The technology that helps promote indoor and environmental temperature comfort is known as HVAC. That acronym stands for heating, ventilation and air conditioning. This technology is especially important for the design of large buildings. It is also important in environments where healthy building conditions have to be regulated, due to the outside temperature and humidity. |
Normally, in a home, a heater is the appliance that keeps the household warm throughout the cold seasons. Furnaces and ovens also fall into the family of heaters. There are a large variety of heating systems available today. Central heating is used primarily in cold weather climates. This system contains a heat pump or boiler that warms water, air, or steam in a centralized location of a home or building. Warm air systems push air that has been heated through duct systems. This way, the air supply is usually filtered through cleaners that help remove pollen and dust particles. Electrical heaters are also used, mainly as supplemental, or back up warmth.
Ventilation is defined as the exchange of air with the outside atmosphere, in addition to circulation of air within a building. Ventilation is one of the most important aspects of keeping acceptable, indoor air quality. There are mechanical and natural methods of ventilation. Mechanical ventilation is used to control excess in humidity, bad odors, and air contaminates. Ceiling fans and bathroom fans are considered mechanical ventilators. Natural ventilation uses the outside air to help ventilate a building, without any sort of fan or machine. This type of ventilation can be achieved through windows and vents. Natural ventilation is very important when it comes to reducing the spread of airborne sickness. By simply opening windows or turning on ceiling fans, a person can reduce the risk of catching a cold.
Air cooling or conditioning is another part of HVAC. Air-cooling can be achieved by the removal of heat, which happens through conduction, radiation or convection. If a building or home is able to put in an entire air conditioning system, then the building will be able to have cooling, ventilation and humidity control, all from one machine.
In areas where the climate tends to shift back and forth between warm and cool quickly, a reversing valve can be put into the air conditioning system. These systems are called "central air" systems. All modern cooling systems, including window units, come with air filters already inside. These filters have to be replaced monthly to ensure the air quality stays high. If these filters are not changed within the system they will begin to waste energy, which leads to higher energy bills.
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