With these wide variations in mind, a rough estimate is that the purchase and installation of a high-velocity air conditioning system can cost anywhere between $3,500 and $15,000 (CAD 4,706 and CAD 20,166), according to HomeGuide.

Variable speed systems are able to run their heating or cooling cycles nearly continuously on lower speeds, thus using less electricity. Single-speed systems actually waste energy turning on and off more often, and running at full speed when they are on.

Energy Saving Products Ltd. ESP has been manufacturing its flagship product, the Hi-Velocity System, for over 40 years.

So, what is considered a high efficiency air conditioner? An air conditioner with a SEER rating of over 13 is generally regarded as high efficiency, but this depends on the size of the space you're cooling and your own personal cooling preferences.