What Are The Basic HVAC Components ?

There are 8 main HVAC components which work together. To keep the environment inside your building clean, comfortable, and safe for breathing.

These 8 main basic HVAC components include:

1. Thermostat:

Thermostat - HVAC components

The thermostat is normally the most visible part of your HVAC structure. Mounted on a common wall, it should be either programmed ahead or set manually to keep the house at the desired temperature. Once the desired temperature of the room becomes too cold or too hot, this thermostat can prompt the heat exchanger or the evaporator coil-condensing unit to start circulating hot or cold air as required.

2. Furnace:

 Furnace - HVAC Components

The furnace is the key component of your HVAC system. It’s also the biggest so it requires substantial area. The furnace is kept usually in the cellar or the basement. Its function is to heat the air which is to be distributed to the rooms of your home via the HVAC. This heating method is accomplished using one of four potential heat sources — combustion (burning gas, oil, coal, or propane), resistivity, heat pump, or solar power collected on site.

3. Heat exchanger:

Heat exchanger - HVAC components

 The heat exchanger is a component fitted inside the furnace. This part switches on when the furnace is activated by a thermostat to provide warmer temperatures in winter. The heat exchanger pulls in cold air, heats it, and circulates the heated air using the ducts and out through the vents to all the rooms

4. Evaporator coil:

Evaporator coil 0 HVAC components

The evaporator coil works exactly opposite to what the heat exchanger does. It cools the hot air when your thermostat is set to lower temperatures in summer. It is placed in a metal enclosure on the furnace’s exterior or to the top or side. The evaporator coil works like an automobile radiator to produce cool air, which is then circulated all the way through the ductwork.

Also read: Commercial HVAC Repair Checklist & Solutions!

5. Condensing unit:

Condensing Units 0 HVAC components

The condensing unit is connected to the evaporator coil. This unit is installed by HVAC contractors on the outside wall of your home and is filled with refrigerant gas. Once the refrigerant has been cooled to a liquid by heat exchange with the outside air, the condensing unit pumps the liquid to the evaporator coil to be evaporated into a gas once more. This is one of the esential HVAC components.

6. Refrigerant lines:

Refrigerant lines - HVAC components

These refrigerant lines carry a refrigerant material to the condensing unit vaporized in the form of a gas and return it to the evaporator coil in liquid form. These “lines” are actually thin tubes manufactured from a sturdy heat- and cold- resistant metal such as copper or aluminum.

7. Ductwork:

Duct - HVAC Components

Ductwork refers to the system of ducts that transports the air warmed or cooled by the system to the various areas of your home. Ducts are usually made of lightweight aluminum, which is easier to install for the HVAC contractors. However, they may also be made from steel, versatile plastic, polyurethane, fiberglass, or fabric.

Also, Read: What Is HVAC And What Do You Mean By HVAC System?

8. Vents:

Vent - HVAC components

The vents are the rectangular outlets which transport the heated or cooled air from the duct system into the individual rooms of your home. Manufactured from high- and low-temperature safe metal, the vents are situated on or close to the ceiling and are typically have angled slats on the front. These slats direct the treated air downward to the areas which used most of the people. The vents can be usually manually controlled or even closed, to regulate the amount of heating or cooling as per the area of the room to which it will be directed.


So these are some of the most basic HVAC components, which will help you understand how HVAC systems work. These components are the base of any HVAC system and should chosen carefully. And installed by a certified HVAC technician to reduce wastage of money and time.

1 Comment
  1. […] Also Read: What Are The Basic Components Of An HVAC System? […]

Leave a reply