Looking for an efficiency of 98%?

A.O. Smith produces very energy-efficient products; TWI and BFC. These products vary in efficiency, ranging from 95% to 98% (gross). Without doubt,  A.O. Smith’s condensing products can be called energy efficient.

Appliance Efficiency (gross)
TWI 35 – 130 95%
TWI 45 – 190 95%
BFC 28 96%
BFC 30 98%
BFC 50 96%
BFC 60 95%
BFC 80 97%
BFC 100 95%
BFC 120 98%



The efficiency of a water heating appliance is expressed in percentages. The percentage indicates how much energy is transferred to the water in the tank compared to how much is consumed. In the United Kingdom this percentage is usually expressed in gross value. The percentage can never be higher than 100%. In this case: the closer to a 100%, the more efficient the appliance.

Product labeling

Eco Design is a European guideline for an environmentally friendly design of products. For this process the entire life span of a product must be considered. Combined with the ErP Directive and the Labeling Directive, energy labeling for water heaters is being created. Based on the current developments the introduction of labeling will take place in the short term.

Looking at the current example of calculations used to specify the label, A.O. Smith condensing products obtain high scores. It is safe to say that our products are ready for the future.

More information on BFC or TWI?

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