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 main aim of the HVAC systems is to ensure that the occupants of a given indoor space are comfortable by having a good supply of quality air as well as ensuring that the temperatures are optimum without being too cold or too hot. The design of the HVAC systems is based on various principles in disciplines such as thermodynamics, heat transfer as well as fluid mechanics. The outdoor environment plays a key role in the maintenance of a safe and healthy living condition in the indoor environment through the provision of fresh and cool air during the cooling and heating processes. 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. Other than exchanging the indoor and outdoor air, the HVAC system which is a mechanical form of ventilation ensures that air is circulated evenly within the room to ensure uniform good 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. During ventilation, excessive heat is released from the building hence cooling of the indoor environment.
Discomfort occurs not only when the temperature is very high but also when it goes below the normal level making a person unable to bear with the conditions. Heaters are the appliances used in the process of providing heat for the indoor environment to enhance the living conditions. Furnace, boiler, heat pumps that heat water, steam, furnace rooms and electricity are some of the sources of heat for heating the indoor environment where once heat is generated, it is distributed throughout the building through various processes including radiation, convection and conduction.
It is important to make sure that suitable precautions have been taken with the indoor heat sources more so those that depend on various fuel types since they may undergo incomplete combustion producing poisonous by products such as carbon monoxide which are hazardous to the health of the occupants. Professional service providers should be sought for the installation of heating and cooling apparatus in the given building. This is because they have qualified and experienced technicians who also have the right tools and equipment who ensure that there is safe installation.