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How does ratiotherm improve any heating system?

1. Approach

Due to modern building technologies, the requirement for heat in residential buildings is constantly going down (redeveloped old building, 6-12 kW; new builds, 5-3 kW or less).

This results in traditional heating systems (oil/gas/wood/and biomass-fuelled) producing more heat on most days than is actually needed in the heating systems.

This excess energy usually gets wasted, i.e. is not put to good use.

2. Approach

The use of alternative regenerative energy sources, such as solar power is continually on the increase.
However, the following main issues arise :
the sun varies extremely in its output (extremely varied temperatures, depending on the period of sunshine and its intensity); the discrepancy between the current energy offered and the energy needed is very large in this respect (there is no need for heat when there are high temperatures oitside)

Our solution is

Good times - bad times

OSKAR stores energy for hard times


and provides for fresh hot water.


Regardless of where the heat comes from

and what temperature it is OSKAR will store it like a battery.
The respective energy is thereby layered into the appropriate temperature zone according to its temperature.
The energy source is the available heating water, which because of OSKAR has a considerably larger volume.

The principle: 40 degree hot water from the "clouded" solar collectors is fed into the 40 degree zone layer,

without mixing with the 70 degree hot water layer from the day of sun before and cooling it down.

Naturally, this principle applies with OSKAR not only for solar systems, but also for wood-burning stoves, solid fuel appliances, pellet boilers, heat pumps, combined heat and power stations, and oil/gas boilers, etc.

OSKAR enables each heat generator to reach its ideal operating state, because OSKAR stores these energies nearly practically without any loss in the respective temperature layers until they can be used in a meaningful manner.

Whether old building or new,

wood, oil, gas or condensing boiler, heat pump, combined heat and power station or solar power, OSKAR can optimise any central heating system; the system and make of your equipment is of secondary importance.

Even the existing control system will remain.

OSKAR combines the heat supply and heat discharge from the individual structural elements to make up a meaningful whole with its stratified system.

The connection and combination options are conceivably simple and only standard named components are used.

Heating burners only (mainly) know two operating conditions:

full blast or idle.

If full power is not needed, which is the case on around 250 days a year, the burner begins to clock; i.e. it starts up, only to switch off again shortly thereafter.

This means around 30,000 start-ups and just as many stopping processes each year. In both operating conditions, starting-up and stopping, burners consume energy pointlessly generating a lot of pollutants, similar to a cold start-up of a car.

OSKAR reduces the burner cycles by around 70%, thereby reducing the pollutant emissions by around 50%.

OSKAR even makes gains from the sun

OSKAR improves the efficiency of traditional solar systems by 100%.

The principle: OSKAR uses the energy from intense sunny days and stores it in the "hot"layer so that energy is available for domestic hot water heating any time.

However, even on days when the weather is not as good OSKAR still converts every ray of sun into useable energy which is then stored in the relevant temperature layer.

In contrast to other solar storage tanks, OSKAR not only uses solar heat for domestic hot water heating, but also for room heating in the transitional period, as well as for raising the return flow temperature from the heating circuits in winter.

OSKAR replaces expensive burner energy with solar heat thus doubling the efficiency of the solar systems.

Using and saving any energy supply until you use it - this is how ratiotherm technology makes solar systems pay for themselves.