August 8, 2019 Uncategorized

Buying a new air conditioner is not something you do regularly. It’s quite an investment. For this reason alone, it should not be taken lightly. If you are using an AC that’s 10-15 years old, don’t be surprised to know that you could be paying more for cool air than if you’re using a new, energy-efficient unit.

Marsh Heating and Air Conditioning is your trusted HVAC company in Shakopee MN that offers a wide array of Lennox air conditioners. These cooling systems are designed to give you optimum comfort at reasonable prices.


Trying to maintain a 15-year old air conditioner doesn’t come cheap. Old units have to be serviced four times per year instead of the usual two for newer units. That means you’re spending at least $200 on maintenance alone per year.

Giving your old AC regular preventive maintenance is great, however, you cannot stop it from experiencing a decline in performance due to wear and tear. The real challenge is not finding a good technician but procuring replacement parts. The older your AC is, the harder it is to find new components.


Not only old air conditioners are outdated in terms of efficiency, but they are also dangerous to the environment, particularly because of the refrigerant they use. If your AC requires R22 as its primary coolant, you’re maybe looking at a $500 bill just to have it recharged. In fact, as of 2010, R22 has been totally banned from production and importation. That’s the reason why it’s so expensive to get an R22 refill.

The main reason behind the prohibition of R22 refrigerant is due to its effect on the ozone layer. This refrigerant is an ozone-depleting substance, which once released reacts with the ozone layer, causing substantial damage. Over time, this damage caused a greater level of UV radiation to reach the surface of the earth.  As a result, our temperatures have gotten higher, leading to increases in cataracts, sunburn, and skin cancer.

On the other hand, new air conditioners are now equipped with R410a refrigerant. This is approved for use in all newly manufactured air conditioners and heat pumps. In contrast with R22, R410a does not contribute to the depletion of the ozone layer. Also, R410a is better at absorbing and releasing heat than R22. This is one of the reasons why new air conditioners are much more energy-efficient than their old counterparts. Furthermore, this refrigerant requires the use of more durable air conditioner parts, which lowers the risk of your system overheating and breaking down.

Indoor Air Quality

In addition to producing cool air, your air conditioner also contributes to your indoor air. Due to old age and a lack of proper maintenance, old air conditioners can negatively affect your health by circulating dust, dirt, and dander. This is particularly harmful to people who have preexisting respiratory conditions, children, and the elderly.

Today, high-efficiency air conditioners contribute to good indoor air quality for a number of reasons:

  • They have longer periods of air circulation, allowing the air to continuously pass through the filter
  • High-efficiency models use variable-speed modes that change the amount of cooling and airflow that is delivered
  • They can run at low power for longer periods and keep the air moving in your home
  • They have better filtration systems

In other words, a new air conditioner, especially a high-efficiency unit, can provide excellent indoor air quality for many years compared to an old AC. Of course, it still depends on the quality of maintenance, i.e. the regular replacement of filters.

Operational Costs

As your air conditioner ages, it gets less energy efficient, particularly if it nears the end of its average lifespan. Compressors use more electricity and cool less efficiently after about 12 years, depending on the level of usage.

On the other hand, new air conditioners have a minimum SEER of 14, which means they’re significantly more energy-efficient than old air conditioners with a SEER of 10 or below.

Contact Marsh Heating and Air Conditioning for New AC Installation

If you want to know more about the advantages and disadvantages of old and new air conditioners, call us today. Our certified technicians and friendly in-house staff are always ready to address your home comfort-related questions. We are your reliable Burnsville AC installation company.