There are basically three technologies included in the term HVAC; this includes heating, ventilation, and air-conditioning.  Its main purpose is maintaining the standard thermal comfort and satisfaction and to provide suitable indoor air quality.

It involves several disciplines of mechanical and chemical engineering focusing on the fields of heat transfer, thermo fluids, and energy conversion that is why it takes a considerable amount of expertise, skills, and knowledge when dealing with issues and concerns for HVAC service.

In recent years, experts’ studies show that refrigeration also follows the same principle with that of HVAC repair & service that is why they also have included the said process in the field’s abbreviation.

History of HVAC

HVAC evolved from inventions and discoveries made by important key people who include Nikolay Lvov, who designed his own heating system through a two volume thesis on heating and ventilation in 1793; Michael Faraday, an English scientist whose contributions and studies on electromagnetism and electrochemistry became context principles of heating and cooling companies as they manufacture their products; Willis Haviland Carrier, an American engineer famously known for inventing the modern air conditioning when he started his company Carrier Corporation in the 1930s; Reuben Nicholas Trane, an American Mechanical engineer  who founded the heating and air conditioning company, Trane; James Prescott Joule, an English physicist and brewer who studied the nature and mechanical equivalent of heat which led to the law of conservation of Energy which is a vital factor in HVAC machineries and equipments and many others.

Troubleshooting HVAC Problems

HVAC troubleshooting involving heating and cooling repair is an important part of many residential homes and business establishments. From commercial buildings, business and retail establishments, medical facilities, educational institutions to hotels, small to medium scale houses and apartments, it is best to ensure that the HVAC system is in place and is working in tip-top condition to provide comfort and satisfaction to all people.


Heating or Central heating provides the necessary warmth from one point to different areas and multiple rooms. The needed heat is distributed throughout the house or building by forced air along ductworks, by means of water circulating through a specially designed pipe or by steam traveling along channels or conduits. The most commonly used type of heat generation involves the combustion of fossil fuel in a boiler or furnace.

Energy sources maybe tap from different means including solid fuels or natural gases, hydronic heating systems which typically uses liquid or water wherein generated heat comes from a boiler and pumped to circulate the heated water, steam heating system which takes advantage of high latent heat, electric heaters provided by baseboard and space heaters, furnaces or wall heaters, air source heat pumps provided by extracting from outdoor air during cold weather conditions and other environmental aspects.

Heating and air conditioning contractors should be well versed and knowledgeable in terms of where the possible cause of the heating system issue is and ensure they have a great deal of technical know-how as this involves chemicals and highly dangerous materials which is harmful when this is not handled properly.


Ventilating or ventilation is the process of exchanging or replacing the air in any given structure to provide high-quality indoor air in consideration of temperature control, oxygen supply and the removal of odors, smoke, moisture, bacteria and carbon dioxide.

This is best done by continuous air circulation and avoidance of air stagnation. It is supplied by natural ventilation, either by wind-driven ventilation or by buoyancy-driven ventilation which makes use of higher and lower air temperature.

The other method makes use of mechanical air handlers or exhausts which removes the odor and sometimes the humidity factoring in the flow rate and noise level of the equipment or machinery.

Residential HVAC repair providers should be aware of the type of method a certain establishment has to provide the needed action and should consider the thermal acceptable level.

Air Conditioning

Air conditioning provides the cooling and humidity control for all or just a fraction of a house, room or building. Both the air conditioning and refrigeration involves mainly the removal of heat through thermal radiation, convection or conduction whereas refrigeration makes use of chemicals referred to as refrigerants. A compressor pumps the refrigerant gas or air to a high pressure and temperature area.

Air conditioners may be classified as central or split type. Central or all air air-conditioning is combined with external condenser/evaporator unit installed in residential structures, offices and public buildings. An indoor coil filled with the refrigerant liquid cools the air and is then distributed through the strategically placed ducts.

The split type uses the same set up like the conventional central air conditioners using compressor/condenser. The only difference though would be in the distribution aspect wherein each zone or recipient rooms have its own air handler.

Each of these indoor units is connected to the outdoor ones via specialized channels carrying the power and refrigerant lines mounted in walls or ceilings. Air conditioning repair service and repair focuses on the air conditioners filters, coils, and fins and would often times require a regular maintenance to function effectively and efficiently by qualified and licensed AC technicians.

Filters are generally of lightweight thin materials and would entail replacing or washing as conditions warrant. The homes or business offices that the air conditioning supports may include dust and dirt resulting in blocked air, wasted energy which produces higher electric bills. Residential HVAC repair companies should be able to provide an overall diagnosis of the problem and root causes so as the needed action would be applicable to sustaining the air-conditioning life and efficacy.

Since the air conditioner moves heat from the indoor coil to the outdoor coil, these should also be kept clean as well as the condenser coil. Failure to keep the condenser coil clean will result in damage to the compressor.

Energy efficiency standards have also been kept in place since the 1980s, and the manufacturers of the HVAC equipment and tools have been exerting much effort in ensuring all systems they produce will be more efficient.

The more efficient the equipment is, the lower the cost that it reflects once the bill arrives.

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