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After we Clean your Air Ducts you should need them cleaned again for at least 4-8 years. Also, it depends if you live in a high traffic area or in the country.
This Mastic last from 10-15 years. What it does is coats the inside of the Plenum box where your ducts disperse the air. Which makes it resistant to growth of bacteria and mold. Also, Creates a good airflow for that clean air!
This Depends on how often you use your dryer. We recommend it be clean anywhere for 6-12 months. This is with a use of twice a week.
The best answer is YES! An average of 70% of our customer call us because of allergies, coughing, running nose etc. Over time your A/C can gather up all kinds of dust and debris. Let's not forget your A/C unit can be dirty too. Most cases small bacteria or black mold can be seen in your unit or system. We offer before and after photos so you can see what you're dealing with.