What is HVAC?

Heating, ventilation, and air conditioning (HVAC) is the technology of indoor environmental comfort. The purpose of the technology is to create thermal comfort and satisfactory indoor air quality.

HVAC systems are designed by mechanical engineers utilizing the key principles of fluid mechanics, thermodynamics and heat transfer.

Heating, air conditioning and ventilation is an essential part of residential structures like homes, apartment buildings, even commercial buildings, travel lodging and the like. This technology is even used in vehicles like cars, airplanes, submarines and any other environment that requires temperature and humidity control, as well as fresh air from outdoors.

How to Keep Cool Air Inside - Clarke & Rush

What is Ventilation?

The process of replacing air within a specific space, or exchanging that air in order to facilitate the introduction of fresh, high quality air. This involves oxygen replenishment, moisture, odor and contaminant removal, which aids in the prevention of interior air stagnation.

There are generally two types of ventilation: Mechanically Forced and Natural.

change air filters

Mechanically Forced Ventilation

Mechanical ventilation uses an air handler to control indoor air quality, as well as excess humidity, odor and other contaminants. Spaces where you will find this type of ventilation are most commonly bathrooms and kitchens, which have mechanical exhaust systems to properly control the environment.

air conditioning

Natural Ventilation

Natural ventilation works just as it sounds. Air is allowed to travel naturally through mesh or gable style vents, windows, doors and other such openings. Warmer and more humid areas will likely need the help of an air conditioner to remove excess humidity and maintain comfortable thermal levels.

Packaged or Split System—What is the Difference?

Packaged systems are simply central air conditioning systems. These have an exterior, combined condenser and evaporator, which are commonly used in North American buildings and homes. Packed systems elsewhere are typically used in large indoor spaces like stadiums, cinemas and convention centers.

Alternately, split systems consist of interior and exterior coils, which are preferred and used heavily outside of North America. Split systems in North America are most often seen in residential applications, but are beginning to gain popularity in small commercial applications, as well.

With split systems the evaporator coil is linked to a remote condenser unit that uses refrigerant lines between an indoor and outdoor unit rather than directly ducting air from the exterior unit.

Split systems are often more efficient, and they take up less space, however, package systems can be far quieter, as the fan motor is outside.

How to Select a Quiet HVAC Unit for Your Home - Clarke & Rush

Air Filtration and Decontamination

In order to better the air quality within a given space a filter must be used to remove particulates, vapors and gases, and other contaminants from the air.

Filtering the debris from your air reduces the chance of health issues caused by pollutants that can trigger neurological problems, respiratory infections, and can aggravate asthma symptoms.

replacing your home HVAC air filter - Clarke & Rush

UV-C Light Air Purification

UV-C removes organic accumulation on coil surfaces on both the outer and inner surfaces. Likewise, it decontaminates drain pans, as well as other interior surfaces. Soon after the UV-C application, surfaces stay clean to maintain original specification conditions afterwards, so long as the lights are being maintained.

Discover more about UV-C residential in-duct purifiers here.

If you are interested in UV-C commercial applications, click here.

So, there it is. A run down of HVAC basics. We hope you learned a little something and are now more knowledgeable regarding your heating and air conditioning system.

If you have questions regarding your HVAC system give us a call or reach out online. One of our comfort consultants will be happy to answer your questions, schedule an appointment, or assist in anyway we can.

Clarke & Rush