Parts Of An HVAC System – Everything You Need To Know

As you probably already know, the system that heats and cools your home is called HVAC, or heating, ventilation, and air conditioning. A furnace is used in the winter to keep you warm, while an air conditioning system keeps you cool in the summer. In spite of this, there is a possibility that one might wonder what exactly are the components or parts of an HVAC system.

A home’s HVAC system can include main components or parts such as a boiler, radiant floor heating, heat pump, ductless mini split system, or a window air conditioning system. It is imperative that we take a look at the eight basic components or parts of an HVAC system that consists of a traditional furnace and a split-system air conditioner combined into one unit.


Do you know what are the Basic components or Parts of an HVAC System?

Thermostats are the first of the basic components or parts of an HVAC system.

Due to its role as the brain behind an HVAC system basic components or parts, it is only fair to mention the thermostat first. Basically, it’s a thermometer that controls the furnace and air conditioner when they’re on.

Thermostats come in a variety of styles today, including programmable models that change the temperature automatically. It is also possible that you decide to install more than one thermostat for the purpose of zoning.


An HVAC system includes components or parts like furnace and a blower motor for its operation.


A furnace and a blower motor are two of the most significant components or parts of an HVAC system. Usually, furnaces take up a large amount of space in the basement, attic, or closet and usually require their own area.

Usually, the incoming air is heated by a fuel source (in most cases, natural gas, oil or electricity). Once the heated air has been distributed through the ductwork and out through the supply registers, it is blown out by the blower motor. The system pulls the cool air back into the registers from the return registers and starts the process all over again. It is also possible for the blower motor to be used as a source of air distribution for the air conditioner as well.


The furnace heat exchanger is located inside the HVAC system.


There is a heat exchanger in every furnace that kicks into action when the thermostat signals it’s time to heat. Burners provide heat if the furnace is powered by gas or oil. The air is heated by electric coils if electricity is the fuel source.

Heat is transferred to the metal walls of the heat exchanger as the air inside warms up. Heat exchanger walls are cooled by the air drawn into the furnace by the blower motor. By using the supply registers, the air is circulated back into the home and heated quickly.

Keeping a heat exchanger sealed prevents combustion fumes, such as poisonous carbon monoxide (CO), from entering. Vents disperse cooled fumes into the atmosphere harmlessly when operating properly. If your heat exchanger cracks, you and your family could be exposed to fumes. There can never be adequate emphasis placed on the critical nature of preventative maintenance.


The evaporator coil is also a key part of the HVAC system.


A split-system air conditioner is illustrated below with a picture of the internal parts inside the unit of the HVAC system. As a matter of fact, it is usually enclosed in a metal enclosure that is located on the side or on top of your furnace. As the indoor air passes over the coil, refrigerant flows through and absorbs heat from the air. Cool air circulates back into the living space after the heat is removed.


The condenser unit of an HVAC system is one of the primary vital parts.


There is no doubt that when you think of the parts of an HVAC system that are responsible for cooling. However, this is the component that typically springs to mind when you think of the components. Heat is expelled from indoor air to the exterior through this metal unit, which sits outside the home. By doing so, the refrigerant absorbs more heat from your home and further cools it as it passes through the evaporator coil.


Among the major parts of an HVAC system are refrigerant lines.


It would not be possible to have air conditioning without refrigerant. A coil that is located indoors and a condenser unit that is located outdoors are each connected by copper or aluminum refrigerant lines.


Ductwork can be looked upon as one of the most significant parts of an HVAC system.


Ductwork distributes conditioned air throughout a home with forced-air heating and cooling. During initial construction, ductwork is easiest to install, but retrofitting is also possible. If possible, avoid running ducts through attics, garages, and crawl spaces. The ducts should be sealed and insulated if this can’t be avoided so they won’t be affected by major temperature differences.


Registers that return and supply air to the HVAC system.


Covers such as these are used to cover the openings of ductwork. It depends on how the ductwork layout is laid out whether they are located in the ceiling, wall, or floor. To control airflow, registers typically have louvers that can be opened and closed. Keeping your home’s supply registers open at least 80 percent of the time will prevent the system from becoming unbalanced. Your home’s return and supply registers should not be blocked by rugs, furniture, and curtains.


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