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ETA 
Log and combination boiler

Whether you are building a new home, renovating your existing home, or dealing with an old or new building – we have the perfect model for your needs! For single-family homes, we offer four different log and combination boilers. Together with your heating technician, you can choose the ideal solution that perfectly suits your home and your requirements.

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Log wood

ETA eSH

The log boiler with automatic ignition is convenient and independent. If needed, it can be retrofitted with the eTWIN pellet burner for even more flexibility.

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Log wood, Pellets

ETA eSH-eTWIN

Flexible heating with logs and pellets: the eSH log boiler provides base heat, whilst the eTWIN pellet boiler automatically takes over when no more wood is added.

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Log wood

ETA SH

Efficient heating with firewood. Adding fuel once a day is enough to maintain reliable warmth – even on cold days. A pellet boiler can optionally be added later.

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Log wood, Pellets

ETA SH- TWIN

Flexible heating with logs and pellets: If the wood runs out, the automatic pellet operation reliably provides heat.

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Woodchips

ETA HACK VR

Efficient and robust: The ETA wood chip boiler HACK VR 250 - 500 kW heats larger buildings with regional wood chips or pellets.

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ETA 
Components

The right system for each situation
No two heating system are alike. Different requirements such as the integration of solar systems, the connection of multiple buffer storage tanks or the separation of heating circuits have so far required a high level of planning – often without standardised solutions for regulation and control. The implementation, especially the cabling, was quite complex. Therefore, ETA has developed modular components that can be flexibly combined to create an well-coordinated overall system. This allows heating solutions to be individually tailored to your specific circumstances together with the fitter or heating engineer – the right system for every situation.

ETA

Buffer storage tank, ECO 500

The little money-saving champion! The ETA ECO 500 buffer storage – the clever and cost-effective solution for small systems with limited space.

The little money-saving champion!
With the ECO model, ETA has developed a buffer storage tank that is very affordable and ideal for anyone who has a small system and little space in the boiler room. It's ready-made with insulation and an optimum number of connections. The compact tank fits through any door and is quick to set up. Ideally, it is complemented with the ETA fresh water module, which saves space and ensures hygienic hot water at all times.

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ETA

SP-PLUS stratified buffer storage tank

The right temperature layer by layer! The ETA stratified buffer storage tank increases efficiency and reduces operating costs.

The buffer storage tank – the heart of heat distribution
Heat is stored here, which in turn can be accessed at any time if more energy is needed. So the buffer storage tank evens out peak and reduced loads and thus ensures a uniform and more efficient operation of the heating system and also a longer lifetime of the boiler. A well-adjusted stratified buffer significantly enhances comfort as well.

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ETA

SPS-PLUS stratified buffer storage tank

Sophisticated technology and efficient operation: The ETA SPS stratified buffer storage tank optimally turns solar energy into sustainable heat with a system.

Efficient heat storage using solar power
As a central element in the heating system, the stratified buffer storage tank plays a key role: In addition to absorbing energy from biomass, it also absorbs the heat generated by the solar thermal system and makes it available as needed – for hot water preparation as well as for heating support. This enables intelligent utilisation of energy surpluses, balances load fluctuations, and protects the boiler. This ensures not only consistent and economical operation but also significantly enhances living comfort—sustainably and efficiently.

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Fresh water module

Always hygienic, always fresh! Hot drinking water – always cleanly prepared.

Always hygienic, always fresh
The fresh water module ensures that the buffer storage tank is used even more efficiently. When hot water is needed in the house, the fresh water module kicks in: using the instantaneous water heater principle, it heats fresh cold water as needed and hygienically – exactly when it is required. For maximum comfort and consistently clean hot water.

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Stratified charging module

The stratified charging module ensures that the energy from a solar power system is used optimally in combination with a buffer storage tank.

Optimally harnessing the power of the sun:
The perfect stratification of solar heat into the buffer storage tank is made possible by the stratified charging module. This ensures optimal use of solar thermal energy for hot water preparation and heating support. For example in the morning when the sun is weak, the module supplies the lower half of the buffer. Once the sun is sufficiently strong to heat the upper, warmer buffer strata, the system switches to the upper half.

