How Do HVAC Systems Work?

From homes to submarines, HVAC system is being used everywhere today as a means of environmental comfort and thermal control. It is a magical thing that keeps air moving between the outside and inside of residential and commercial buildings and offers a better quality of air indoors. Heating, ventilation, and air conditioning are three main parts which make the entire HVAC system. The heating element usually works as a supplemental heating source at the time when temperature plummets whereas the ventilation element circulates and purifies air and controls moisture levels. The third element is opposite of heating and is called air conditioning which removes the existing heat from the interior of a building. Meanwhile, it is also one of the most complex systems of a home. So many people don’t know how do HVAC system work and understanding of its different varieties can save a lot of your precious time. So, before you begin shopping, you should have a clear idea of what you exactly need. Different types of HVAC systems are mentioned below.

  • Heating and air conditioning split system offers components both in and outside of a building. The system usually has an air conditioner to cool refrigerant outside and a furnace with a fan inside. This traditional system also features ductwork to carry air throughout various parts of your home. Latest energy-efficient split systems have air purifiers, and humidifiers in them.
  • Duct-free split system, as the name suggests, works without ductwork and is commonly called ductless mini-split system. This system is the best choice for retrofitting homes having non-ducted heating systems.
  • Zoned systems are another kind of HVAC system. These systems are cost effective as you can cool or heat desired parts of your home at specific times by controlling dampers inside the ductwork.
  • Humidity control systems provide a comfortable environment as in many areas, humidity can be a big problem as high temperatures so the addition of humidifiers and dehumidifiers can be made according to climate needs.

Every HVAC system has four main parts including furnace, air conditioner, ductwork and thermostat. The function of a furnace is to heat air at right temperature. The hot air is circulated to different portions of home through ductwork or piping while solar energy, heat pumps and electric resistance are different heat sources, a furnace uses. The air conditioner is responsible to reduce the air temperature by sending the hot air outside and uses electricity and coolant liquid for the process.

Ductwork can be described as a transit system to carry air from heating, ventilation and air-conditioning equipment. A well-maintained and properly installed air duct helps to maintain indoor air quality. Thermostat is the brain of whole HVAC system as it can turn on and off system, control temperature and also control other features of the system. It is heat-sensitive and can be set manually or programmed to keep the place at ideal temperature e.g. if temperature gets too hot then thermostat activates HVAC system to circulate the air as required. Moreover, evaporator coil, condensing unit, vents, heat exchanger and refrigerant lines are the other parts to run HVAC systems.

HVAC and air conditioning are two different things. If I am talking about HVAC, it means heating, ventilation, and air conditioning whereas air conditioning is another system designed only to cool down your home. Beside air conditioning units, HVAC system also has heat pumps and gas furnaces that means it deals with both heating and cooling systems. HVAC systems are good option than an air conditioner because later aren’t circulating the air inside.

In a nutshell, if you are looking to install a new system or want to replace your existing HVAC system in your home then I will recommend you to do research first about how do HVAC systems work and get estimates from different companies. Also consult with local heating and air conditioning professionals to let them know about the premises for better installation and cost-effective options.