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2. How Often Should You Clean Your Air Ducts? Experts Explain - AOL

   www.aol.com/often-clean-air-ducts-experts...

   How Often Should You Clean Air Ducts. Cleaning air ducts in your home is likely not on the forefront of your mind, but ensuring the system is maintained can reduce contaminants in your home and ...

3. No, You Don't Need to Clean Your Air Ducts Every Year ... - AOL

   www.aol.com/no-dont-clean-air-ducts-110500245.html

   If you do decide to clean your own air ducts, our step-by-step guide can help you do it correctly. You can also make things easy on yourself by choosing the right HVAC system to begin with ...

4. Is Your HVAC System Making Your Home More Dusty? - AOL

   www.aol.com/hvac-system-making-home-more...

   You should also work to maintain clean ducts by investing in professional cleaning so dust doesn't recirculate back into your home. Professionals have advanced technology that cleans deep in your ...

5. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   Clean air delivery rate (CADR) is the amount of clean air an air cleaner provides to a room or space. When determining CADR, the amount of airflow in a space is taken into account. For example, an air cleaner with a flow rate of 30 cubic metres (1,000 cu ft) per minute and an efficiency of 50% has a CADR of 15 cubic metres (500 cu ft) per minute.

6. Duct (flow) - Wikipedia

   en.wikipedia.org/wiki/Duct_(flow)

   One standard recommends inspecting supply ducts every 1–2 years, return ducts every 1–2 years, and air handling units annually. [5] Another recommends visual inspection of internally lined ducts annually [6] Duct cleaning should be based on the results of those inspections.

7. Duct leakage testing - Wikipedia

   en.wikipedia.org/wiki/Duct_leakage_testing

   Duct leakage test in the US. A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating, ventilating and air-conditioning (HVAC) ductwork. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a pressure sensing device to measure the pressure created by the fan flow.