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Let’s start with the basics. HVAC stands for heating, ventilation, and air conditioning. It not only controls the temperature of a room through heating and cooling, it also controls the humidity level through careful distribution of air inside the room. And it also can be used to purify the air from pollen and similar irritants. Primarily there are three types of systems; split and window air conditioning, packaged heating & air conditioning system and central air conditioning system. These are highly technical systems that should be installed and serviced by professionals such as those at AIRzona Comfort Solutions LLC.

With a window air conditioning unit, fans blow air through the coils. This improves how heat and cold is separated. Heat is dispersed into the outside air while cold air is blown into the room. Split air conditioning units are better suited for larger areas such as conference rooms. The name is derived because the unit is designed to split the cold from the hot side of the system. The cold side has the cold coil with an expansion valve. This is usually placed inside a furnace or similar air handling system. The handler blows air over the coil distributing the cooled air through the air ducts. These units provide numerous benefits as they have both heating and cooling equipment in a single “package”. They are often installed on a rooftop or specially designed mechanical rooms. They are also installed on ground level grades.

Unlike in split systems where the cold and hot units are separate, the package AC has all the components in one unit. These elements have a centrifugal fan or blower that helps distribute the air throughout the elements of the structure. The majority of the air conditioners in residential buildings are a variation of split systems, just larger. They consist of a cooling fan, a condenser coil and a compressor housed in a separate condensing unit. The evaporator coil is housed inside an air handler unit normally installed on the furnace. If the furnace is electric, a blower will be included in the system.

The electric compressor pumps the refrigerant gas across the system collecting indoor heat and removing it from the home. The heat is then dissipated outdoors by the coil or coils in the condensing unit. The warm indoor air is blown through the inner coil to remove moisture and heat. The heat in the air transfers to the coil and causing the air to cool. The water vapor will condense on the coil before collecting inside a drain pan. The heat, after passing to the evaporator coil, is pumped outdoors while the now cooled air inside the room circulates through the fan on the air handler while the indoor temperature is maintained.

Do you have questions about the best options for energy efficient cooling or heating? Do you need a new system installed or an old system maintained? Call AIRzona Comfort Solutions LLC.

Written by Jim Hinckley of Jim Hinckley’s America


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