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  2. The small, seamless, and flexible ducts used in high-velocity HVAC systems allow for the same amount of volume of air to travel at a much higher velocity compared to standard systems. According to Forbes, the air in a high-velocity system travels up to 1,500 feet per minute (fpm) while standard ducts achieve somewhere in the range of 500-600 fpm.
    tooldigest.com/high-velocity-hvac/
    High velocity AC ductwork is installed without invasive construction or much modification, so the process of getting it up and running in your home is painless. The size and flexibility of high velocity ducts also means that vent placement isn’t dictated by house and room design, but where you want them.
    www.uniqueheatingandcooling.com/hvac-university…
    The Hi-Velocity SDHV (Small Duct High Velocity) System works on the principle of pressure rather than air velocity. It is quite different than a conventional furnace, the main difference being that the supply duct work is all "small diameter" or "mini duct". This makes it very easy to install inside existing walls with minimal remodelling.
    A high-velocity vent is usually round and just 5 inches around. The hot or cool air then moves from the compressor or heat pump to a high-velocity air handler. This pushes the air through your with more pressure than duct-and-vent HVAC systems.
    www.airquipheating.com/article.cfm?ArticleNumbe…
     
  3. 4 Considerations for Choosing and Installing a High-Velocity …

     
  4. High-Velocity HVAC Systems - GreenBuildingAdvisor

    Feb 20, 2024 · A high-velocity system uses an air-handler that distributes air at a higher pressure through smaller diameter ducting, increasing the rate of airflow and, theoretically, its efficiency. (For more on velocity and airflow rates, see …