Buffer Tanks
Buffer tanks store surplus heat (for example from a solid fuel boiler or a solar system) for later use – available in various volumes according to the size of the system.
We will gladly advise you on both selection and installation – write to us using the contact form or by e-mail.
Would you like to learn more? Take a look at our Knowledge Centre – Buffer Tanks with expert guides and advice.
Bestsellers
Product sorting
List of products
Listing controls
Buffer tanks, vessels and cylinders for heating, connected to boilers
Buffer tanks are used to store hot water. They are used wherever the heat source is variable, for example with wood gasification boilers, solar energy, or heat pumps. Their advantage is that they can "store" heat and then use it later for heating or hot water preparation when needed. A suitable heat source can be a solid fuel boiler, a heat pump, solar collectors, or even a fireplace insert. Buffer tanks are manufactured in three variants. The ZG type from 850 L to 3000 L is simply a plain vessel for heating water. The ZGI type from 850 L to 3000 L has one heating coil, and the ZGIB type from 850 L to 2200 L has one coil plus a built-in 200 L domestic hot water tank. Insulation for buffer tanks is made from 100 mm polyurethane foam covered with polyester fabric. The insulation is supplied separately and must be ordered separately.
Frequently Asked Questions
- What is a buffer tank used for? It stores surplus heat from a boiler, heat pump or solar collectors and releases it later when heating or hot water is needed.
- What is the difference between the ZG, ZGI and ZGIB types? ZG is a plain vessel without a coil, ZGI has one heating coil, and ZGIB has a coil plus a built-in 200 l tank for domestic hot water.
- Is the tank insulation included in the package? No, the insulation is supplied and ordered separately.

