How Does HVAC System Work?


While many people like to think of this technology as something complex and mysterious, it’s pretty easy for those interested in learning about it to understand how HVAC systems work. 

This article will offer some tips on how you can learn more about these machines to better understand their functions and what they do for you!

What is an HVAC system?

Before we go any further, it’s important to understand what an HVAC system is. 

An HVAC system is modern heating, ventilating, and air conditioning system that provides heating and cooling to control indoor climate conditions. It can heal, calm, and condition the air in your home.

Today’s typical residential HVAC system consists of four parts: a furnace or boiler that makes hot water; an air handler that sends warm air into the ducts; ductwork that carries this heated air through the home; fans in each room to distribute the warm air throughout your house (and help circulate cold air when you’re using your AC).

How does an HVAC system work

HVAC systems, known as air conditioning systems, are used to heat and cool the air in a building. 

They can also be used to condition that air. For example, an HVAC system could be set up so that when it gets too hot outside, the HVAC system will turn on and circulate cooled air through your home. This will help keep everyone inside cool while making them more comfortable at the same time.

HVAC systems are standard in homes across America’s southern states, where temperatures rise above 100 degrees F for much of the year. However, with climate change now affecting all parts of our planet (including here), you may want to consider installing an HVAC system even if it doesn’t get very hot, especially if you live somewhere cold!

Components of an HVAC system

An HVAC system is made up of several components, including:

  • An air filter. Air filters capture dirt, dust, and other airborne particles pulled into the unit through a vent or ductwork. The objective of an air filter is to keep your home’s indoor air as clean as possible.
  • Evaporator coil: This component draws cool, refrigerated liquid out of the evaporator coil evaporator tank and passes it through tubes in front of blower motors located in the heat exchanger (where warm air from inside the house meets outside air). 

The cooled liquid chills the tubes and makes them cold enough for water vapor to condense on them instead of freezing at room temperature like most metals would do outdoors during the winter months. 

When this happens inside an HVAC system’s pipes under high pressure after leaving its condenser coils cooling off outside ambient temperatures before being pumped back into your home through ducts galore!

The compressor transfers this energy into mechanical work, pushing refrigerant through a series of pipes back to the condenser coil, where it is cooled down before being sent back into the evaporator for another cycle.

The condenser is located outside your home and has fins that absorb heat from outside air passing over them and from exhaust gases discharged by other equipment located nearby (such as furnaces). 

The refrigerant is cooled as it passes through this finned surface and returns to its liquid state before being pumped back into your house through ductwork (the pipes leading from outdoors).

Thermostat of HVAC

A thermostat is a device that regulates the temperature of a home or building. The thermostat can be controlled by the occupant, or it can turn itself on and off based on preprogrammed settings set by an HVAC technician.

Thermostats come in two main varieties: mechanical and digital. Mechanical thermostats work using a bimetallic strip, which expands when heated and contracts when cooled. 

This expansion/contraction causes the needle to move slightly within its casing, making contact with different parts of a circuit board that controls whether the unit is powered on or off. 

Digital versions use sensors to detect ambient air temperature around them; these sensors send information along wires to an electronic display panel where numbers/letters appear, showing you exactly how warm (or cold) your home has become since its last check-in with your personal assistant Siri®!

Furnace of HVAC

The furnace is the central component of an HVAC system. It heats and cools the air and distributes it throughout a building. The furnace sits between two pipes and transfers heat from one to another by convection, radiation, conduction, or evaporation.

Evaporator coil of HVAC

The evaporator coil is the part of the HVAC system responsible for cooling the air. It is located in the furnace, and it has copper tubes and fins responsible for condensing the refrigerant. The heat exchanger is responsible for removing heat from the air by using refrigerant.

Compressor of HVAC

The compressor is the heart of your HVAC system. It’s what keeps everything running, it’s responsible for cooling and heating your home, and it can be easily damaged if not maintained properly. 

The compressor is the part that provides power to an air conditioning unit, for example, so if it runs out of gas or breaks down, then you might have a problem on your hands!