HVAC systems which is a short form for heating, ventilation and air conditioning system is a technology for the indoor environments that enhances comfort for the occupants. The HVAC systems aims at enhancing the thermal conditions are good such that it is not too hot or too cold as well as ensuring that the quality of the indoor air is good. Thermodynamics, heat transfer, as well as fluid mechanics, are some of the principles in mechanical engineering that are used during the design of the HVAC systems. The systems used in the heating and cooling of the indoor environment are suitable for all building that aims at meeting the necessary conditions for safe and healthy living through the use of fresh air from the outdoor environment. Various indoor environments can make use of the heating and cooling systems including family homes, hotels, apartments, office and industrial buildings, hospitals as well as ships and the submarines.
Ventilation is one of the process enhanced through the HVAC system where the indoor air is replaced with the outdoor air to enhance good quality of the indoor air. Temperature control through cooling, replenishment of oxygen as well as removing dust, smoke, moisture, odours, airborne bacteria, carbon dioxide among other substances and gases are some of the processes that take place during ventilation to enhance the quality of air in the indoor environment. Use of the HVAC system is a mechanical form of ventilation which also ensures that the air from the outdoor environment is circulated evenly within the room for uniform proper air quality. Mechanical ventilation using the HVAC system is used as a back up or a supplement of the natural ventilation through the opened windows, trickle vents and the louvers. Through proper ventilation, a building is cooled releasing excessive heat.
When the temperatures are very low in the outdoor environment, the indoor environment is also affected making the living conditions uncomfortable and unbearable. Heating is done through appliances known as heaters that have been designed to generate heat into a building. There are various sources of heat for heating a building including furnace, boiler, heat pumps that heat water, steam, furnace rooms and electricity where the heat produced is distributed through various processes such as radiation, convection and conduction.
Fuels used by the various sources of heat can produced hazardous by-products due to incomplete combustion as a result of reduced oxygen such as carbon monoxide which are a health hazard to the occupants in case inhaled. In a building when in need of heating and cooling apparatus, one needs to get professional service provider. For safe installation, the professionals have the knowledge and skills as well as the right tools and equipment to do the installation.