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The SPACEPAK 45AC-PAJ is a sheet metal plenum adapter designed to connect a 9-inch round duct transition at the plenum on electric heater systems. This adapter provides a secure, properly sized interface between the heater plenum and the distribution ductwork, helping maintain airflow integrity throughout the system. It is fabricated from sheet metal for durability in residential and light commercial forced-air applications. HVAC technicians and installers fit this adapter during new equipment installation or when replacing deteriorated plenum connections on electric heating systems.
This plenum adapter is used in forced-air electric heating systems where a 9-inch round duct connection is required at the heater plenum outlet. It is suited for residential installations where SPACEPAK electric heater equipment is being installed or serviced. The adapter simplifies duct transitions and helps ensure a tight, low-leakage connection at the plenum, which is critical for system efficiency and proper airflow distribution.
Designed as an OEM-style plenum adapter for use with SPACEPAK electric heater systems requiring a 9-inch round plenum duct connection.
Installation should be performed by a qualified HVAC technician in accordance with local mechanical codes and the equipment manufacturer guidelines. Always disconnect and lock out electrical power to the heater system before beginning any plenum or ductwork work. Secure the adapter using appropriate sheet metal screws and seal all joints with listed duct sealant or metallic tape per applicable codes. Do not overtighten fasteners in a way that distorts the adapter collar or compromises the duct seal.
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