Contracting & Technology above 2,000 m2.


About us

Engineering & installation for the next 20 years based last 20 years

Each Client, Partner & project is UNIQUE

Timing - scheduling - quality – function guarantee - engineering – human & operation friendly - capability - reliability - flexibility - solution solving - some of the most important items why our Clients trust to ENSI Kft.

Present (past) and future

Main office located in Budapest, Hungary. Most of the todays activities Hungary, some at Russia, Poland, Germany and preparing to Norway.


The ENSI Kft (ENergy Saving Inter-national) was established by two Scandinavians companies, Solberg & Andersen AS (SAAS) and ENSI AS at 1994.


In 1997 the company was purchased by Laszlo Nemeth. Following the profile-clearing we concentrate our activity to the industrial engineering & HVAC construction area.


The sales revenue of the ENSI Kft.


The ENSI Kft. become a full family property in the year 2007

Between the years 2005-2007 Németh Family re-purchased the proportions of property of 25% which were sold in the years 1998-1999.


Target market

Year 2011: market to buildings over 20.000 m2.

Year 2010: opening to external markets outside of Hungary.

Year 2009: establish sales network, opening to the industrial & energetical customers.

Year 2006: market to buildings over 2.000 m2.

Year 2005: SAP system applied.



The ENSI Kft. in the leading group

During the previous years the ENSI Kft. has became one of the prominent companies among the building engineering contractors in the Hungarian building industry: Based on its sales revenue in the year 2007 it is the third, year 2011 is the biggest Engineering & Contractor company at Hungary.


Market in numbers:


Prospects for the future, objectives

One of the most important missions of the previous and the following years is the reliable and the professionally and financially prepared building engineering constructional service.

For this mission I am and we are continuously looking for such partners who can inspire my enterprise in technical and financial fields and with whom "we jointly step forward" building on the mutual advantages.

ENSI Kft. is one of the most reliable members of business in Hungary

Our purpose is - ENSI Kft. shall stay on as market leader in the field of the quality, quantity and flexibility at Hungary and extend activity and solutions to abroad too!


Laszlo Nemeth - ENSI managing director, owner

Laszlo Nemeth

CEO & represent of the owners

      ENSI Building Engineering, Technological and Energetical Constructing Ltd. - HVAC installation in Buildings over 2.000 m2


  • Assessment of needs, quoting
  • HVAC design
  • Operational and energetical consulting
  • Complete implementing and constructing of HVAC system
  • Installation of industrial manufacturer technologies
  • Full implementation of energetical, operational projects
  • Acquisition of HVAC equipments
  • Technical control of HVAC
  • Licensing of HVAC
  • Service and maintenance




  • Energetical investments
  • Industrial plants
  • Business centers, office blocks
  • Commercial installations
  • Other, special buildings, e.g. embassies, large kitchens, film studios, musical centers, etc.

          HVAC implementing


Clients - Partners

  • Construction general contractors
  • Real estate developers
  • Industrial customers

Countries, where we work

  • Hungary
  • Russia
  • Poland
  • Germany



Values - Aspirations

  • Quality
  • Reliability
  • Efficiency
  • Human relations
  • Team work - with engineering and human aspects

        Commitment in the frontline.



     Office address:

    ENSI Kft.

    Groupama Aréna (Fradi-stadion)
    Üllői út 129., I. emelet

    H - 1091

    Phone: +36 1 248-2199
    Fax     : +36 1 248-2190

    Direct e-mail: Click here!



       Ensi Kft. - Quality Assurance Systems: MSZ EN ISO 9001:2015  and  MSZ EN ISO 14001:2015 - Valid until 2023-11-15

       Innovative solutions: HVAC systems for cleaning room technology, environment-orientated and energy-saving HVAC systems implementing

       All that is HVAC: Cooling, heating, ventilation, air conditioning, compressed air, water, canal, gas, fire water, rain water systems, fire protection, sprinkler system,

     HVAC insulation, builiding automation.

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