Air duct cleaning is a service recommended by professional heating and cooling contractors in addition to their normal services. But the question is: is it worth the cost to have a professional clean your air ducts? We will discuss the pros and cons in the following article. To begin with, you might be wondering why you would need to get your air ducts cleaned. Isn't their job to simply push air through the heating and cooling ducts in your home, through the air filters, and out through the vents? Although this describes the main function of air ducts, the key is discovering what is in the air that your duct system is circulating. Today, most home heating and cooling systems work so efficiently because they are closed and allow only a very minimal amount of fresh air in. Closed systems allow warm and cool air to be passed quickly throughout your home, so the ideal temperature is reached quickly and constantly. However, because the typical HVAC system does not receive fresh air...