Central, ‘all-air’ air conditioning systems are often installed in today residences, offices, and general buildings, but are toilsome to retrofit (install in a building that was not designed to receive it) because of the bulky air ducts required. A duct modus operandi must be carefully maintained to bar the enlargement of pathogenic bacteria in the ducts. An alternative to large ducts to drag the needed air to heat or chilling an extent is the use of remote fan coils or split systems. These systems, although most often seen in residential applications, are gaining esteem in petite commercial buildings. The evaporator coil is connected to a inaccessible condenser entity using piping instead of ducts.
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