteed was fulfilled, and despite our initial distrust towards this type of renewable energy, now we can only say that we recommend it 100%.

Marco Vaq
16 March 2021
Y

They are good professionals and very agile. I have installed photovoltaic panels with them and I am delighted.

Yago Lorenzo
19 May 2020
M

I have been advised and informed throughout the project in a very professional manner, as well as helped in the management of the subsidies. They provide customized attention and follow-up after the installation to get the most out of it. I think this is the way to switch to renewable energies, by overcoming the stress and insecurities that we may have. ENERGANOVA 100% recommended!!!!

María Soliña Opera
05 August 2020
G

Excellent: great professionalism, both in the administrative work to obtain permits and subsidies, as well as in the technical work to install the equipment. They are always paying attention to the correct operation of the installation and any incidence.

Gabriel Gijarro
19 February 2021
J

Finally, a company that gave me what it offered. It is difficult, but if in the end you find a company like this with great professionals, the result is very satisfactory.

José Antonio Sánchez González
15 May 2020
K

We have had an excellent experience with Energanova. They have complied with the deadlines, the staff was very professional, and the work was clean and very fast for both geothermal energy and photovoltaic panels. We applied for the grants of the Xunta de Galicia and they were in charge of managing it completely. We are very pleased with our choice, both for the treatment and the result of the installation.

Karla Álvarez
06 October 2021
P

I am very satisfied with this company. They have advised and informed me throughout the project in a very professional manner, they are very good technically speaking, and you can tell they have a lot of experience. Aesthetically, they have taken care of every detail so that the installation was integrated into the house and the wiring was as concealed as possible. I had other more economical proposals at first, but in the end, they even got me a grant that covered a good part of the budget. In short, ENERGANOVA 100% recommended.

Pablo Rubal
16 October 2020
J

Pincheiro AT, our apartment complex in A Pobra do Caramiñal, bets on renewable energies, especially geothermal and photovoltaic technology. We can assure you that Energanova has greatly fulfilled all our expectations. We can confirm, and this is difficult, the honesty of this company since what was budgeted at the beginning corresponds reliably to what we have been invoiced. We can only say on the part of Pincheiro AT that we feel in good hands both for what has been done on-site and in terms of the timely follow-up being performed.

José Barroso Castro
02 October 2021
S

Excellent company. You contact them and they quickly go to your home to decide what its ideal installation could be, solving any questions you may have. They have better prices compared to other renewable energy companies. Fast and well-executed installation. In my case, I asked for the Inega subsidy, and as an authorized installation company they take care of everything, being the first to get it so that you do not run out of it. If I had to do any other installation, I would contact them without hesitation.

Sandra
07 May 2021
A

Great and very fast after-sales service!!

Alberto López
06 March 2021
B

I am going to tell my experience with this renewable energy company. First of all, I must say that I have always considered myself a ‘difficult’ person as a customer, who demands seriousness and professionalism in all the services I hire, especially for my house. Well, I have to say that on this occasion my satisfaction is maximum and I want to congratulate the whole Energanova team for its professionalism through this review. Nowadays it is not easy to find companies that do things well, and I must tell you that this company does them very well.

Begoña Romero
15 February 2021
C

Quick response and excellent professionals, I recommend them with no doubt.

Cova Charlin Villanueva
01 October 2021
P

Very professional!

Proyectopía La vivienda modular a tu medida
25 July 2021
P

After wanting to invest in photovoltaic technology, I started to search the Internet for companies that could give me an estimated cost, until I found Energanova. From the start, Javier assisted me as a customer wants to be assisted, with patience and respect, because not everybody knows what a solar panel, an inverter, etc… is. Energanova is worth it; they are trustworthy. Thank you.

Poery
13 August 2020
D

I installed the air conditioning of my house with a geothermal heat pump (iDM), underfloor heating, and photovoltaic panels with Energanova. We are very satisfied with the result. As a company they are very serious and professional, they advised me at all times. With this installation, the house is very comfortable and the consumption is reduced. It is a 100% recommended company.

Da Pereira
15 September 2020
F

Energanova is a serious company, which at all times explained and helped us in everything related to the photovoltaic installation, which is perfect. They have looked for specific solutions for a much reduced space. 100% recommended.

Fernando Mejuto García
01 June 2021
M

Excellent value for money. The installation carried out has been more than cost-effective, both economically and in terms of comfort at home!

