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The IO HVAC CONTROLS rat-16 is a 16-inch retrofit air terminal designed for commercial HVAC applications. This damper-style terminal unit installs into existing ductwork systems where upgrading or replacing air distribution components is required without full duct replacement. At 16 inches in diameter, it is sized for commercial-grade airflow control and fits into retrofit scenarios where matching the original duct opening is critical. Licensed HVAC technicians handling commercial service work are the primary installers of this type of component.
The rat-16 is suited for commercial HVAC systems where retrofit installation is the project scope. It is designed to drop into existing 16-inch duct openings, making it a practical solution for system upgrades, tenant improvement projects, or equipment replacement work where duct modification is not feasible. Commercial applications such as office buildings, retail spaces, and light industrial facilities are typical installation environments for this terminal size.
Designed as an OEM-style retrofit replacement air terminal for commercial HVAC duct systems with 16-inch openings.
Installation should be performed by a licensed HVAC technician familiar with commercial air distribution systems. De-energize the air handling unit and confirm zero airflow before beginning terminal installation. Follow local mechanical codes and manufacturer instructions for securing the terminal within the duct opening. Do not operate the system until all connections and fasteners are confirmed secure.
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