@adamdeckardbaby: Air is a fluid which has mass, can hold and carry energy and requires energy to move. Standard air weighs 0.075lb/ft^3 and that may not seem like much until you do the math. A 1 ton window unit blower moving 400cfm is pushing 1,800lbs of weight every hour. Try moving 1,800lb of gym plates per hour and you'll begin to understand why the air conditioner is the largest energy consumer in your home. #hvac #hvaclife #hvactech