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

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

   Does cleaning air ducts really make a difference? Yes, cleaning air ducts can ensure the HVAC system is working efficiently, can reduce your energy bill, decrease dust, debris and mold in the home.

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

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

   Regularly cleaning your HVAC system, even with the help of a professional, contributes just as much to dust elimination so the particles do not recirculate back into your house. Common Causes Of ...

4. 9 Dusting Mistakes That Just Lead to More Dust - AOL

   www.aol.com/lifestyle/9-dusting-mistakes-just...

   Another unexpected dust-fighter: cleaning your sheets and comforter. "Bedding can be a leading source of dust in the home," says Mock. "Washing your bedding once a week can help prevent this."

5. Duct (flow) - Wikipedia

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

   A duct with less than 0.75 mg/100m 2 is considered to be clean, per the NADCA standard. [7] A Hong Kong standard lists surface deposit limits of 1g/m 2 for supply and return ducts and 6g/m 2 for exhaust ducts, or a maximum deposit thickness of 60 μm in supply and return ducts, and 180 μm for exhaust ducts. [ 8 ]

6. Corsi–Rosenthal Box - Wikipedia

   en.wikipedia.org/wiki/Corsi–Rosenthal_Box

   The Corsi–Rosenthal Box is a design for a do-it-yourself air purifier that can be built comparatively inexpensively. It consists of four [1] or five [2] [3] HVAC particulate air filters that form a cube and a box fan to draw air through the filters. The seams of the cube are sealed with duct tape.

7. 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.