13 May, 2023

HVAC System

HVAC system; principle work, types, parts, and list of inspection

Heating, ventilation, and Air Conditioning (HVAC) systems are essential for maintaining a comfortable indoor environment. 

The HVAC systems are designed to control the temperature, humidity, and air quality of a building or space.

The principle work of HVAC system

The compressor pressurizes the refrigerant and sends it to the condenser, where it releases heat and cools down. The cooled refrigerant then flows to the evaporator, where it absorbs heat from the indoor air and cools it down. This cooled air is then distributed throughout the building via a system of ducts.

The types of HVAC systems 

There are several types of HVAC systems, each with their own unique characteristics and applications. Some of the most common types include

  1. Central system: This is the most common type of HVAC system, and it typically consists of a central unit that cools or heats air and then distributes it through a network of ducts to different rooms in a building.
  1. Split unit: This type of HVAC system includes an indoor unit, typically located in the basement or attic, and an outdoor unit which sits outside the building. The two units are connected by refrigerant lines and communicate to cool or heat the air.
  1. Ductless Mini-Split system: This type of HVAC system is similar to the split system, but it doesn’t use ducts to distribute the cooled or heated air. Instead, it uses individual air handling units mounted on the walls of each room, which are connected to a single outdoor unit.
  1. Packaged system: This type of HVAC system combines all of the components of a central system into one compact unit that sits outside the building. It is often used in smaller buildings or for specific areas of larger buildings.
  1. Geothermal system: This type of HVAC system uses the consistent temperature of the earth to heat and cool a building. It consists of a series of underground pipes that transfer heat to and from the building.

The parts of the system

The parts of HVAC system (heating, ventilation, and air conditioning) equipment can vary depending on the specific type of equipment, but some common parts include

  1. Compressor: compresses and pumps refrigerant to transfer heat.
  2. Condenser: where the refrigerant releases heat to the outside air.
  3. Evaporator: where the refrigerant absorbs heat from the inside air.
  4. Coils: These are used in air conditioners, heat pumps, and refrigeration systems to transfer heat.
  5. Blower: This is the fan that circulates air through the HVAC system.
  6. Motor: This powers the blower, compressor, and other mechanical parts of the HVAC system.
  7. Thermostat: This controls the temperature of the HVAC system, and can be programmed to turn the system on and off at specific times.
  8. Ducts: These are used to distribute and circulate air throughout the building.
  9. Filters: These are used to remove dust, dirt, and other contaminants from the air.
  10. Refrigerant: This is the fluid used in air conditioners and heat pumps to transfer heat.
  11. Safety controls: These are used to shut down the HVAC equipment in case of malfunction or emergency.

The list of third-party inspection of HVAC system

HVAC system (heating, ventilation, and air conditioning) equipment inspection by a third party is an unbiased and independent assessment of the equipment to ensure it meets industry standards, regulations, and manufacturer’s recommendations. 

This assessment can help identify potential issues and ensure that the HVAC system equipment is running at peak performance, which can also increase energy efficiency, reduce costs and prolong the equipment’s life. 

A list of items that may be included in a third-party inspection of HVAC system equipment may include:

  1. Air handling units: Inspection of the filters, coils, fans, and motors to ensure they are clean and functioning properly.
  2. Chillers: Inspection of the compressor, condenser, and evaporator coils, as well as the refrigerant levels.
  3. Boilers: Inspection of the burners, heat exchangers, and safety controls to ensure they are in good working condition.
  4. Ductwork: Inspection of the ducts, and grilles to ensure they are properly sealed and insulated.
  5. Controls and thermostats: Inspection of the temperature controls, thermostats, and other HVAC system controls to ensure they are functioning properly.
  6. Electrical and mechanical system: Inspection of the electrical wiring, motor and mechanical components of the HVAC system.
  7. Energy efficiency: Inspection of the HVAC system energy efficiency and recommendations for improvements.
  8. Compliance: Inspection of the HVAC system equipment to ensure it meets local building codes and industry standards.
  9. Safety: Inspection of the equipment of HVAC system for any potential safety hazards and recommendations for addressing any issues found.

Atlas Support & Service Company can do all the necessary inspections of different Heating, ventilation, and Air Conditioning (HVAC) systems, which contributes to raising the level of safety of employees and preserving the organization’s property.

Here are some of the inspections Atlas company provides:

  • HVAC Equipment inspection
  • HDPE & UPVC Pipes inspection
  • Pressure Vessel inspection
  • Pumps inspection
  • Steel Pipes inspection
  • Oil & diesel Pumps inspection
  • Fuel Tanks inspection
  • Substation Steel Structure inspection
  • Overhead Traveling Crane inspection
  • Anchor Bolts and Steel Templates inspection
  • Cable Tray & Ladders inspection
  • Telecom Tower inspection
  • Hydraulic systems inspection and more

Atlas also gives out ISO certificates in a number of areas and does a systematic audit of the work of an organization’s main departments, which is done by an independent party.

If you are looking for our services or you have some questions, you can contact us via our email ( or call on (00966112080550)‬. And we will be thrilled to assist you.