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Evaporator Coil Orifices

Evaporator Coil Orifice
An orifice (also referred to as a piston or flowrater) is installed in an evaporator coil when the coil is a different tonnage rating than the condenser or heat pump tonnage rating. Installation takes about 5 minutes, and consists of replacing orifice already inside coil. We have an online picture step-by-step guide which shows how to do this. If you are installing a new evaporator coil and can not find manufacturer-specific information for your outdoor air conditioner or heat pump, use this chart as a reference to ensure a properly sized orifice is installed in your system.  
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