Smoothly operating furnaces and air conditioners are fairly quiet, and the noise they do make is usually consistent and unobtrusive. So when you hear noises that are loud, grating or out of the ordinary, it could be a sign that something has gone wrong.
Investing money in a high-efficiency HVAC unit won’t do you a bit of good if your ducts leak air. Duct leakage results in wasted energy and higher utility costs because the warm or cold air you are paying to condition slowly bleeds into your walls and floors. It never reaches the actual rooms in your home!
Many homeowners blame their heating and cooling system for high utility bills or poor temperature maintenance. In truth, it’s often not the fault of the system, but with leaking air ducts.