Net Zero partnership with ASVZ

ASVZ is one of the Netherlands’ leading care organisations, providing housing, support and treatment for people with intellectual disabilities. The organisation operates a large number of residential units, treatment centres and support facilities across the country. Many of them are located in sensitive environments where stability, comfort and safety are critical.

To meet its long-term sustainability targets, ASVZ committed to phasing out gas heating in all buildings. After a competitive tender, Energy Save was selected together with installer Greenhill to deliver a large-scale heat pump transition programme running from Q4 2024 to 2030.

The project combines commercial and residential air-to-water systems, integrated through the NordFlex Controller platform, adapted specifically to ASVZ’s operational, medical and compliance requirements.

ASVZ’s facilities differ from traditional residential or commercial buildings. Many houses and units accommodate residents who are highly sensitive to noise, rapid temperature changes and disruptions during installation or maintenance.

In addition, ASVZ must adhere to strict hygiene and water safety standards, including a rigorous anti-legionella compliance level. Any heating system must guarantee reliable hot-water production, stable temperatures and predictable operation.

The organisation also faces the challenge of reducing peak electricity consumption, especially during high-demand hours, in order to stay within existing mains infrastructure.

These combined factors shaped the technical and operational framework for the tender.

Energy Save won the bid by demonstrating the ability to meet the customer’s most demanding requirements:

A scheduling strategy that reduces operation during peak load hours, with clear documentation for the Building Energy Management System (BEMS) integrator. This enables real-time control, stability and predictable power use across all sites.

A combination of commercial and residential outdoor units ensures:

This approach is essential in environments where residents are sensitive to change and disturbance.

All installations incorporate detailed metering of loads and production, providing ASVZ and Greenhill with full visibility for monitoring, optimisation and reporting.

The system design fully supports ASVZ’s ambitious anti-legionella standards, securing reliable domestic hot water production throughout the year.

The project includes the deployment of both commercial and residential air-to-water heat pumps across multiple ASVZ sites, connected and managed via the ES NordFlex controller platform.

Key design principles include:

The flexibility of NordFlex allows installers to define operating schedules, set temperature corridors, and adjust performance in response to both patient needs and energy system constraints.

By phasing out gas, ASVZ strengthens its commitment to sustainable operations while improving everyday comfort for residents and staff. The solution provides:

The multi-year timeline reflects ASVZ’s ambition to transform its heating infrastructure in a controlled, stable and predictable way. Together with Greenhill, Energy Save will continue to support installation, optimisation and monitoring throughout the roll-out.

This project demonstrates how a large care provider can take meaningful steps toward net zero without compromising on comfort, safety or operational reliability.

By combining flexible product architecture with advanced control solutions, Energy Save enables a heating transition tailored to the real needs of healthcare environments.

ASVZ – Dutch care organisation for people with intellectual disabilities

Greenhill

Q4 2024–2030

Commercial and residential outdoor units, ES NordFlex controller platform