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Single BC
For systems under 126k BTUs and that do not require a Sub-BC.
Production: 2005 - Current
Main BC
Required for systems over 126k BTUs. A Main also allows for a Sub-BC to be installed.
Production: 2006 - Current
Sub BC
Requires the use of a Main BC. Allows for additional ports for up to 50 Indoor units.
Production: 2006 - Current