Synchronous fan modulation ensures that the indoor blower and the outdoor condenser fan speeds are perfectly matched for the current load. This is a core feature of the Bravo Milano 24,000 BTU Universal Floor/Ceiling, which adjusts both fans simultaneously to optimize efficiency. In a Dual-Zone system, the modulation prevents the outdoor unit from running too fast if only one small room is calling for cooling. To maintain this synchronization, high-quality communication wire from our Installation Kits must be used. We recommend browsing our Other Accessories for extra wiring if your layout requires unusually long runs. This balanced approach reduces wear and tear on the motors, extending the life of your Multi-Zone investment. It is the secret to the incredibly low energy bills reported by Bravo Milano owners.