How efficient is a 20 year old ac unit?

A 20-year-old air conditioning system could use 6 kWh of electricity to cool an average-sized house. A modern air conditioning system could cool that same house with just 1.71 kWh of electricity. Most 20-year-old central air conditioners have efficiency ratings from 8 SEER to 12 SEER. Is yours older than that? Your air conditioner could have a SEER rating as low as 7 if it was manufactured in the early 1980s. Modern air conditioners last about 20 years.

However, an old air conditioner only lasts 10 to 15 years. One of the reasons it needs a replacement is that new technology strives to improve the efficiency of an air conditioner. Well, how many years should an air conditioner last? Most sources will tell you that your air conditioner should only last 10 to 15 years, even if it's maintained well. In the “old days”, many HVAC technicians would add half a ton to a ton of air conditioning (6,000 to 12,000 BTU of refrigeration) to a system just to make sure it did the job of cooling their home.

Because it doesn't work well enough as a precisely measured unit, an oversized air conditioner will not efficiently remove excess moisture from indoor air. If you don't meet the three crucial factors mentioned above, you may be considering replacing your air conditioning unit soon. Highlights the importance of the Seasonal Energy Efficiency Index (SEER) rating to measure the efficiency of an air conditioner, since higher SEER ratings indicate a higher efficiency. You notice that your technician has been there more often than your usual air conditioning check, cleaning and maintenance.

But when you came to the store to buy an air conditioning unit, a salesman who seemed intelligent told you to go for the larger units. A study revealed a 9% increase in annual space cooling energy consumption in the case of air conditioners oversized by 50%. Choosing a quality contractor to install the air conditioner is only the first step in establishing a relationship with a qualified technician. So, if you've been a victim of the services of a cheap but poor installer, don't make the same mistake twice when trying to replace your air conditioner with a durable one.

The article also highlights the tightening of energy performance standards and the benefits of purchasing “high-efficiency units” that exceed minimum requirements. Older models of air conditioning systems are less complicated, require fewer repairs, have parts that are easier to find if they need to be replaced, and undoubtedly last longer. We have developed a calculator called SEER Saving Calculator, which can be used for any air conditioner that has a SEER rating, including standard split-system central air conditioners and the packaged units.