The GACS deadline has passed. Now what?

Everything you need to know about the requirement, the risks, and the fastest path to compliance.

What is GACS?

GACS stands for Building Automation and Control System. It is a system that automatically monitors, analyzes, and adjusts the technical installations in your building—heating, cooling, ventilation, lighting.

The goal: less energy waste, better insight, and smarter maintenance. The reason: European legislation (EPBD) that the Netherlands has been required to transpose into national rules.

Concretely, GACS means your system must be able to:

→ Continuously measure and analyze energy consumption
→ Detect performance losses in installations
→ Automatically communicate with other systems in the building
→ Inform the manager about opportunities for improvement

Who does it apply to?

Since January 1, 2026: all non-residential buildings (offices, schools, stores, healthcare buildings, warehouses, hotels) with a heating or cooling system from 290 kW nominal capacity.

From January 1, 2030: the same requirement, but starting at 70 kW. That affects a much larger group — think medium-sized offices, practices, small and medium-sized commercial properties.

Homes are not included. But note: if your property has a mixed use (part residential, part commercial), it may still apply.

What if you don't comply? First a warning. Then a fine. In the most extreme case: revocation of the operating permit. Enforcement is handled by the Environmental Service.

What can you do now?

Step 1: Check whether your property falls under the requirement. Above 290 kW? Then you must comply now. Between 70–290 kW? Then you have until 2030, but it's smart to start now.

Step 2: Have a quick scan done. In 10 minutes you'll know where you stand. Mithra offers this for free — no obligations.

Step 3: Implement the right monitoring. With non-invasive IoT sensors, you can be compliant within a day. No renovation, no downtime, no cables.

The GACS requirement doesn't have to be a burden. It's actually an excuse to finally get a grip on your energy consumption — and save money on it right away.