Home›Forums›In Chengdu›Smart Air Workshop, Sunday @ Bookworm
- This topic has 80 replies, 18 voices, and was last updated 8 years ago by Chris Ziich.
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May 22, 2014 at 10:35 am #40255CharlieKeymaster
I vacuum the shit out of my air filters, seems to work well
Smart Air recently published a blog post stating that HEPA filters should be good for at least 90 days, if not more. At that point the filter will look black, but they’re actually still effective. Vacuuming them might change the appearance but according to Smart Air and the filter manufacturers, these are not cleanable and need to be replaced.
May 22, 2014 at 10:41 am #40256Rick in ChinaParticipant“these are not cleanable and need to be replaced”
Sure – eventually I do that too. But, when I vacuum them – the goal isn’t for me to clean the actual filter fibres at the core nor suck the particles they’ve glued into their mesh, but the loads of particles and dirt/shit that clogs them up on the outside. When I run the vacuum over the filter it sucks up a _lot_ of straight up black dirt, when I empty it, I know there’s that much _less_ crap between the air floating around my apartment and the filtration system. There is occasionally cat hair, lint-type stuff, and straight up black dirt. It is certainly better not to have a layer of that on the entrance-side of the air filter. The exit (facing in) is often still looking clean when that pile of crap is fully loaded on the other.
May 22, 2014 at 11:12 am #40257CharlieKeymasterIt is certainly better not to have a layer of that on the entrance-side of the air filter.
According to their tests, the visible gunk collected after 90 days doesn’t seem to compromise the effectiveness much at all:
May 22, 2014 at 11:15 am #40259Rick in ChinaParticipantThat might be true, so – don’t clean yours, I feel better keeping mine clean, so I’ll clean mine. 😀
May 22, 2014 at 11:21 am #40260BenModeratorI have to agree with Rick on this. If you have pets that are shedding because of the warm weather then it definitely affects the CADR. Many commercial air filters include a cleanable pre-filter for this exact reason.
May 27, 2014 at 11:06 am #40360IanParticipantAfter I took the pic last week there hasn’t been much change in colour. I think over the first few days it must have picked up a lot of dust… I was wondering how the other members of the workshops filters are looking?
May 27, 2014 at 11:25 am #40362talhelmtParticipantYeah! I’d love to see pictures of how the filters are looking. Here’s a picture of the filter from our longevity test at 90 days:
July 20, 2014 at 11:09 am #41532IanParticipantHow do people feel about their filter? I saw a pic of Charlie’s and it was jet black. I have been working in Xiamen for the last two weeks and I can definitly feel a difference in my energy levels.
July 21, 2014 at 9:46 am #41538CharlieKeymasterHow do people feel about their filter? I saw a pic of Charlie’s and it was jet black. I have been working in Xiamen for the last two weeks and I can definitly feel a difference in my energy levels.
Working great. And yes, jet black after 3 months! Keep in mind, this is with two filters running in the same living room, running about 12 hours a day. Occasionally the windows are open if the pollution isn’t bad.
Smart Air recently updated its Particle Counting tumblr with updated information on longevity. After 100 days the filters are 80% effective, so that seems like a good time to switch at 80rmb in my opinion.
July 21, 2014 at 10:38 am #41542CharlieKeymasterBy the way, I recently published a review of the SamoAir pm2.5 measuring device: SamoAir Review. This is a 200rmb device which measures pm2.5 levels inside your house or anywhere, which is a really economical way to test the effectiveness of air filters in your home.
July 21, 2014 at 1:54 pm #41549niklasParticipantBy the way, I recently published a review of the SamoAir pm2.5 measuring device: SamoAir Review. This is a 200rmb device which measures pm2.5 levels inside your house or anywhere, which is a really economical way to test the effectiveness of air filters in your home.
Looks like a neat kit. Another alternative is to buy the sensor for around 25-30RMB and hook it up to a Raspberry Pi/Arduino/similar device. Pretty neat if you anyways got one at home running 24/7. http://s.taobao.com/search?q=GP2Y1010AU0F
This is probably the sensor SamoAir is using, but I’m not 100% sure.
July 21, 2014 at 2:00 pm #41550CharlieKeymasterLooks like a neat kit. Another alternative is to buy the sensor for around 25-30RMB and hook it up to a Raspberry Pi/Arduino/similar device. Pretty neat if you anyways got one at home running 24/7. http://s.taobao.com/search?q=GP2Y1010AU0F This is probably the sensor SamoAir is using, but I’m not 100% sure.
Yup, definitely the same sensor! Amazing how cheap this stuff is.
August 11, 2014 at 10:37 am #41929IanParticipantJanuary 11, 2015 at 10:11 am #44003IanParticipantMy filters are working overtime today….
January 11, 2015 at 10:24 am #44004IanParticipantCheck out the 200 day results
January 12, 2015 at 5:58 pm #44044CharlieKeymasterMy filters are working overtime today…. http://www.theguardian.com/cities/2014/dec/16/beijing-airpocalypse-city-almost-uninhabitable-pollution-china
That was a great article. Beijing’s situation sounds a lot more serious than Chengdu, but I wonder if we won’t be there eventually. Recently I’ve met a lot of visitors coming to Chengdu who are surprised to find the city polluted (“I thought this was a clean city”).
January 12, 2015 at 6:42 pm #44052IanParticipantI think 2014 was pretty good compared to 2013/2012 for Chengdu. Maybe the construction of the 2nd ring made a big impact.
January 16, 2015 at 12:03 am #44091CharlieKeymasterI think 2014 was pretty good compared to 2013/2012 for Chengdu. Maybe the construction of the 2nd ring made a big impact.
Right, it has. Sascha collected data on this for an article he wrote here a while back, but in the last half of 2014. The pollution decreased in Chengdu in 2014.
January 16, 2015 at 2:48 pm #44107IanParticipantIt’s all about the bacon
http://shanghaiist.com/2015/01/16/sichuan_official_blames_smoked_baco.php
January 19, 2015 at 1:26 pm #44141BrendanModeratorNot sure if this data has been made available before, but is there a calculation for the (chosen) filters capacity/saturation point of PM 5, and/or PM 2.5 particulate?
Just curious after reading through the data on the 200 day results.
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