Understanding Changes to the Swing Function and Fan Speed in Heating Mode

MRCOOL mini-splits adapt their swing function and fan speed during heating mode to optimize performance. Initially, both features may be inactive during the preheat cycle, allowing the system to warm up and avoid blowing cold air. Once optimal temperature is achieved, normal operation resumes. Fan speed is typically slower to maintain consistent heating and conserve energy, ensuring user comfort in colder conditions.

Why Are These Features Necessary?

These modifications in operation are built into the design of MRCOOL mini-splits to maximize both energy efficiency and comfort. Blowing cold air while the system is still warming up can be uncomfortable in colder weather. By temporarily reducing or halting fan and swing functions, the unit conserves energy and ensures that only properly heated air is circulated into the room.