Everything You Need to Know About AC Units 

As the summer heat begins to roll in, having a reliable and efficient air conditioning (AC) unit is  essential to keep your home comfortable. Here’s everything you need to know about AC units: 

Types of AC Units 

There are several types of AC units, each with their own benefits and drawbacks. The most  common types of AC units include: 

• Central air conditioning: This type of AC unit is installed in the home’s ductwork and  cools the entire home using a compressor located outside. 

• Ductless mini-split systems: These units don’t require ductwork and are ideal for cooling  individual rooms or areas of the home. 

• Window air conditioners: These units are installed in a window and are ideal for cooling  smaller spaces. 

Choosing the right type of AC unit depends on several factors, including the size of your home,  your budget, and your specific cooling needs. 

Efficiency Ratings 

When choosing an AC unit, it’s important to pay attention to the unit’s efficiency rating. The  Seasonal Energy Efficiency Ratio (SEER) measures the unit’s efficiency, with higher ratings  indicating better efficiency. In Missouri, the minimum SEER rating for new units is 14, but units  with higher ratings can provide even greater energy savings. 


Regular maintenance is essential to keep your AC unit running efficiently and prevent costly repairs. Some maintenance tasks you can perform on your own include changing the air filter, cleaning the condenser coils, and ensuring proper airflow. However, it’s also important to schedule professional maintenance with a licensed HVAC technician at least once a year. 

Repair or Replace? 

When an AC unit begins to experience problems, it’s important to weigh the costs of repairs  versus replacement. While minor repairs may be more cost-effective in the short term, a unit  that is nearing the end of its lifespan or experiencing major issues may be more cost-effective  to replace. 

In O’Fallon, Missouri, Stay Cool Climate Control can provide expert advice and services for all  your AC unit needs, from installation and maintenance to repairs and replacements. 

Having a reliable and efficient AC unit is essential for staying comfortable during  the hot summer months. When choosing an AC unit, consider the type of unit, efficiency  ratings, and maintenance requirements. If your unit is experiencing problems, weigh the costs of repairs versus replacement. Contact Stay Cool Climate Control in O’Fallon, Missouri for all your AC unit needs.

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