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Cooling | ||||||||
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Economizer | ||||||||
Enthalpy Controls On many days in the spring and fall when the building requires cooling, the outside air is cooler and dryer than air within the building. In these situations, the percentage of outside air can be increased (often up to 100%) to provide some or all required cooling. An outdoor air economizer operates by regulating the percentage of outside air introduced into the building from a minimum of that required for fresh air to a maximum of 100%. They can operate with cooler outdoor air whenever possible, thus reducing energy used by the compressor to the tune of 10% to 15%. When considering new air conditioning systems, look for cooling units that have an integrated economizer. An economizer retrofit package or custom fabrication may also be available for your current system from your HVAC supplier. Consult the Thomas Register of American Manufacturers at your local public library for the names and manufacturers of economizers if installing as a retrofit.
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