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—— Question 4: What is Involved in a NADCA Professional HVAC Cleaning ——

Air duct cleaning is a misnomer. In actuality, the entire HVAC system should be cleaned. Failure to clean all components of the system can result in re-contamination of the entire system, thus minimizing the benefits of cleaning. Just as you wouldn’t only clean half of your living room floor, you also would not want to clean only part of your heating, ventilation and air conditioning (HVAC) system. NADCA recommends cleaning the entire HVAC system, including the following components:


• Air Ducts
• Coils
• Drain Pan
• Registers
• Grills
• Air Plenum
• Blower Motor & Assembly
• Heat Exchanger
• Air Filter
• Air Cleaner


A company must meet stringent requirements in order to be a member of NADCA. The company must have at least one NADCA certified Air Systems Cleaning Specialist (ASCS) on staff, maintain at least $500,000 in general liability insurance, agree to clean according to NADCA’s standards and comply with NADCA’s Code of Ethics.

Commonwealth of Massachusetts Certified Pesticide Applicators License # 39226

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