HVAC System

13 Jul. 20

8 Components That Can Make or Break Your HVAC System

The climate control device that is responsible for Heating, Ventilating, and Air Conditioning your home plays an essential role in keeping your house comfortable throughout the seasons of the year. A  home’s HVAC system is responsible for maintaining temperatures, regulating humidity, and clearing the air.

Ergo, having an efficient HVAC system is vital will be quite an understatement. It is a crucial part of your house.

Exploring and understanding the essential components of the HVAC system, role each one plays can help you in maintaining the HVAC parts. And in the case when something stops working, you can either look to fix it yourself or let experts take care of your plumbing and HVAC needs and get your HVAC system back in order right away.


The furnace is a key component of the HVAC system. It is a large appliance usually stored in a basement, attic, utility room, or garage. There are different types of furnaces. The heating process is accomplished using one of four possible heat sources — combustion (burning natural gas, oil, coal, or propane), electric resistance, heat pump, or solar energy collected on site. Their efficiency ratings are the most important: The lower your energy efficiency, the higher your heating/cooling bills.

Heat Exchanger

The heat exchanger found inside your furnace unit’s housing. This component switches on when the furnace is activated by the thermostat to produce warmer temperatures in winter. The heat exchanger pulls in cold air, heats it, and circulates the resulting heated air via your ducts and out through the vents.

Evaporator Coil

Evaporator coils are part of the furnace and located on the top or side of the furnace unit. Evaporator coils cool air that flows through the home. The coils are activated when the thermostat indicates the home needs cool air. The evaporator coil has an opposite role to the heat exchanger; it acts to cool the air when your thermostat is set to lower temperatures in summer. It uses the furnace’s blower unit to distribute the cooled air through the home’s ductwork.

Condensing unit

It is located outside your home or property where the refrigerant gas is cooled by exchanging heat with outside air. The gas is “condensed” into a liquid form and sent to the evaporator coil. The liquid again becomes a refrigerant gas that is sent back outside, and this is part of the cooling process.

Refrigerant lines

These are the metal (usually aluminum or copper) tubes that carry the liquid to the evaporating coil and back to the condensing unit. It is a part of the cooling. This unit is installed by HVAC experts on the outside of your home and filled with refrigerant gas. Once the refrigerant cools to a liquid by heat exchange with the exterior air, the condensing unit pumps the liquid to the evaporator coil to be evaporated into a gas once more.


Thermostats can reduce energy consumption and save you money by controlling the heating/cooling function of your HVAC system. It is usually the most visible part of the HVAC system. Set on a prominent, easily accessible wall. A thermostat may be either programmed in advance or set manually to keep the home at the desired temperature. When the ambient temperature becomes too cold or too hot, the thermostat will trigger the heat exchanger or the evaporator coil-condensing unit combo to begin circulating warmed or cooled air as needed.


Ductwork refers to the system of ducts that transports air warmed or cooled by the system to the various areas of your home. They are typically located in the walls or ceiling, ending at the vents and registers in the home’s rooms. Ducts are commonly made of lightweight aluminum, but they may also be manufactured from steel, flexible plastic, polyurethane, fiberglass, or fabric.


The vents are the rectangular outlets which transfer the heated or cooled air from the duct system into the individual rooms of your home. They are made of high- and low-temperature safe metal, the vents are located on or near the ceiling and usually fronted with angled slats (“vents”). These vents direct the treated air downward to where people are using the room. Often they may be manually controlled or even closed to control the amount of heating or cooling and the area of the room to which it will be directed.

Now that you’re aware of these components, the role they play, and their importance in keeping your home a happy place, maintain them well, and for any emergency plumbing service, hire an expert to ensure you get the right service for a reasonable cost. 

24hour plumbing heating will inspect all parts of the HVAC system in your home to ensure your family is breathing clean air. To inquire about our award-winning plumbing and maintenance services or to schedule a routine check-up, feel free to reach out today and book an appointment.