| DeltaSol®/DeltaTherm® | Biomass/SFB | Solar thermal | Heating circuit(s) | Electric immersion heaters | Heat pump demand/control | Optional functions | 
|---|---|---|---|---|---|---|
| FK | ![]()  | 
                    - | - | - | ![]()  | 
                    - | 
| CS Plus, SLL, SL, BX |   + Ret. mixer (with EM Extension module)  | 
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                    - | - | ![]()  | 
                    - | 
| BX Plus |   + Ret. mixer | 
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                  - | - | ![]()  | 
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| HC MAX, HC Plus |   + Ret. mixer | 
                  - | ![]()  | 
                  - | ![]()  | 
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| MX, MX Plus |   + Ret. mixer | 
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                    - | ![]()  | 
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| PV MAX |   + Ret. mixer(with EM Extension module)  | 
                    - |   from version 2  | 
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