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Basic Parts Of Every HVAC System


When all parts of an HVAC system are functioning correctly, it is more efficient. So first of all we have to know what are the basic parts contains in every HVAC System.And if you Understanding the parts of your HVAC system can help you maintain it properly, and learning about your heater and air conditioner makes finding and fixing problems easier.






Following are the basic parts of every hvac system :-


Furnace :-

The furnace is the key component of your HVAC system. It's also the largest, requiring substantial space -- typically in the cellar, your finished basement, the attic, or a special closet designed for that purpose.
The furnace is typically fairly large and often installed in the basement, attic, or a closet. It is filled with hot water, air, or steam and pushes cold or hot air outward into the ducts that run through every room in the building. Throughout the ducts, vents allow warm or cool air to pass into rooms.


Ducts :-

Ductwork refers to the system of ducts that transports air warmed or cooled by the system to the various areas of your home. Ducts are commonly made of lightweight aluminum. Heating ducts are installed during the construction of a home or a building. They are often run through the ceiling. In each room, at least one rectangular opening is cut into the duct so that a vent or vents can be installed. Sometimes, dampers are installed to regulate air flow. The air handler, or AHU, often attaches to the duct system as well and regulates air circulation as part of the ventilation system. 


Heat Exchanger:-

Your heat exchanger is part of the housing of your furnace, and it absorbs heat and warms cool air when your thermostat activates your furnace and the heat from combustion rises. All types of furnaces have heat exchangers, including electric units. This important component contains strong stainless steel with temperature-resistant alloys to prevent cracks and other damage, and some models have a special duct to let cool air enter your heat exchanger faster and make you comfortable in a hurry.


A problem with your heat exchanger could lead to a carbon monoxide leak, which can cause headaches, nausea, or even death. Since carbon monoxide is colorless and odorless, you should have detectors installed in your kitchen and bedrooms if you have a gas or wood furnace. Also, you should have all parts of your heating and air conditioning system inspected for problems by a professional at least once per year.


Evaporator :-

Coil Like heat exchangers, evaporator coils are also part of the furnace unit but serve the opposite function and are attached to a different part of the furnace. Instead of being within the furnace housing, they are installed inside a metal enclosure affixed to the side or the top of the furnace. Evaporator coils are activated when cool air is needed. When triggered, they supply chilled air, which is the furnace blower picks up and forces along the ducts and out through vents. The internal design of an evaporator coil resembles that of a car's radiator. Evaporator coils are connected to the HVAC system's condensing unit, which is typically located on the exterior of the building.


Condensing :-


Unit The condensing unit is installed outside the building, separate from the furnace. Inside it, a special kind of refrigerant gas is cooled through the exchange of heat with the air outside. Then, it is compressed and condensed into liquid form and sent through a tube or line made of metal. This parts runs straight to the evaporator coil. When the liquid reaches the coil, a series of small nozzles spray the liquid, lowering its pressure and allowing it to expand back into gaseous form. During the evaporation, heat is absorbed, causing a sudden drop in temperature and supplying cold air for the furnace blowers. The refrigerant gas is then sent back outside to the condensing unit, and the process is repeated again to generate additional cold air.


Refrigerant Lines :-

The refrigerant lines carry a refrigerant substance 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 narrow tubes manufactured from a durable heat- and cold-resistant metal such as copper or aluminum.



Thermostat :-

A thermostat is a device that operates by changes in room temperature. Air conditioner thermostat works by depending on random air current. It uses to turn the heater or AC unit ON and OFF. Hvac thermostat is a temperature controls. It controls the temperature of specific building.The hvac thermostat we’ll being discussion here is a room thermostat. This air conditioning thermostat controls space temperature for comfort purposes.
The space temperature thermostat is mounted 5 feet above floor level and it’s on the wall. The location where to mount the air conditioner thermostat is significant. It can’t expose direction to sunlight or heat or cold object.If it does expose to sunlight, the house either is to cold or hot.



Vents :-



It is typical to have vents placed in the ceiling, with their edges corresponding to the opening in the duct above. As warm or cool air pours through the ducts, vents allow it to disperse into the rooms below. Vents are usually made of metal, which can handle a wide range of temperatures. The vent is comprised of a rectangular edge or frame, within which is a series of thin, metal slats angled to channel the air downward. Some also include a manual control that lets users change the angle.

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