One of the main advantages of a high velocity heating and cooling system is that it accommodates very tight spaces. I have an older, historical home and was unwilling to compromise integrity by tearing down the original walls. I was also hoping to avoid the mess of of installing big, bulky ductwork. A high velocity system uses small, flexible air ducts that are easily threaded through the walls and ceiling panels without the need to make giant holes. The vents are also very small in diameter and incorporate into any room without destroying aesthetics. In the past, high velocity systems were extremely noisy. Although air is pushed through the ducts at an accelerated speed, modern high velocity systems are designed to provide whisper-quiet performance. There are none of the mechanical fan noises that are often a problem with ductless systems. In the area where I live, there’s super high humidity levels during the summer. A benefit of high velocity air conditioning is that it is wonderfully effective at removing humidity from the air. It defends against moisture-related issues, such as mold, mildew and that sticky feeling. Because high velocity heating and cooling systems use a third of the space necessary for a conventional system, there is less surface area, which means less leakage. Drafts and uneven temperatures are a frequent complaint with traditional central cooling units. With high velocity units, these issues are avoided. The system maintains ideal temperature by using suction to create a gentle stream of circulating air, created very even comfort. For retrofit into an older home, a high velocity system provides efficient year round temperature control.