Whenever you are looking for a contractor to help you with your heating or cooling system, there are a few terms you should understand. There is a common misconception about two of these terms: HVAC and AC. Are these terms referring to different kinds of companies or specializations, or are they interchangeable terms?

Interchangeable Acronyms

The terms are used interchangeably, but they both stand for different things. AC stands for air conditioning, while HVAC stands for heating, ventilation and air conditioning. Since air conditioning just means regulating the temperature of the air, whether it be heating or cooling, the terms can be used to mean the same thing.

AC Contractor Services

Whether a company advertises as an HVAC contractor or an AC contractor, it will generally offer the same services. The most common include AC system installation, maintenance, and repair, as well as heating and indoor air quality.


Whether you are installing a new heating system or you just need repairs on an old one, an HVAC contractor may be necessary. In addition, regular maintenance of your system can help to keep it working more efficiently and make it last longer.


Proper ventilation is necessary to keep your home from being stuffy. However, it is not as useful in warm climates, because the temperature difference and moisture in the air can cause water damage in walls.

Air Conditioning

Besides cooling, AC can also include regulating moisture levels to avoid problems from mold and mildew. Exhaust ventilation systems help to bring in fresh air and also get rid of old air. However, the air still needs to be cleaned, cooled and regulated.

Finding the Right HVAC Contractor

How do you know which contractor to use? Look for one that is especially reputable. Here at MD Air Conditioning & Heating in San Antonio, we provide services for AC, heating, air quality, and commercial HVAC systems. Call us today to schedule our expert services.

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