ProX

Housefresh.com's reviews are useful, because they measure sound and CADR using a consistent methodology, allowing you to compare among units. They've tested the three you mention. I'd suggest making a table of CADR and noise at each fan speed from their reviews. That's what I did. Based on a quick l

i use Coway Airmega AP-1512HH..very happy with it.. use it everything in my bedroom while i sleep..have noticed considerable difference in my early morning rhinitis

I’m not sure what’s available in Canada because they label them differently than in the states. You do not need a HEPA filter to get good air cleaning. If the Levoit is the rectangular 200, I would recommend that over the Mighty just because the Levoit is quieter. If the Levoit 200 you are talking a

With a 150 ft^3 bedroom, you need a CADR of 100 to get the recommeded 5 air changes per hour (assuming 8' ceilings). You could put something like a Coway AirMega ProX in the bedroom. On silent mode, I measured it at a CADR of 170, and there's nothing wrong with overkill. And it's probably quieter th

I appreciate the upvote. I was blissfully unaware that down voting was even a thing here. I am pretty new to this forum and hadn't noticed. Kindof sad that I know that now! I appreciate all your calculations.. I have done much of the same trying to find the right combo of dB, CFM, and cost. And yeah

It has the highest CADR while being quieter than your two options listed. I have one in my living room and it’s great, although it energy inefficient. It’s essentially just a modified Chinese filter fan with a grill. I also have an IQair healthpro plus and wouldn’t recommend it very highly. It’s jus

Sort of what Brilliant-End4664, I'd go for one in the sunroom and one in the family room. I'd leave the door open to the sunroom and put the purifier against the back wall, facing the open door. For the second I'd put it in the corner between the slated doors. It will pull from the entrance and the

Oops sorry I misread where you said budget was $250! I'll leave this here just in case it's helpful for someone else down the line. Looked up the C545. Claims it cleans 436 ftsq every 15 minutes (4x per hour). That would be on high speed. There are a few other purifiers that have better cleaning per

The problem is I don't know what "without making much noise" means to you. E.g., if you go on housefresh.com, for each purifier they reivew, they provide the noise and clearance rate at a few different fan speeds. What I found is that, for sleeping, I need the purifier to be below 35 dB (which corre

Assuming you haven't picked something out already... The Medify Air MA-112 (V2.0) is powerful, but loud on the top airflow speed/setting. Per the AHAM 2/3 rule, a 1,872 sq. ft. space would need minimum CADRs of 1,248 CFM. So any one consumer-grade purifier will fall short. I would go with the Coway