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System separation module

The system separation module separates heating systems, for example heating water and antifreeze solution

Clean separation for safe systems
Whenever heating circuits need to be separated, the ETA system separation module is used – for example, to separate residential heating from frost-protected areas such as workshops, stables or open areas. Separation also protects against damage in old underfloor heating systems or stable heating systems that introduce oxygen or pollutants into the system. The media are reliably separated from each other using a plate heat exchanger – similar to solar thermal systems.

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Mixing circuit module

The heating circuit module is a fully wired system for two heating circuits.

Heat distribution has never been easier: plug it in, and you're done!
This is how quickly a whole system can be installed: you've got your heat distribution under control with just a plug and a data cable. The ETA heating circuit module is suitable for all types of heat distribution - i.e., underfloor, wall and/or radiator heating as well as fan heaters.

The ETA heating circuit module for 2 mixing heating circuits saves a lot of time and money during installation, because there is no need to lay sensor lines, pump and mixing cables. All components are connected to the already integrated control system.

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ETA 
Fuel calculator

Fuels in comparison
While the price of fossil fuels such as oil and gas is subject to heavy fluctuations in the international markets and will certainly rise in the long-term, the price of wood and pellets is stable. Calculate your heating costs with our fuel calculator.

Switching systems is worthwhile
Looking back 15 years – discover how much you could have saved by switching!

ETA Reviews
What our partners & customers say

Hello, I installed an ETA PU 15 and it has been running perfectly since February 2025. What I would particularly like to praise is the customer service. I have never experienced customer service with this level of accessibility, competence and friendliness. Many thanks to Mr. Rammelmüller for your exceptional and perfect service. I'd give you 10 out of 5 stars :-) I'll happily recommend your products to my friends and acquaintances.

Ernst Siebein on Google

The first step is to call an engineer. He was able to help me immediately, in an easy-to-understand way. The next day I picked up a replacement part from the company. They immediately took care of me and explained everything to me. Mr. Chr. The spare parts department is more than competent and friendly! I (a trained plumber) can highly recommend this company!

Cactus Maximus on Google

Excellent customer service! After the pellet heating system started acting up for the first time in 12 years (right on New Year's Eve), customer service was contacted on 2nd January and the engineer was already at the door two and a half hours later and was able to fix the problem. This is how you ensure satisfied customers 👍👍

Klaus Zimmermann on Google

I've had the (bulk) heating system since 2009 and I'm very satisfied. Very good products.

Stefan Kaiser on Google

Ideas for your boiler room

Choosing a new heating system is a decision that will shape your home for many years to come. It should not only be efficient and sustainable, but also bring you long-term enjoyment. To ensure you make the right choice, we invite you to take a look at our reference projects. Explore our fully installed heating solutions and get some inspiration. Here you can see what your future boiler room could look like – individual, well-thought-out and perfectly tailored to your needs.

Search for reference projects

Single-family house
ETA eSH 26 kW
Mittl Johannes
85123 Karlskron
Germany
Single-family house
ETA SH 40 kW
Private customer Epse
8161 Epse
Netherlands
Single-family house
ETA SH 20 kW
Erwin Buchholz
78730 Lauterbach
Germany
Single-family house
ETA SH- TWIN 30/26 kW
Schwer family
78132 Hornberg
Germany
Single-family house
ETA SH- TWIN 30/26 kW
Andreas Neininger
78052 VS-Herzogenweiler
Germany
Single-family house
ETA SH- TWIN
Lautenschläger family
74423 Herlebach
Germany
Single-family house
ETA SH 40 kW
Private customer
91560 Heilsbronn-Weißenbronn
Germany
Single-family house
ETA SH- TWIN 20 kW
Private customer
90513 Weiherhof-Zirndorf
Germany
Single-family house
ETA SH- TWIN 30/26 kW
Private customer
91744 Weiltingen
Germany
Single-family house
ETA SH- TWIN 20/20 kW
Private customer
06618 Naumburg
Germany