Stratified storage tanks
Stratified storage tanks store heating heat in different temperature zones and make it available to the heating system as needed. They are suitable for systems where heat from wood heating, heat pumps, solar thermal systems, or combined heat generators is to be used as efficiently as possible.
In the GEMA Shop you will find stratified storage tanks for various system concepts, tank sizes, and areas of application – suitable for renovation, new construction, heating modernization, and the hydraulic integration of modern heating systems.
Notes
Use the filters to narrow down the selection by relevant properties such as manufacturer, product type, area of application, technical features, or availability. The information is provided for orientation purposes and does not replace a check of the technical suitability, compatibility, or proper use of the product.
Choosing the right stratified storage tank
Stratified storage tanks are special thermal storage units for water-based heating systems. They do not store heating water as a single uniform volume but support temperature-dependent stratification within the tank. Warm water remains as much as possible in the upper part of the tank, while colder water stays in the lower part. This allows the stored heat to be used more specifically depending on the system design.
This storage technology is particularly interesting for heating systems with multiple heat sources or varying operating conditions. These include, for example, wood heating, pellet boilers, heat pumps, solar thermal systems, or combined systems. It is crucial that the tank size, connections, temperature ranges, and hydraulic integration match the respective heat generator and the building.
Advantages of stratified storage tanks
- Better use of temperature zones: Different temperature ranges in the tank can be made available more specifically for heating and domestic hot water preparation.
- Sensible system integration: Stratified storage tanks can integrate multiple heat generators and heating circuits into a system design.
- Suitable for modern heating systems: Depending on the design, wood heating, heat pumps, or solar thermal systems can be supported.
- Structured selection: Storage tanks can be compared by volume, storage type, insulation, heat exchangers, and system compatibility.
Areas of application and target groups
Stratified storage tanks are suitable for homeowners, self-builders, buyers with a background in sanitary, heating, and air-conditioning technology, and technically interested end customers who are planning, expanding, or modernizing a heating system. Typical areas of application include single-family homes, renovations, new builds, wood heating systems, heat pump systems, solar thermal systems, and combined heating systems with multiple heat sources.
Important selection criteria for stratified storage tanks
When selecting, particular attention should be paid to storage volume, storage type, number of heat exchangers, insulation, maximum temperature, maximum operating pressure, material, connection options, and suitability for specific heat generators. For further system planning, additional buffer tanks, storage technology, solar storage tanks or suitable Heating accessories & system technology be relevant.
Note on professional sizing
The selection of a stratified storage tank must match the heat generator, the heating load, the domestic hot water demand, the system hydraulics, and the desired operating behavior. Information on volume, application area, or system compatibility is for orientation only and does not replace professional system planning.
Frequently asked questions about stratified storage tanks
What is a stratified storage tank?
A stratified storage tank is a heat storage tank that stores heating water in different temperature zones. This allows warm and cooler stored energy to be used more selectively.
What is the difference between a stratified storage tank and a buffer tank?
A buffer tank stores heating water in general. A stratified storage tank is designed to keep temperature zones in the tank as stable as possible and thereby provide heat more according to demand.
Which heating systems are stratified storage tanks suitable for?
Depending on the design, stratified storage tanks can be used with wood heating systems, pellet boilers, heat pumps, solar thermal systems, or combined heating systems.
Can a stratified storage tank be combined with solar thermal systems?
Yes, depending on the tank design and hydraulics, a stratified storage tank can absorb solar thermal heat. For this, the heat exchangers, connections, and controls must match the system concept.
What size should a stratified storage tank be?
The right storage tank size depends on the heat generator, heating load, hot water demand, user behavior, and system hydraulics. A blanket selection based solely on living space is not sufficient.
What should I look for when comparing stratified storage tanks?
Important factors are storage volume, connections, insulation, number of heat exchangers, maximum temperature, operating pressure, material, and suitability for the planned heat generator.
Does a stratified storage tank replace heating system planning?
No. A stratified storage tank is an important system component, but it does not replace proper planning. Hydraulics, tank size, safety equipment, and heat generator must be appropriately sized.