Four-way diffusion refers to the ability of an indoor unit to discharge air from all four sides simultaneously to create a balanced temperature. Our Ceiling Cassette Multi-Zone models are the prime example of this technology, often used in large open-concept kitchens. For those who prefer a more industrial look, a Bravo Milano 24,000 BTU Universal Floor/Ceiling can be mounted in the center of a room to achieve similar results. In a Tri-Zone setup, these units ensure that no matter where you sit, the airflow is gentle and consistent. To hide the complex plumbing required for these center-room installs, Line Set Covers are a must for a clean finish. Our Installation Kits provide the specialized anchors needed to hang these units securely from ceiling joists. This diffusion pattern is the best way to handle "hot spots" in large residential or commercial spaces.