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2. 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. A 2022 study found the clean air delivery rate ...

3. Air purifier - Wikipedia

   en.wikipedia.org/wiki/Air_purifier

   Air purifier. An air purifier or air cleaner is a device which removes contaminants from the air in a room to improve indoor air quality. These devices are commonly marketed as being beneficial to allergy sufferers and asthmatics, and at reducing or eliminating second-hand tobacco smoke.

4. Clean air delivery rate - Wikipedia

   en.wikipedia.org/wiki/Clean_Air_Delivery_Rate

   Clean air delivery rate. The AHAM-certified seal lists a rating for tobacco smoke, pollen, and dust removal, and a rating for room size. The clean air delivery rate (CADR) is a figure of merit that is the cubic feet per minute (CFM) of air that has had all the particles of a given size distribution removed. For air filters that have air flowing ...

5. Air source heat pump - Wikipedia

   en.wikipedia.org/wiki/Air_source_heat_pump

   Heat pump on balcony of apartment. An air source heat pump (ASHP) is a heat pump that can absorb heat from air outside a building and release it inside; it uses the same vapor-compression refrigeration process and much the same equipment as an air conditioner, but in the opposite direction. ASHPs are the most common type of heat pump and ...

6. 8 Amazon Products Retirees Need To Buy Ahead of Fall - AOL

   www.aol.com/finance/8-amazon-products-retirees...

   It includes a handy wall plug so you can give the portable battery a boost in any AC outlet, or use it plugged in instead of a conventional charging cube. AirDoctor AD2000 Air Purifier Price: $389

7. Smog tower - Wikipedia

   en.wikipedia.org/wiki/Smog_tower

   Smog tower. Smog towers or smog free towers (see below for other names) are structures designed as large-scale air purifiers to reduce air pollution particles (smog). This approach to the problem of urban air pollution involves air filtration, and removal of suspended mechanical particulates such as soot, and requires energy or power.