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The AIR FLOW PRODUCTS EC10 is a tee end cap designed to close off the open end of a 10-inch tee fitting in a ducted air distribution system. End caps of this type seal unused branch outlets on tee sections, preventing air bypass and maintaining system pressure balance. Licensed HVAC technicians and sheet metal contractors install this component during new construction and retrofit ductwork projects. The EC10 fits 10-inch tee assemblies in the Series 88 product line and is a straightforward, field-fitted closure piece that keeps supply or return air on the intended path.
This end cap is suited for residential and light commercial HVAC ductwork applications where a tee outlet must be capped rather than branched. It is used wherever a Series 88 tee has an unneeded branch that would otherwise remain open, causing pressure loss and reduced airflow efficiency at the intended supply or return registers. HVAC installers and service technicians encounter this scenario during system modifications, room additions, or original system commissioning.
Designed as an OEM-style end cap for 10-inch tee fittings in the AIR FLOW PRODUCTS Series 88 duct fitting line.
Installation is performed by licensed HVAC technicians or qualified sheet metal contractors. De-energize the air handling unit and confirm the system is not under pressure before fitting the end cap onto the tee branch outlet. Seal the cap connection per local mechanical code requirements, typically with approved foil tape or mastic sealant. Verify system static pressure after reinstating airflow to confirm the branch is fully closed.
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