We take care of everything – from management and customer contact to technical and financial processes – so that you can focus on your core activities.
Organisations often face major challenges in managing and maintaining the performance of collective or sustainable energy systems. These challenges stem from a lack of internal technical, financial or administrative capacity, the increasing complexity of energy infrastructure and regulations, and the constant need to strike a balance between efficiency and satisfaction. Without specialised expertise, systems can become inefficient, expensive and unreliable, leading to financial risks and frequent complaints.
Professional management via istaDES combines all crucial tasks in one comprehensive service. From technical and financial management to contract management, advance payments, billing, customer contact and smart consumption monitoring. This integrated approach increases performance, reduces costs, extends the life of the system and increases transparency. For managers of commercial and industrial property, this means greater efficiency and certainty in compliance, while users benefit from convenience and reliable service.
Please contact us and our specialists will be happy to advise you on the best solution for your buildings.
istaDES works with an independent heating company for the B2C model. For the B2B model via an ESCO, ista works with reputable partners. This gives you flexibility in your choice to bill your users' heat consumption according to tenancy law or the Heat Act. The heat tariffs are determined annually in consultation with you, the heating company and ista. This gives users the certainty that they will not pay too much and gives you the opportunity to invest in sustainability measures.
The services we provide to commercial and industrial property managers take the hassle out of operating sustainable heating systems. This allows you to focus on your core business, namely letting properties. The combination of our services and our collaboration with the heating company sets us apart from other heating companies. Our expertise lies in providing technical and financial services related to heating installations and the correct distribution of operating costs between property managers and users.

istaDES' services have been developed based on the wishes and needs of the market. Installations are becoming more complex, measuring systems smarter, and data collection and climate measures increasingly important. This leads to higher quality requirements and broader expectations from customers. istaDES supports you in all aspects of heat exploitation with specialist knowledge. From technical management and financial returns to customer service and legal aspects of collective energy installations.
The technical management of your (sustainable) energy installation is in good hands with istaDES.
Whether it concerns assessing and monitoring energy performance (based on the ReduQ energy monitoring tool), preventive maintenance or malfunctions. Together with your installer, we carefully map out your energy installation and determine its technical efficiency.
In addition, we formulate a long-term perspective on maintaining the energy installation. Your installer handles complaints and malfunctions, with istaDES continuously looking over their shoulder. The technical manager at istaDES is a fully-fledged discussion partner for the installer. The technical efficiency is also periodically mapped out and discussed with the client. Advice is also given on improving the technical performance of the energy installation.
We take care of all contractual matters for energy consumers and ensure that agreements are fulfilled in a clear, fair and sustainable manner.
istaDES also takes care of cash management for you. From collecting advance payments from users and making payments to the energy supplier to settling accounts with users.
The ReduQ energy monitoring tool gives you complete insight into the performance of your energy installation. Your users have access to the Mijn.ista monitoring tool to gain insight into their energy consumption.
If you have any questions or complaints/malfunctions, we will respond quickly and professionally, giving you personal attention and the assurance that your concerns are being taken seriously.
Before management of the communal installation can commence, istaDES determines its status by means of a readout. The (communal) installation must meet a number of criteria before management can be taken over. After completion of the readout phase, you will receive a readout report for each location.
The defects or shortcomings identified during the import process must be rectified. The supervision or implementation of this clean-up process is carried out under the direction of istaDES.
After completion of phases 1 and 2, the management phase begins. During the management phase, it becomes clear whether the energy installation is financially and technically profitable. If the return on investment is insufficient, istaDES advises on possible improvements to the energy installation in order to increase returns.

For a complete understanding of how your energy installation works and to ensure that the heat supply is properly matched to the heat demand. The tool that can lead to significant energy savings.
As an independent service provider, we take care of the operation and sustainable management of your energy installation in collaboration with various heating companies and maintenance parties.
Heat Company is a heating company that specialises in supplying sustainable heat.
Warmtelevering Wonen Limburg is the heat supplier for the Wonen Limburg housing association.
Four Energy is an energy supplier of sustainable heating and cooling to consumers and businesses throughout the Netherlands.
Complete package without any worries – All technical, contractual, and administrative tasks are handled professionally, so no additional internal effort is required.
Greater efficiency & lower costs – Targeted monitoring and professional maintenance reduce operating costs and increase the service life of installations.
Satisfied residents – Fast and expert support for questions, complaints or malfunctions ensures trust and a higher quality of living.
Complete transparency – With clear reports and transparent processes, owners and managers always maintain control over performance and finances.
Future-proof – Management ensures that installations always comply with current legislation and regulations and are ready for sustainable energy solutions.
Please contact us and our specialists will be happy to advise you on the best solution for your buildings.
QuaWonen relies on ista for smart energy management in 15 complexes – with lower costs, fewer disruptions and a step towards sustainability.
Elan Wonen entrusts the energy management of 17 complexes to ista, thereby gaining greater insight, lower costs and control over sustainability.
By managing 44 systems with istaDES, Wonen Limburg is able to control performance, malfunctions and costs, and improve comfort and energy efficiency in a sustainable manner.
istaDES Brochure (dutch)
PDF - 751 KB
ista Dienstverleningsbrochure (dutch)
PDF - 2 MB
Our bespoke solutions are designed to help our customers reduce their environmental impact, improve health and safety in their buildings, and save energy costs.
For a complete understanding of the energy system's performance.