We are
De Duurzame Oplossing
A technology company of physicists and engineers. We keep sustainability knowledge current and accessible, so you don't have to build and maintain it yourself. That leaves you free to respond to change and to make the most of the expertise you already have.
Our expertise
Our strength is in the combination: knowledge, data, context, methodology and calculation tools. We supply the data and the expertise, so your organization can get straight to work.

Four areas of expertise work together here:
- Physics and simulation: building simulation for Dutch homes, with Dutch materials and Dutch weather data. Calculated dynamically across 8,760 hours a year, so heat behaves in the model the way it does in practice.
- Behavior and validation: when people shower, how they heat their homes, which appliances they use: that determines a large part of actual consumption. So we test our calculations against theory and against real behavior.
- Economics and forecasting: what a kWh costs today, what it cost five years ago and where it is heading. That turns a saving in kWh into an amount per year, and into a soundly based financing arrangement.
- Software and methodology: domain knowledge and engineering sit in one team here. That makes the knowledge reachable through whichever way of working suits your organization, whether that is an assistant or a link to your own systems.
What sets us apart is not any one of these areas on its own, but the way they connect. See how it works for the methodology behind these four layers.
Our added value
Four things you can expect from us.
Scientifically grounded
Validated models, current data and hands-on experience.
Fully tailored to the Netherlands
Regulations, market data and energy prices fully integrated.
Strong in communication and behavior
Effective framing that gets people moving.
From insight to action
From calculation and simulation to personal advice.
Collaboration and team
Our ambition is to generate the knowledge and skill for well-founded choices that reduce energy demand. We work on that with partners and with our multidisciplinary team. That gives us everything we need not only to develop software, but also to make complex insights about sustainability directly available.

We connect to your ambition and translate your question into concrete solutions. That makes knowledge understandable and scalable for organizations that want to move forward. You can plug in through three channels: collaboration, integration and consultancy.
“At De Duurzame Oplossing we believe in activating people, businesses and governments to make living, housing and working more sustainable.”
Director
Want to work with us?
We are looking for physicists, engineers and people who make complex material understandable.
See our vacancies