Air conditioning (often referred to as AC, A/C, HVAC,) is the process of removing heat and moisture from the interior of an occupied space to improve the comfort of occupants.

It can be used in both domestic and commercial environments. This process is most commonly used to achieve a more comfortable interior environment. Typically for humans and other animals. However, air conditioning is also used to cool and dehumidify rooms filled with heat-producing electronic devices. Such as computer servers, power amplifiers, and to display and store some delicate products, such as artwork.

Air conditioners often use a fan to distribute the conditioned air to an occupied space. Such as a building or a car to improve thermal comfort and indoor air quality. Electric refrigerant-based A/C units range from small units (that can cool a small bedroom, which can be carried by a single adult) to massive units installed on the roof of office towers that can cool an entire building. The cooling is typically achieved through a refrigeration cycle. But sometimes evaporation or free cooling is used. Air conditioning systems can also be made based on desiccants (chemicals which remove moisture from the air). Some AC systems reject or store heat in subterranean pipes.

In construction, a complete system of heating, ventilation, and air conditioning is referred to as HVAC.

Here Omanquest listed the Names of  A/C Sales and Service Companies in Oman orderly.

SAS UNITED BUSINESS
Office 101, First Floor, Sohar International Bank Building, Al Khuwair, P.O Box 2301, Muscat, Muscat Governorate 130
Air Conditioning, Maintenance, Electrical Heating Ventilation, Heating Ventilation and Air Conditioning(HVAC), Industrial Products And Services, Construction & Contracting, Air-Conditioning and Refrigeration
JEBAL AL SAHAILI TRADING LLC
PO BOX: 927, Near Shell Petrol Station, Mabellah, Seeb, Muscat Governorate 113
Hardware & Building Materials, Home Solutions, Air Conditioning, Wholesale Traders, Retail
SALEH SALEM ABDULLAH YAQOOBI TRAD
P.O.Box: 125, P.Code: 511, Ibri, Ad Dhahirah Governorate
Electronics, Home Appliances, Air Conditioning, Consumables
AL MANASEF TRADING & CONT.CO (Asso)
126 An Noor Street, Muscat, Muscat Governorate
Hardware & Building Materials, Home Solutions, Electric, Home Appliances, Air Conditioning, Safety Products, Maintenance, Fabrication