To give you a basic idea, residential air duct cleaning in Houston, TX, starts at around $775 and increases to about $1,000 per unit in the home. This price includes a thorough cleanse of the entire air handler and duct system from top to bottom.

Duct cleaning has never been shown to actually prevent health problems. Neither do studies conclusively demonstrate that particle (e.g., dust) levels in homes increase because of dirty air ducts. This is because much of the dirt in air ducts adheres to duct surfaces and does not necessarily enter the living space.

Duct cleaning involves removing dust, dirt, and other solid materials. Air duct sanitizing goes even further to eliminate bacteria, mold, and some viruses. The sanitizer is applied using the same equipment that's hooked up to your air duct system to clean it.

An HVAC maintenance service ensures all system components work correctly and efficiently. On the other hand, air duct cleaning refers to removing dirt, dust, and other debris from your HVAC system's ductwork. It can prevent the buildup of dirt and dust in your home, leading to allergies and other health problems.