What is a SEER Rating?

SEER ratings may be something you’re accustomed to seeing on new air conditioners. You might be wondering why this rating is so important. It’s because it indicates the efficiency of an air conditioning unit. SEER Basics SEER stands for Seasonal Energy Efficiency Ratio. The number is calculated by taking the cooling capacity in a typical season and dividing it by the energy input used in the same period. The higher the number, the more efficient the unit. Which Level Is Ideal? Minimum SEER ratings for Arizona are either 14.5 or 15. (It depends on whether your system is over or under 45,000 BTU/hr.) Ratings can go up to 21, indicating that a unit is quite efficient. The way that such efficiencies can be achieved is typically through a two-stage blower system. With this in place, the low mode would be the default and the high mode would kick in only when needed. Remember that units with higher SEER ratings can be significantly more expensive than less-efficient models, but you’ll see returns in the form of lower energy bills. In some situations, there are rebates and tax credits that could reduce the initial price of an advanced unit. At , we...

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