Menu DE Deutsch
Contact
Close DE Deutsch
Back
DE Deutsch
Home / Business Areas / Technics & Industry / Hot Water Tanks

Highest Energy Efficiency Classes for Hot Water Tanks

Much of the energy that has become so valuable today is used for heating and hot water in buildings. However, due to poorly insulated storage tanks and pipes, a lot of energy can be lost even before it’s used. For some years now, all hot water tanks with a capacity of up to 2,000 litres have been classified from classes A+ to C on the EU label.

These classifications represent the heat loss of the storage tank. Due to the global energy and climate crises, the EU is planning further energy efficiency tightening in 2025. In preparation for this, manufacturers can take advantage of va-Q-pro technology. In comparison with conventional insulation, the energy saving potential with the vacuum insulation is around 30 %, as shown below:

Advantages of va-Q-pro technology

Achieving the highest energy efficiency classes by reducing heat loss
Up to 90% tank surface coverage with a combination of va-Q-plus and customized va-Q-pro panels
High-performance insulation of the endcaps by circular panels as well as in the areas of connections, flanges and other assembly parts by panels with cut-outs
No client-side product or process changes required due to adaptation to the existing tank design
How do va-Q-tec solutions support compliance with the EU Ecodesign Directive (ErP)?

By reducing heat loss by around 30% compared with standard insulation materials, manufacturers can position their storage units in energy efficiency classes A and A+ through the use of vacuum panels.

Can large-capacity storage units still be transported through standard doors despite highly efficient insulation?

Yes. The va-Q-shell system is designed to be detachable, meaning that a 750-litre tank, for example, fits easily through standard doors.

How are critical areas such as connections, flanges or storage caps insulated?

The front sides are protected by circular panels. For connections, there are custom-made panels with precise cut-outs, enabling surface coverage of up to 90% to be achieved.

What specific effect does vacuum insulation have on power loss?

A 750-litre storage tank, such as the AquaSOLAR+ model, achieves a heat loss of just around 46 watts thanks to the use of VIPs, which is almost 10% below the threshold for Class A+.

Does the use of VIPs require adjustments to existing manufacturing processes?

Not usually, as the panels are adapted to the existing design of the customer’s storage facility.

Can the technology also be used for other thermal storage systems?

Yes. It is not only suitable for hot-water storage tanks, but also for optimising boilers and heat pumps.