Smoke test every every 1, 2 and 4 inch air filter from 3M, K&N, Filter Buy, Nordic Pure, Aerostar, and HDX! We test standard box fan air filters, the Corsi-Rosenthal Designs, a pro HEPA filter to show which preforms the best and costs the least. MERV 8, MERV 11, MERV 13, MERV 14 are all tested!

Buy Kits here:
https://www.etsy.com/shop/The3DHandyman

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====== SHOPPING LIST ======
(buying from these helps the channel)

FANS
Air King 20in Box Fan (best performance):
https://amzn.to/3Tbzl1O
Lasko 20in Box Fan (best price, 20% lower performance than what is shown in this video):
https://amzn.to/3c3nVNF

Pro HEPA Filters
AirDoctor: https://amzn.to/3zd27Zd
Blue Air 211: https://amzn.to/3OfXXpb


MERV 14 FILTERs
3M Filtrete 20x20x1(2 pack)
https://amzn.to/3duBAxY

Nordic Pure 20x20x2 (3 PACK):
https://amzn.to/3Ovz8WJ

MERV 13 FILTERS
3M MERV 20x20x1 (4 pack)
https://amzn.to/3DCrHIy

Filter Buy 20x20x2 (4 pack)
https://amzn.to/3hUCPbV

MERV 11 FILTERS
K&N 20x20x1 (1 pack)
https://amzn.to/3UN3mXo

3M 20x20x1 (4 Pack)
https://amzn.to/3V4dUkD

Nordic Pure 20x20x4 (1 PACK)
https://amzn.to/3IPFSM1

GAFFER TAPE
Better than duct tape for making a Corsi Box
https://amzn.to/3AR6E4Q

AIR QUALITY SENSOR
Find out the air quality in your space
https://amzn.to/3V4RZtt

====== LINKS ======
Particle Sizes:
https://www.engineeringtoolbox.com/pa...

CBC Air filter test:
   • Is an $800 purifier best to clean you...  

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