Energy Saving Products Ltd. is a proud Canadian manufacturer of heating, air conditioning and air purification products. Family owned and operated since 1983, ESP has been manufacturing it's flagship product, the Hi-Velocity System, for over 35 years. The Hi-Velocity System is a small duct system that utilizes the Venturi Principal to deliver air into conditioned space providing optimum levels of indoor air quality, thermal comfort and energy efficiency. With lower lead times and unmatched customer support, Energy Saving Products Ltd. continues to thrive as an innovative leader in the SDHV manufacturing sector.