| Model name | 
Modena HE Combi | 
Modena HE System | 
| Picture | 
   | 
   | 
| Features (kW) | 
Units 27, 32, 38 | 
Units 18, 25, 32 | 
| User Interface | 
| Digital Interface | 
Yes | 
Yes | 
| User interface | 
Digital controls | 
Digital & manual controls | 
| Mechanical timer | 
No | 
Yes | 
| Digital timer | 
Yes | 
Yes | 
| Casing | 
White silk | 
White silk | 
| Programmable Room Thermostat | 
Digital | 
Digital/ mechanical | 
| Microprocessor control and adjustment system with self-diagnosis | 
Yes | 
Yes | 
| Gas | 
| Fuel | 
NG, LPG | 
NG, LPG | 
| SAP 2009/2012 annual efficiency (PCDB/SEDBUK) “A” class | 
89% | 
89% | 
| NOx class- best in class | 
5 | 
5 | 
| Installation | 
| Compact size | 
Yes | 
Yes | 
| No plate to plate heat exchanger or diverter valve | 
Yes | 
Yes | 
| Number of moving operating parts | 
4 | 
3 | 
| Bi-thermal heat exchanger | 
Yes | 
Yes | 
| Electrical | 
| Electrical supply | 
230/50Volts/Hz | 
230/50Volts/Hz | 
| Mechanical | 
| Robust stainless steel burner | 
Yes | 
Yes | 
| Filling loop | 
Yes | 
Yes | 
| ErP | 
| Hot Water Min/Max Temp | 
60/80 | 
N/A | 
| Heating Min/Max Temp | 
25/35 | 
30/50 | 
| ErP Rating | 
A | 
A | 
| Weight | 
| Netto weight | 
29-33 | 
28-30 | 
| Gross weight | 
31-33 | 
30-32 | 
 | 
| Model name | 
i25 Combi | 
i29 Combi | 
| Picture | 
   | 
   | 
| Features (kW) | 
Unit 25 | 
Unit 29 | 
| User Interface | 
| Digital Interface | 
Yes | 
Yes | 
| User interface | 
Digital & manual controls | 
Digital & manual controls | 
| Mechanical timer | 
Optional | 
Optional | 
| Digital timer | 
Optional | 
Optional | 
| Casing | 
White silk | 
White silk | 
| Programmable Room Thermostat | 
Optional | 
Optional | 
| Microprocessor control and adjustment system with self-diagnosis | 
Yes | 
Yes | 
| Gas | 
| Fuel | 
NG, LPG | 
NG, LPG | 
| SAP 2009/2012 annual efficiency (PCDB/SEDBUK) “B” class | 
76% | 
74% | 
| NOx class | 
3 | 
3 | 
| Installation | 
| Compact size | 
Yes | 
Yes | 
| No plate to plate heat exchanger or diverter valve | 
No | 
No | 
| Number of moving operating parts | 
6 | 
6 | 
| Bi-thermal heat exchanger | 
No | 
No | 
| Electrical | 
| Electrical supply | 
230/50Volts/Hz | 
230/50Volts/Hz | 
| Mechanical | 
| Robust stainless steel burner | 
No | 
No | 
| Filling loop | 
Yes | 
Yes | 
| ErP | 
| Hot Water Min/Max temp | 
60/80 | 
60/80 | 
| Heating Min/Max temp | 
30/50 | 
30/50 | 
| ErP Rating | 
A | 
A | 
| Weight | 
| Netto weight | 
30 | 
30 | 
| Gross weight | 
32 | 
32 | 
 | 
| Model name | 
Econcept 51A | 
Energy Top W 60, 80, 125 | 
| Picture | 
   | 
   | 
| Features (kW) | 
Units 11-53 | 
Units 17-123 | 
| User Interface | 
| Digital Interface | 
Yes | 
Yes | 
| User interface | 
Digital & manual controls | 
Digital & manual controls | 
| Mechanical timer | 
N/A | 
No | 
| Digital timer | 
Optional | 
Optional | 
| Casing | 
White silk | 
White silk | 
| Programmable Room Thermostat | 
Yes | 
No | 
| Microprocessor control and adjustment system with self-diagnosis | 
N/A | 
No | 
| Gas | 
| Fuel | 
NG | 
NG | 
| SAP 2009/2012 annual efficiency (PCDB/SEDBUK) “A” class | 
89% | 
89% | 
| NOx class | 
5 | 
4 | 
| Installation | 
| Compact size | 
Yes | 
No | 
| No plate to plate heat exchanger or diverter valve | 
No | 
No | 
| Number of moving operating parts | 
8 | 
9 | 
| Ceramic reverse micro flame burner | 
Yes | 
No | 
| Electrical | 
| Electrical supply | 
230/50Volts/Hz | 
230/50Volts/Hz | 
| Mechanical | 
| Robust stainless steel burner | 
No | 
No | 
| Filling loop | 
Yes | 
Yes | 
| ErP | 
| Hot Water Min/Max temp | 
60/80 | 
60/80 | 
| Heating Min/Max temp | 
30/50 | 
30/50 | 
| ErP Rating | 
A | 
A | 
| Weight | 
| Netto weight | 
46 | 
52-64 | 
| Gross weight | 
48 | 
54-66 |