Along with sales growth, ESP as a company places a high priority on technological innovation, product reliability and continual product improvement. ESP has been manufacturing its flagship product, the Hi-Velocity System, for over 40 years. The Hi-Velocity System is a small duct system that utilizes the venturi principal to deliver air into the conditioned space providing optimum levels of indoor air quality, thermal comfort and energy efficiency to it’s customers. One Hi-Velocity System can be used to provide any combination of heating, air-conditioning, ventilation, fresh air, humidification, de-humidification and air purification, delivering total home comfort.