The word HVAC stands for Heating, ventilation, and air conditioning but sometimes “R” is added with it (HVACR) refers to refrigeration.
The purpose of HVAC is very wide and used in every sphere of life.
It is mainly used to control the quality of indoor air, cool a special area, remove moisture to dehumidify, and filter the air to give you the best thermal comfort.
Wait a minute! This is the best and easiest explanation of a detailed HVAC system to learn in a while.
H = Heating System:
The heating system is to provide heat in the room or other specific area.
There are a few types of heating systems that are run by gas, electric, propane, oil, or solar power.
Some heating systems are Furnaces, Boilers, Heat Pumps, gas-fired space direct heaters, electric space heaters, radiant floor heat, etc.
V = Ventilation System:
Next is the ventilation system, which is a system to bring fresh air from outdoor, remove the contaminated inside’s air, and circulate it throughout the building or workplace structure.
A ventilation system may include supply fans, exhaust fans, or both of them together.
AC = Air Conditioning System:
Air conditioning in HVAC refers to cooling down the indoor room temperature by removing heat and moisture.
There are many different kinds of air conditioning systems based on the size of space that needs to be cooled.
Such as window ac unit for room cooling, rooftop air conditioning unit for entire building, central air conditioning unit, split system, portable unit, geothermal unit, etc.
R = Refrigeration System:
The refrigeration system keeps things cool. So it is used in a wide range of applications from the home refrigerator to supermarket refrigeration.
What Are The Types Of HVAC Systems?
Though we use the word “HVAC system” to generalize the meaning, there are some different types of HVAC systems.
They are standard split systems, hybrid systems, duct-free or ductless split systems, packaged systems, air systems, and geothermal HVAC systems.
Among them, the standard split system with an indoor and outdoor ac unit is the most common and widely used.
It is used in different sectors of the building like industrial, commercial, residential, and institutional properties are rapidly increasing.
What Are The Residential HVAC Systems?
In most cases, a residential HVAC system is a single, stand-alone unit.
One part of it is located inside of home and others part outside.
The split system HVAC system is very popular in residential HVAC systems.
As the main purpose is to provide heating and cooling in the house or residential needs, the size is much smaller, placed in the backyard, and no need for a larger drainage system.
The maintenance cost of a residential HVAC system is relatively low.
What Is The Commercial HVAC System?
A commercial HVAC system is used in businesses, factories, supermarkets, plants, or others where heating and cooling demand is higher.
Unlike a residential split HVAC system, commercial HVAC systems sometimes use different parts such as thermostats, dampers, etc.
Due to some reasons like noise, space, and maintenance, its proper placement is also important.
The power and energy consumption are also high in this complex structure.
But its HVAC parts can be modified or expanded though maintenance cost is higher than single uses.
What Is The HVAC Split System?
While others HVAC system is consist of multiple units together, split systems divide each differently as a single unit.
It is popular for its individual room’s heat and cool adjustment and control.
How Does An HVAC System Work?
Before going to purchase your HVAC components, equipment, parts, and tools, or having a conversation with your contractor about HVAC, you should have a solid understanding of how HVAC works and the duty of its major parts.
The HVAC system is a combination of many components which sometimes makes you frustrated when there is an issue.
A furnace, indoor air conditioner unit, or heat pump captures the heat and ductwork distributes it over the room.
Let’s learn about each major component to understand how does HVAC system works.
▞ HVAC System Outdoor Unit
When an indoor unit absorbs heat and humidity from your room’s air, an outdoor refrigeration condensing unit releases this heat to the outside.
So it is located outside of your home.
An outdoor unit, outdoor ac unit, or outdoor commercial refrigeration unit contains a fan, condenser coil, and compressor.
Many people call it condensers though they are not the same.
After the compressor pressurizes the refrigerant, a fan blows on the condenser coil to release the heat captured from the inside.
▞ HVAC System Compressor
It compressed low-pressure gas to raise the temperature and also eliminate the vapor from the evaporator.
It is a main component of the outdoor refrigeration unit.
You can learn more types of compressors, such as air conditioner scroll compressors, Copeland compressors, Danfoss compressors, BITZER compressors, Frascold compressors, semi-hermetic compressors, Carrier compressors, etc.
▞ HVAC System Coils
The air conditioning unit doesn’t provide cool air, rather it removes the heat from your room by an evaporator coil.
So it is located on the indoor unit or furnace.
When It removes heat from the indoor, the blower fan helps the refreshing air to distribute throughout the room.
The condenser coil does the opposite duty of evaporator.
It releases heat absorbed by the evaporator after being compressed by the compressor and convert into a liquid.
So its position is in an outdoor unit with a compressor.
A very common way to increase efficiency and reduce utility costs of your HVAC system is to clean your HVAC coil once a year.
▞ HVAC System Blower
A blower fan circulates the fresh air produced by AC, heat pumps, or furnaces.
So the cold or hot air can be distributed throughout the full space.
It is the one that forces the air through the ductwork system in HVAC.
Being an important part of the central HVAC system, an air blower maximizes the airflow the better efficiency, and environmental comfort.
▞ HVAC System No Welding Connection
To fulfill the HVAC system connection, all of these parts in central HVAC need to be connected.
In this case, no welding HVAC connection changed the traditional welding and soldering method and replaced it with a safer, easier, and faster installation way where no fire, no welding, and no experience is required.
It reduces the risk of flaring or leaking while the connection is still stronger.
What Does The HVAC System Include?
The HVAC system includes refrigeration tools such as manual pipe bender, HVAC flaring tool, pipe cutter, HVAC vacuum pump, refrigeration parts like refrigeration fittings, vibration eliminator, and refrigeration valve such as expansion valve, refrigerant shut off valve, refrigeration ball valve, refrigerant sight glass, etc.
What Is The Difference Between HVAC And Air Conditioning?
Using the two words HVAC system and air conditioning interchangeably, create the double about are the same things? Ok actually, there are not.
HVAC refers to heating, cooling, ventilating, and air conditioning while AC refers only to cooling.
So it is only the last part of HVAC, where HVAC has a broader meaning.
The heating, cooling, and ventilation system are not the same as AC, which only cools the air and removes heat, moisture, and humidity.
How Many Years Does An HVAC System Last?
It is the most appropriate and logical question households owner ask before buying their HVAC system that how long does an HVAC system last?
Before investing such an amount of money, everyone should know this.
Depending on the HVAC system type, they last from 10 to 25 years.
The latest AC can last between 15 to 20 years whereas the traditional one can last around 10 to 12 years.
Indeed, proper maintenance of your ac filters, coils, fins, and gas furnaces can last longer.
But extremely one HVAC system can tend to lose its efficiency.
So replacing 10 to 15 years old HVAC systems is the best idea.