有几个人问我，如果把净化器放在客厅里，那它能净化整间公寓吗？这样只要用一台净化器。而且，如果净化器在另一个房间，噪音也更小。
但是问题是，这样真的管用吗？即使卧室的门是关着的？
整间公寓测试
我在北京一间134平方米四居室的公寓做了测试。我用了定时器让“大胖”空气净化器每天晚上7点到早上7点开高档。
其中一间卧室的门总是开着，另外一间卧室总是关着门。在测试的中间，我调换了开着门和关着门的房间。两个卧室有镭豆空气测试仪，每分钟测PM2.5。（镭豆准吗？）
大胖是个强大的净化器。它每小时产生890立方米的清洁空气——这相当于同时开3个半BlueAir 203的最高档。
结果
经过9次测试，大胖降低了两个房间的PM2.5。但是，开着门的房间比关着门的房间多减少了18%的PM2.5。
这是说得通的，因为干净的空气可以更直接地进入开着门的房间。
然而，敞开大门也有不利的一面。在测试开始时，开着门的房间的PM2.5水平比关着门的房间高。
测试结束时，两个房间的PM2.5差不多。
PM2.5的反弹
在测试结束后的两个小时里，PM2.5在开着门的房间的反弹速度更快。
开着门的房间有更多的空气流动，这会让更多室外PM2.5进入房间。
这种快速的反弹与我们之前的测试结果是一致的：我们之前的测试发现，室外空气污染不断、快速地进入我们的家里。
这就是为什么我不建议运行净化器一段时间后就关掉它。
雾霾须知
•大胖空气进化器能够减少PM2.5，即使把它放在关着门的卧室外面。
•开着门的房间里，减少PM2.5比关着门的房间大18%。
•当然，如果把空气净化器放在卧室里面，对PM2.5的效果会更大。
开放数据
和往常一样，我将数据公开给所有人。你可以在这里下载每天的统计数据（第一部分，第二部分）。
如果需要（让人晕过去的）每一分钟的数据，给我们发邮件： [email protected]
祝你呼吸安全的空气！
Have 2600 sq. ft. House with 1300 down and 1300 upstairs. Also have 1300sq ft.unfinished basement. What purifier do I need
Hey Dorothy! That’s quite a large space, so you would probably be looking at 3-4 purifiers. At the very least, you’ll want purifiers on each floor. For your configuration, I would probably recommend 4 x SA600 air purifiers or 4 x Blast Mini air purifiers.
Hi, I just bought an air filter to cover the size of our living room. When I first used it it said the air quality was already very good. I moved it to my room which I don’t clean as often and it read as good, took 10 mins of use to get to very good.
My question is that if a room was already reading at very good before the use of an air purifier, is an air purifier really needed in that room then?
I got one to cover a larger area to move back and forth. Now I’m wondering if I should’ve gotten a smaller one just for my room.
Good question Shaleen! If your air quality monitor is already reading ‘very good’ for your living room, then it’s possible you don’t need an air purifier for that room. However, it’s worth noting a few things:
1) It’s likely your air quality monitor is only measuring for PM2.5, and not VOCs and other gases, so you should really check if you have other gases before deciding whether or not you need an air purifier in that room
2) It’s possible on the day that you first tested this out, there was little air pollution in your area. However in cases where outdoor air pollution is higher, you’re cooking, someone is smoking etc. then you may still want an air purifier in that room.
Thank you for the quick reply! I do think it’s a little odd it said the air quality was very good in the living room and kitchen since we open the windows often and cook (used the unit with closed windows). I’ll contact the company to double check if it’s measuring the VOC as well.
Thomas, thank you for running this company. You provide evidence with your claims, much more so than the other sites I find in my search queries. Do you have an article on using a dirty HEPA filter? Does a dirty HEPA filter make my air dirty too? Or does it use more electricity, but still slowly negligibly clean the air. Similar to an Activated Carbon filter for water?
Can you write an article explaining how this works? How is there enough velocity to create mixing so far away?
Great question Grant! We’ll try to put together an article explaining exactly how this works, but the general principle is the same as why cooking smells from the kitchen can make their way way around the house!