Does Konnected Support Zone Doubling?

No, Konnected doesn't support zone doubling.

Zone doubling is a method of using different resistor values to allow zones 2-8 to be treated as two separate zones. When zone 2 is doubled, it becomes both zone 2 and 10. Zone 2 uses a 3K resistor, and zone 10 uses a 6.2K resistor. Konnected does not support zone doubling.