About Sommerauer

Establishment 1991

Lindner & Sommerauer was founded in 1991 by Hermann Lindner and Christian Sommerauer to manufacture biomass boilers. They are based in Upper Austria, the European centre of excellence for wood heating systems, and are one of Europe’s leading biomass boiler manufacturers.

Lindner & Sommerauer factory

They run the company under a firm ethos of creating environmentally friendly technology that works in harmony with nature. The result is high-efficiency biomass boilers built by dedicated and committed experts. 

Technical Excellence

Over twenty years’ experience has enabled Lindner & Sommerauer to develop some of the most advanced wood chip and wood pellet biomass boiler heating systems on the market.

All Lindner and Sommerauer biomass boilers are fitted with an electronic touch screen control panel. This gives the boiler’s user access to vital performance information and puts them in control of all key functions such as timers, thermostats, heat outputs and boiler efficiencies.


 Rainbow Heat and Power are awarded the exclusive UK distribution for Sommerauer biomass boilers (then called Lindner & Sommerauer). After extensive testing of the boilers and thorough installer training, Rainbow Heart and Power began installing the Sommerauer range in the UK during the 2013 heating season.

Hot stuff - Find out how the latest biomass boiler on the market puts you in control of your heating needs and saves you money

There are already thousands Sommerauer systems heating homes and businesses in Europe, some closer to home which you can see on our case studies page. If you would like to see an operational one for yourself, get in touch, we're here to help.


In March, Sommerauer accept a prestiguous and highly sought-after Austrian award for Innovations in the field of biomass heating from Andrae Rupprechester, the current Austrian Environment Minister. 

Andrae Rupprechester

Andrae Rupprechester is pictured above left, Hermann Lindner, is pictured above right and Christian Sommerauer is pictured middle above accepting their award in March this year.

During Spring 2014, the establishment of Wye Valley Energy began and the partnership with Rainbow Heat and Power was set up. Wye Valley Energy will act as local installation partners for Rainbow Heat and Power and for Sommerauer.

Wye Valley Energy office

A 50kW Lindner & Sommerauer SL 50 wood chip boiler was installed and commissioned into Wye Valley Energy's HQ at Humber Court Farm. Please contact us to view our hard-working system which is run on wood sourced from the farm's woodland.