How does the system work?

Calvin Dodd McCracken (1920-1999), an engineer from New Jersey, built the first ‘high-velocity’ style air handler.

The core of the Hi-Velocity system is an air handling unit (AHU). This is conveniently located in the loft, basement, in cupboards or above ceilings.

The AHU is connected to a heat generating source. This could be an existing boiler, inverter driven heat pump condensing unit, chilled water heat pump or ground source heat pump.  The AHU draws air from a central point in the building through a return air grille and duct.

This air is treated (heated/cooled/purified/mixed with fresh air) in the AHU. Up to 100% fresh air ventilation is introduced into the AHU, either directly or via a heat recovery system.

The AHU is connected to a series of patented, sound attenuated, flexible, small diameter ‘mini ducts’. These mini ducts terminate in discrete outlets, which are positioned in ‘out of traffic’ areas in ceilings, floors and walls.  Treated air is delivered to each area of the building via these outlets.

Room air is drawn toward the outlets by a combination of two scientific principles, Bernouli’s Theorem and the Venturi effect. These work together to create constant,imperceptible air movement. This air movement efficiently ensures that each cubic meter of the conditioned space is heated or cooled at the same time.

Full climate and humidity control is provided by integrating fresh air and a cooling and heating circuit.

Cooling can be fitted at the time of initial installation or retrofitted at a later date.  

Conditioned air can also be fed into corridors to give an even distribution.