Marcos
21 May 2020
M

We only have good words regarding the solution provided by Energanova. In our case, it was an air-source heat pump and solar panels. Our house is finally warm in winter and cool in summer with a monthly cost much lower than what we were previously paying. I strongly recommend Energanova as a solution to your needs.

Manuel Vera
06 May 2020
M

I have been advised and informed throughout the project in a very professional manner, as well as helped in the management of the subsidies. They provide customized attention and follow-up after the installation to get the most out of it. I think this is the way to switch to renewable energies, by overcoming the stress and insecurities that we may have. ENERGANOVA 100% recommended!!!!

María Soliña Opera
05 August 2020
J

Pincheiro AT, our apartment complex in A Pobra do Caramiñal, bets on renewable energies, especially geothermal and photovoltaic technology. We can assure you that Energanova has greatly fulfilled all our expectations. We can confirm, and this is difficult, the honesty of this company since what was budgeted at the beginning corresponds reliably to what we have been invoiced. We can only say on the part of Pincheiro AT that we feel in good hands both for what has been done on-site and in terms of the timely follow-up being performed.

José Barroso Castro
02 October 2021
S

Good experience, good work, meeting deadlines, and everything running smoothly. We are very happy and now even more with the rise of light prices! They have also facilitated the cumbersome process of applying to Xunta de Galicia’s subsidies. I encourage people to choose this company!!! Good choice.

Silvia Jenuario
27 October 2021
G

Excellent: great professionalism, both in the administrative work to obtain permits and subsidies, as well as in the technical work to install the equipment. They are always paying attention to the correct operation of the installation and any incidence.

Gabriel Gijarro
19 February 2021
J

Finally, a company that gave me what it offered. It is difficult, but if in the end you find a company like this with great professionals, the result is very satisfactory.

José Antonio Sánchez González
15 May 2020
C

We contacted Energanova because we wanted to change our old gas boiler for a more efficient and environmentally-friendly system. It is noticeable that they are specialists in this type of work since they have proven to be very professional at all times.

Carlos Martín
19 September 2020
P

Very professional!

Proyectopía La vivienda modular a tu medida
25 July 2021
E

We were delighted with the installation. We wanted thermal emitters for our village house and everything went perfectly, they work very well. The installation was very simple and fast, fulfilling perfectly with what they offered us. They are very professional and attentive. We will work with them again.

Esther Aguín Martínez
05 August 2021
L

We have been collaborating for a long time with the company Energanova in all our projects involving geothermal and air-source heat pump systems, combined with photovoltaic technology. They show experience, professionalism, and seriousness from the initial drafting of the project to the final installation. They have a great technical and commercial team that advises you in each of the phases towards the best energy solution, always transferring their extensive knowledge to you. They work with the best brands and put great care into design and aesthetics. We will continue collaborating with them and of course recommending them to every person or company that needs to carry out any renewable energy installation.

La I Desing
07 October 2021
B

I am going to tell my experience with this renewable energy company. First of all, I must say that I have always considered myself a ‘difficult’ person as a customer, who demands seriousness and professionalism in all the services I hire, especially for my house. Well, I have to say that on this occasion my satisfaction is maximum and I want to congratulate the whole Energanova team for its professionalism through this review. Nowadays it is not easy to find companies that do things well, and I must tell you that this company does them very well.

Begoña Romero
15 February 2021
T

Excellent service. The advice they offer is outstanding, with very professional execution. Highly recommended.

Tony Doval
23 June 2021
D

I installed the air conditioning of my house with a geothermal heat pump (iDM), underfloor heating, and photovoltaic panels with Energanova. We are very satisfied with the result. As a company they are very serious and professional, they advised me at all times. With this installation, the house is very comfortable and the consumption is reduced. It is a 100% recommended company.

Da Pereira
15 September 2020
J

They are great professionals, punctual, scrupulous with the work, and very serious. I will hire them again for another project. Thank you.

Jesús González
20 August 2021
C

I can say that they are a company in which at all times both the technical advice and professional treatment were according to my needs. If you are thinking about installing a heating/air conditioning system, do not hesitate to consider them as an option, because they are undoubtedly a solvent and serious company, which in these times is often difficult to find. Thank you Energanova!

