The Use of solar energy is becoming increasingly important
The easy combination of the ROTEX A1 with solar energy recovery was therefore taken into consideration during the development. The ROTEX A1 condensing boiler can be directly combined with the ROTEX Solaris solar system. In this system, solar energy is used both for water heating and heating support.
This extensive use of solar energy guarantees additional energy saving and therefore a highly favourable assessment in the context of the German energy saving ordinance (EnEV).
The ROTEX Sanicube solar storage tank is characterised by resistance to corrosion and optimum water hygiene (tested by Tübingen University).
Doubly regenerative: Bio-oil and solar
In order to cover the annual heating requirements, the proportion of regenerative energy can once again be considerably increased by combining the ROTEX A1 BO 15bio with ROTEX Solaris. During the summer months heating requirements can be covered regeneratively to a great extent. In the case of a solar system with heating support, there is also significant proportion during the transitional period. An annual average regenerative energy use of up to 56 % can be achieved for an average single-family home.
The diagram shows the monthly energy consumption of an average single-family home.
It compares two system types:
- Grey: represents energy consumption using an old boiler
- Blue: system with an condensing oil boiler
- Yellow: sollar energy use for hot water and heating
- Green: bio-oil mix of 20%
In this example, the yearly CO2 emissions are reduced from approx. 7.6 t (with an old heating system) to approx. 3.0 t with a ROTEX system using the A1 BO 15bio and ROTEX Solaris (e.g. SCS 538/16/0 with 4 solar panels). This corresponds to a reduction in the CO2 emissions by approx. 4,600 kg per year for a single-family home.