Air Conditioning, What is it?
We as human thrive in all kinds of climates and we can control the quality of the air in the enclosed spaces in which we live. The use of mechanical systems to achieve control in such places as homes, offices, theaters, institutions, factories, airplanes and automobiles is what is referred to as air conditioning. The most familiar type of air conditioning is summer time cooling. Although important, this is but one of the several aspects of air conditioning. Other applications include the control of humidity (air moisture), circulation of the air, and heating. It is also desirable that an air conditioner remove dust, pollen, smoke and odors from the air.
In many industrial environments, air conditioning is essential. Most print shops, for example, require constant humidity in order to control paper shrinkage. Libraries, especially one with rare books, require air control to preserve the physical quality of their collections. Bakeries and the tobacco and cotton industries require high humidity for their products, and perishables such as fruits must be stored in cool, dry rooms. Some electronic components, drugs and chemicals must be manufactured where the air is as free as possible of dust and other particles. Air conditioning is also vital in hospitals, especially in operating rooms.
There are several ways to classify air conditioners. Nearly all systems cool and clean the air while they ventilate the space. Some humidify, dehumidify, and heat as well. Air-conditioners customarily cool by blowing the air through a coil of tubing that contains a cold fluid. The fluid, usually a special chemical, is most often cooled by the process of refrigeration. The air is usually cleaned by passing it through a filter. Dry filters in particular, work like a kitchen stainer, capturing impurities while clean air passes through.
Most people tend to group air-conditioners on the basis of size and complexity. For example, the familiar boxy device, commonly referred to as a room or window air conditioner, is also called a self- contained air conditioner. This is because all of its working parts are in a single unit. Some homes and buildings have central air conditioners. These have their controls in one area and the machinery in another. Systems in hospitals, factories or other large buildings may perform several functions at once in widely separated areas. These large air conditioners often controlled by computers, are properly called environmental control systems.
The amount of cooling produced by a home air conditioner compared with the electricity it consumes is its energy efficiency ratio (EER). The higher the EER rating, the more efficient the air conditioner. National appliance standards require room air conditioners to have an energy efficiency ratio (EER) ranging from 8.0–9.8 or greater, depending on the type and capacity, and ENERGY STAR® qualified room air conditioners have even higher EER ratings.
The Association of Home Appliance Manufacturers reports that the average EER of room air conditioners rose 47% from 1972 to 1991. If you own a 1970s-vintage room air conditioner with an EER of 5 and you replace it with a new one with an EER of 10, you will cut your air conditioning energy costs in half.
The size of air-conditioner required for a given job is best determined by calculating a cooling load- that is, the amount of cooling that the machine will have to put out to condition the space. Cooling load depends upon the size and shape of the space; the number and size of windows and their orientation toward the sun, the areas of walls, ceilings, and floors and the extent to which they are insulated; local climatic conditions, the wattage of electrical equipment present and the number of people who normally occupy that space.
If you are needing an upgrade to your present system we are available to do a full assessment and calculation of your current needs.