I received the Temtop M10 air meter yesterday and was able to do some testing today. First a few details of my air filter setup.
It is located on a shelf 8' high in my shop/garage. The first filter you see in the pic above is a washable filter that I do not know the Merv rating for but I'm sure it is very low. The second filter is a Grizzly 1 micron filter for their W1690 air filter system and rated for airflow of around 1,200 cfm. (The reason I say around is on Grizzly's site it is hard to find the same rating twice.)
The surface area is approximately 7,560 square inches or 52.5 sq. ft There are 6 surfaces measuring approximately 6" X14" X 15". The blower is small. I believe it came out of a house about 1,000 sq. ft. in size. A 1.5 Ton HVAC unit (according to Mr. Google) will generate 600 cfm and a 2 Ton unit will generate 800 cfm. Without disassembling the box it is hard to get an accurate measurement, but I estimate the blower is 8"X 8". I have limited Google kung fu powers and could not find anything about how many cfm that size blower would generate.
On to test results.
(Disclaimers: First. there has been virtually no shop activity since my last shop cleanup. I must state that either I'm a better shop cleaner than I ever would have imagined or I'm terrible about stirring up dust. I would go with the latter.)
First I measured the PM 2.5 levels in my undisturbed shop. It was between 1 & 2 as it kept going back and forth. Next I turned on my air filter and used my leaf blower to stir things up. I set the Temtop meter on top of a ladder as you can see in the first pic. The reading was 25. I then moved it to the air outflow side of the blower and positioned it similarly to how it was positioned on the inflow side. The reading was 3. Dust must settle fairly quickly as about 10 minutes after the initial reading the PM 2.5 reading was 10 at the intake side. I re-positioned the meter to the top of my workbench and got the same reading, 10.
So there are my initial results. I hope to study this further when I have some more time.
