Understanding Ratings for Air Conditioners
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Understanding Ratings for Air Conditioners

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Your central air conditioning system contains some of the most costly equipment you’ll buy for your home, and with a service life of 10 to 15 years or more, it’s a long-term investment. If you’re considering replacing your older equipment, it makes good sense to compare different models within your budget to help you make the wisest choice.

Why Comparing Air Conditioner Ratings Matters

It takes a lot of energy to run an air conditioner during a typical cooling season, so the equipment’s efficiency has a big impact on how much you spend to keep your home comfortable. This makes it vital to understand how equipment efficiency is measured. Every new A/C has an EnergyGuide label that’s in place to help consumers compare energy usage and features when they’re shopping for new equipment. One of the key pieces of information you’ll find on an air conditioner label is the Seasonal Energy Efficiency Ratio, or SEER.

What is the SEER Rating and What Does it Tell You?

An air conditioner’s SEER rating is assigned by the U.S. Department of Energy. This numerical rating measures the efficiency of the equipment over a single cooling season, and a higher number indicates greater efficiency. Essentially, SEER tells you the equipment’s total cooling output in British thermal units (Btu) compared to its total energy consumption in watt-hours. Air conditioners on the market today are more efficient than ever before with ratings ranging between SEER 14 and 26.

The Other Air Conditioner Rating: EER

Another A/C rating that you’ll find mentioned in Energy Star specifications is the Energy Efficiency Ratio (EER). This rating is a snapshot of the efficiency of an air conditioner operating at peak conditions with an outdoor temperature of 95 degrees, an indoor temperature of 80 degrees, and 50 percent humidity. More efficient equipment will have a higher EER.

Both of these ratings are valuable when you’re comparing air conditioners, because they tell you how efficient the equipment is in different operating situations.

To learn more about air conditioner ratings when choosing new equipment for your Portland home, contact us at Roth Heating & Cooling.

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