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Testvérhegy Project first phase

This project located in Testvérhegy in Budapest consists of two different construction phases. A first phase as per described below, consisting on 75 apartments and a second phase of 98 apartments.

In this project it was decided to install ground source heat pumps because it is the most efficient system of HVAC using renewable energy and being able to produce heating, cooling, passive cooling and DHW.

Testverhegy instalacion edificio 2

The main source of energy of the first phase of 75 apartments are 2 ecoGEO HP3 25-100 kW ground source heat pumps, being able to generate 200 kW of thermal power to meet the demand of all the apartments.

The collection system consists of 42 ground boreholes 100m deep.

 Testverhegy instalacion bomba de calor min

Thanks to the use of ground source heat pumps, it is possible to achieve incredibly high efficiencies as shown in the picture below.

During the month of March the seasonal performance was 5, that is, consuming 1 kW of electrical power to generate 5 kW of thermal power or, what is the same, obtaining 4 kW of thermal power by extracting energy from the boreholes. Throughout the year the seasonal performance is improved up to 5.5.

This performance data indicates that the savings in the heating bill have been extremely large, compared to any other type of traditional heating or even compared to air source heat pumps.

In addition, another great advantage of the ecoGEO variable speed heat pumps is the ability to install them in small spaces and through very simple installations, achieving savings in space and in installation components.

Data installation heat pump

Installation data:

  Location: Budapest (Hungary)

  Year: 2020

  Category: Ground source

  Model: 2 x ecoGEO HP3 25-100

  Power: 200 kW

  Services: Heating, cooling and DHW 


The Ecoforest group was founded in Vigo in 1959 at the hands of its owner and founder Jose Carlos Alonso Martínez, specializing in the heating sector. In 1993, Ecoforest became the first European manufacturer of pellet hydro stoves, bringing to the market a new, ecological and economic product.

Currently, Ecoforest is the leading company in the market with the widest range of pellet stoves and boilers. In 2012, Ecoforest decided to bet in another innovative technology and launched its first ground source heat pump to the market, being the only Spanish manufacturer of this product and the most specialized in inverter technology on the planet.

The R&D department of Ecoforest continues to innovate every day, in order to develop more advanced and more efficient products. Currently Ecoforest products can be found in more than 30 countries around the world.


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