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Understanding Heating & Cooling Efficiency Ratings

Learning about energy-efficiency ratings will help you make a more informed decision when you choose your heating or cooling system. Using higher-efficiency systems reduces your heating and cooling costs, and it’s also better for the environment.

The professionals at Action Heat Pump Services are more than happy to help – contact us for a consultation and free estimate!


Seasonal Energy Efficiency Ratio measures the efficiency of air conditioners. The rating is determined by the cooling output in British thermal units (Btu) divided by the total energy input. The higher the rating, the more efficient your system is.

Our Carrier® products all meet or exceed Canadian regulatory standards.



Annual Fuel Utilization Efficiency measures the efficiency of gas-fired furnaces and boilers. This rating provides the average seasonal input energy versus output energy, thus revealing how much natural gas is wasted. The higher the rating, the greater the efficiency is.


Heating Seasonal Performance Factor measures the efficiency of air-source heat pumps. The number is a ratio of the Btu output to the electricity input. Again, the higher the number, the more efficient the unit is.

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