SA600

I’ve done a lot of work on air filtration options—both DIY and commercial—to hit specific ACH (Air Changes per Hour) and CADR (Clean Air Delivery Rate) targets within strict noise constraints. Based on my experience, what you’re aiming for is currently impossible given your budget, noise limits, and the goal of 6 ACH for a 9,000 ft3 space. You are going to have to manage your expectations. You’ll either need to lower your ACH target or increase your noise "budget." To understand the scale of the challenge, I suggest using the **Clean Air Stars** tool. However, be careful: if you set a limit of 35 dB, the tool will show you machines that stay under 35 dB individually, but the cumulative noise of multiple machines running together will exceed that limit. You have to dive into the details of their recommended solutions to see the reality. Most of these machines also don't necessarily filter gases. Here is an example for a 500 ft3 room aiming for 6 ACH at 35 dB: The only proposed option that meets the goal for your bathroom (500 ft3) is the **SmartAir SA-600** on low speed. That costs $1,400 just for one 500 ft3 room—and you have 9,000 ft3 to cover with a total budget of $2,500 for the whole house! > I’m not here to tell you what to do, but I strongly encourage you to rethink your requirements because they are currently unrealistic. I'm happy to help find solutions for difficult problems, but at first glance, this is simply impossible. https://preview.redd.it/4hbxxwt83xdg1.png?width=883&format=png&auto=webp&s=2adf6549d4b2ec02fd0cc1fe27dfb694eb1a276d

I just got the SA600. It's quiet on low and has good surface area. Why not get that instead of sqair.

I have a 250 sq-ft room and no complaints with my units CADR at Speed 4 & 5.. I'm using a SmartAir SA600. It only uses 14 Watts on speed 4 and the CADR is still sufficient. I measured mine as follows. * **Speed 4** → 320 m³/h @ 14 Watts (not noisy) * **Speed 5** → 508 m³/h @ 58 Watts (noisy at this speed) I chose the SA600 because its the only purifier that I could buy locally which has real HEPA H13 filters. I was thinking to get the Xiaomi Pro 4 purifier, as it appears to have nearly equal CADR for less money, but they are actually using a less dense "high-efficiency" filter to get more airflow. The problem is after it loses its electrostatic charge; its capture rate for ultra-fine particles will drop quickly. The SA600 uses a more dense H13 filter, so it will have superior capture rates for the entire lifespan of the filters. This is why I believe the SA600 requires two H13 filters, because they are using more dense HEPA filters. (which require two to create equivalent airflow of other units which only use one less dense filter)

After some research, I ended up in this too. I would have gotten the mini blast, but wife says the design triggers her fear of clusters of holes (trypophobia). Instead we got a SA600 for our 1st floor, runnin on level2/3 constantly. Might need one or 2 more though and replace and older air purifier; 800 sq foot per story, 3-story. Currently only reduces 1st floor PM2.5 by 45% at level 2.

usually I’d suggest SmartAir SA-600 if that’s available