César González
18 July 2020
F

Energanova is a serious company, which at all times explained and helped us in everything related to the photovoltaic installation, which is perfect. They have looked for specific solutions for a much reduced space. 100% recommended.

Fernando Mejuto García
01 June 2021
P

After wanting to invest in photovoltaic technology, I started to search the Internet for companies that could give me an estimated cost, until I found Energanova. From the start, Javier assisted me as a customer wants to be assisted, with patience and respect, because not everybody knows what a solar panel, an inverter, etc… is. Energanova is worth it; they are trustworthy. Thank you.

Poery
13 August 2020
P

I am very satisfied with this company. They have advised and informed me throughout the project in a very professional manner, they are very good technically speaking, and you can tell they have a lot of experience. Aesthetically, they have taken care of every detail so that the installation was integrated into the house and the wiring was as concealed as possible. I had other more economical proposals at first, but in the end, they even got me a grant that covered a good part of the budget. In short, ENERGANOVA 100% recommended.

Pablo Rubal
16 October 2020
M

The geothermal installation plus photovoltaic panels was a success. The comfort and energy consumption that we were guaranteed was fulfilled, and despite our initial distrust towards this type of renewable energy, now we can only say that we recommend it 100%.

Marco Vaq
16 March 2021
A

I have worked with Energanova in the rehabilitation of a house and I am very happy with my choice. It is a close and professional company. They have a great team that explains in detail to the architect, technical architect, and builder as well as to the property the benefits of everything before, during, and after the work. Highly recommended!

Alba Balmaseda
23 April 2021
K

We have had an excellent experience with Energanova. They have complied with the deadlines, the staff was very professional, and the work was clean and very fast for both geothermal energy and photovoltaic panels. We applied for the grants of the Xunta de Galicia and they were in charge of managing it completely. We are very pleased with our choice, both for the treatment and the result of the installation.

Karla Álvarez
06 October 2021
J

Excellent treatment, great professionalism, and a team dedicated to finding the best technical and economic solutions for the client.

José Luis Santamaría
05 October 2021
A

I have carried out with ENERGANOVA a geothermal installation with photovoltaic technology and we are very satisfied with both the execution and the consumption achieved. mos. Especially, since electricity is currently skyrocketing and we only pay 20€ per month. 100% recommended company in all aspects.

Alejandra González
11 September 2021
C

Great company and quick installation. We renewed our old geothermal machine for one of the best in the market. The savings are impressive, and the electricity bill has fallen radically, but for me, the best thing is the after-sales service. You can obtain assistance at any time, both by telephone and face-to-face. Great job!

Carlos Vallejo
03 February 2021
M

We only have good words regarding the solution provided by Energanova. In our case, it was an air-source heat pump and solar panels. Our house is finally warm in winter and cool in summer with a monthly cost much lower than what we were previously paying. I strongly recommend Energanova as a solution to your needs.

Manuel Vera
06 May 2020
V

We have had at home an air-source heat pump and a photovoltaic system installed by the company Energanova for a few months. As regards savings, at the moment our electricity bill has decreased by 70% and we no longer have to order diesel! If someone is encouraged to install renewable systems, I recommend that they look for a professional company. We are very happy with our choice.

Victoria Pérez
08 January 2021
M

Excellent value for money. The installation carried out has been more than cost-effective, both economically and in terms of comfort at home!

Marcos
21 May 2020
Y

They are good professionals and very agile. I have installed photovoltaic panels with them and I am delighted.

Yago Lorenzo
19 May 2020
S

Excellent company. You contact them and they quickly go to your home to decide what its ideal installation could be, solving any questions you may have. They have better prices compared to other renewable energy companies. Fast and well-executed installation. In my case, I asked for the Inega subsidy, and as an authorized installation company they take care of everything, being the first to get it so that you do not run out of it. If I had to do any other installation, I would contact them without hesitation.

Sandra
07 May 2021
C

Quick response and excellent professionals, I recommend them with no doubt.

Cova Charlin Villanueva
01 October 2021
A

Great and very fast after-sales service!!

Alberto López
06 March 2021
R

The company works well. They offer different alternatives after studying your problem, answering and clarifying all the doubts you may have. They provide a fast and efficient response. They are good professionals that have adequate documentation and information about the operation of the facility. They take care of all the administrative procedures, including subsidies. We are very satisfied!

Román Lago
17 July 2020

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.