Renewable Energy Heating Systems
Domestic Hot Water Heating Find out more
Oskar° Stratified Storage Tank with Add-on Modules Find out more
Solar Thermal Energy Find out more
Refining Natural Power
Smart Energy (PV) Find out more
WP Max Heat Pumps Find out more
Oskar° is award-winning:
Best Product 2015/2016 Find out more

The profession became a vocation!

Experience and quality, successfully combined

ratiotherm employs more than 20 people in the tranquil Upper Bavarian town of Dollnstein, idyllically located in the Altmühltal Nature Park. From there, state-of-the-art heating technology finds its way to half of Europe: 150 companies in Germany, and another 50 in Spain, France, Italy, Austria, Switzerland and Benelux, are official business partners of the Upper Bavarians.  Since 1994, the patented Oskar° stratified storage tanks have been manufactured in the company’s own 3,500-square-metre plant in Dollnstein. In addition to the pioneering spirit of innovation, the local in-house production operation is the second pillar of ratiotherm’s corporate philosophy.  The flagship product, Oskar°, is an intelligent energy manager that, thanks to its patented coating system, organises the heat in each heating system so efficiently that it can save up to 30% and more on energy costs. The Oskar° stratified storage tank has been causing a sensation in the market for many years with its recipe for success, ‘Maximum possible saving of heating costs with minimal control expense’, exemplifying the core competence of ratiotherm: Only the intelligent storage of energy ensures the true efficiency of a heating system! 



But ratiotherm refused to lose sight not only of heat storage but of heat generation as well. In 2003, for instance, the Upper Bavarian thermal specialists teamed up with the Ingolstadt University of Applied Sciences to develop the Oskar° Max-Sol² hybrid heat pump. Its sophisticated design makes it possible to use temperatures from a solar thermal system of under e.g. 40 °C, a feat that most classic solar thermal systems have thus far failed to achieve. Since mid-2015, ratiotherm – at the company’s location in Dollnstein, of course – has also been producing its own collector series for both sloped and flat roof systems. With its new range of collectors, ratiotherm can now offer its business partners all the components of an efficient heating system – from the solar thermal collector to the stratified storage tank through to intelligent control.



As standstill would mean a step backwards, in January 2016 ratiotherm integrated its new ‘ratioplan’ business area. In future, the firm from Dollnstein will thus offer the market comprehensive, energy-efficient heating concepts. The focus here is on solutions for sustainable heat networks in municipalities, communities or industry. The active team of the Competence Department is now giving ratioplan the right momentum for its growth theme: ‘Regenerative heating grids for the municipal and commercial sector’. The first ratiotherm lighthouse project can be found – logically enough – locally, in Dollnstein. An approach to be implemented throughout Germany over the next ten to fifteen years has already become a reality here: An intelligent heat supply through a district heating network, variably and exclusively delivering only the heat customers actually require. No wonder that this project was recognised by the Bavarian Environmental Network KUMAS as an ‘ecological lead project 2015’. The jury’s rationale: ‘Convincing role model for municipal heating supply in Germany.’ With its pioneering spirit, ratiotherm continues to set standards in the German heating market.