The key design factor in a VAV system is the control of. the supplied air. The terminal unit should be sized to. take advantage of as much of its potential capacity as. possible. Without this fundamental consideration, the. customer has not received the best value for their VAV. system design.
The amperage rating on the DC motor is not the amperage the treadmill will be using from your wall outlet. Most treadmills only need 10-12 amps from the wall (or less), so a 15 amp circuit is fine, regardless of the rating on the motor. Just look at the amperage rating on the treadmill to see what your wall outlet needs to supply. #2 see #1. #3 Current is always lost in the form of heat when used to power a device. Be it in the motor, the electronics or even the line supplying the current.
You may have seen the Woodway Curve treadmill featured on The Biggest Loser. It has a curved, non-motorized tread made up of 60 individual rubber slats. Because you have to power the tread yourself, using the Woodway Curve can burn up to 30% more calories than if you used a conventional motorized treadmill. The Woodway Curve has no maximum speed. Since you are powering it, it goes as fast as you can.