What Is an HVAC System?

What Is an HVAC System?

Your HVAC system plays a vital role in your home, ensuring your indoor spaces remain comfortable as temperatures fluctuate. Unfortunately, this system is often taken for granted until it begins to malfunction or decline in performance. Luckily, with a basic understanding of your HVAC equipment, you can help ensure it remains in good condition all year long.


Let’s take a closer look at HVAC systems, their primary components, and their essential functions.

What Does HVAC Stand for?

HVAC stands for “heating, ventilation, and air conditioning.” As the name implies, this system includes a variety of equipment that heats, ventilates, and cools your home. Residential HVAC systems typically consist of:


  • A Furnace – This appliance generates warmth by burning fuel or consuming electricity. Most residential furnaces run on gas or heating oil.
  • A Duct System – Duct systems consist of metal tubes and vents that are built into the structure of the home. They allow hot or cold air to travel throughout the residence.
  • An Air Conditioning Unit – This device includes a condenser that runs refrigerant vapor into liquid, a compressor that increases the pressure of the liquid to move it through the system, and a fan to blow the compressed fluid through the heat exchanger. This process cools warm air and pushes it throughout the home.
  • Filtration Systems – Modern HVAC systems also include purification filters that remove potentially harmful particles from the air, such as mold spores and allergens.


HVAC systems for commercial buildings also include these components, but usually on a larger scale.

HVAC System Essential Functions

HVAC home systems exist to keep residences comfortable during different types of weather. During the warmer summer months, the HVAC system will use its air conditioner to pump cool air through the duct system, lowering the temperature of the home. Meanwhile, during the winter, the HVAC system’s heater will engage, generating warm air, and pushing it throughout the house.


While heating and cooling systems have become more reliable over the years, HVAC maintenance is still a major concern for most home and commercial property owners. Luckily, Smith HVAC in Pasadena, MD offers a full range of services for residential and commercial HVAC systems, including installations, repairs, and more.

How Can Smith & Company HVAC Help?

HVAC maintenance issues rarely choose convenient times to appear. And when something goes wrong with your heating or air conditioning, you tend to notice it very quickly and want it fixed as soon as possible.


Many HVAC companies in Maryland, Crownsville, and Annapolis only operate during regular business hours. However, the team at Smith & Company HVAC understands that problems can appear at any time. That’s why we offer 24-hour emergency services for residential and commercial properties in Pasadena, MD and Crownsville, MD. Simply give us a call, and a highly-trained HVAC technician will arrive at your property to handle all of your needs.


If you’re experiencing issues with your HVAC system, building a new property, or want to upgrade an existing heater or air conditioner, we can help. Call Smith & Company HVAC for trusted professional HVAC repair services at (410) 874-0766.