Assess quality.
With supporting evidence.

A quality label with a clear scope

This document concerns the metal PB series. It is not general certification of the entire Welltherm range or other brands we supply. For glass, a project heater, a thermostat or an accessory, we review documentation for that specific version.

Radiant performance is different from annual consumption

Radiant efficiency describes how much of the supplied energy is emitted as thermal radiation under specific measurement conditions. Such a product measurement does not provide a fixed savings percentage for your home or commercial building. Heat loss, desired temperature, operating time and selected controls remain decisive in practice.

We therefore connect product comparisons to a heating plan: what power is required, where will the panel be placed and how will the room be controlled? This lets the documentation support an informed choice.

What do the other markings mean?

CE is the conformity marking for applicable European requirements. GS relates to tested product safety. TÜV refers to a testing or certification organisation. ISO 9001 concerns quality management within an organisation. Their meanings and product scopes differ; the corresponding documents provide details.

The ISO 9001 document available on Welltherm.nl states validity until 5 April 2026. That version has expired, so we do not use it as evidence of current certification. Ask us about available documentation for your product or project.

From product evidence to project confidence

For an installer, the model code, mounting requirements and suitable controls are important starting points. As a private customer, you mainly want to know which version suits your room. In both cases, we look beyond the label: the composition and use of the installation must also be right.