By using the heat which is released in the process of burning gas for heating the water supply, almost all of the consumed energy can be applied in this process. This heat is transferred to the water via the heat exchanger. This is the basic principle of condensing techniques. Products based on this principle are very efficient.
For the official Kiwa Gastec declarations, please refer to Support & Downloads of the BFC.
Efficiency A.O. Smith gas-fired condensing water heaters
|Appliance||EPC number||Efficiency (gross)|
|TWI 35 - 130||0,907||95%|
|TWI 45 - 190||0,907||95%|