Coway

Airmega 300 (AP-1515G)

Coway Airmega 300 (AP-1515G)

Running these analyses costs money. Buy through my links to help keep lights on! I may get a small commission.

Overall

#258 in

Air Purifiers

according to Reddit Icon Reddit

Sentiment score60% positive
3
1
1

Top Pros

Top Cons

Last updated: May 9, 2026

Reddit Reviews

Reddit Iconbjyanghang945
8 months ago

I have a CR box with 6 PC fans. The throughput is just not enough to deal with the fire smoke.. ended up turning my actual purifier’s fan speed up. I have the Coway 300. Speed 3(200CFM) worst day 2 of them running.

11 months ago

The machine does a slow ramp up and down when you change speed.. my thought is when you are at speed 2 and you want to change to speed 1, you have to change through 3 and 4… and 3 and 4 are fast and noisy(I use 3 normally at day time). A “delayed” changed can be helpful.

11 months ago

Oooooooh interesting… I really thought 300 and 400 are the same except bigger.. I only have 2 of the 300

Reddit IconCollar-Visual
11 months ago

Get the Coway Airmega 240. Its on sale and should be around the 1512 price and it's more powerful. You want to oversize it so you don't have to run at max speed. If you got the space and money the Airmega 300 is a nice unit also. Blue air is garbage!

Reddit Icon_Cryptonite_
11 months ago

Nice. I own the Airmega 300 and 400. They're probably my favorite units I've owned over the years.

Reddit IconEastSideGal196
12 months ago

They do help. I have the Coway 300 and 400 for my bedroom and main living room.

Reddit IconErik0xff0000
5 months ago

I have two of those for bedrooms and the bigger airmega 300 for kitchen/dining/living area. They've been working great for me (I get impacted by wildfires and my neighbors fireplaces).

Reddit IconJules_2023
about 2 months ago

Get whatever coway is on sale, I like the 240/250/300/400

Reddit Iconkarate_sandwich
12 months ago

Luckily 500sq ft isn’t too big, so you can probably get something like the Levoit 300 for the main room and a smaller one for the bathroom. My advice is don’t get something too small for your main room, or it won’t work. And if you want serious air cleaning, then something large and rated for 2x or 3x your space size like a Levoit Everest or Coway Airmega 300 would really work well (and you’ll only need 1). Most purifiers will sell different types of filters, so check if they make a HEPA or pet filter for the model you want. Standard filters are just for general dust, but stronger filters like true HEPA work on pet dander, allergens, and smoke. And extra carbon filter helps with odor control, so that would be useful in the bathroom. But note that a lot of the stronger filters will emit a weird smell for the first couple of days, so let it run a while before anyone comes over.

Reddit IconNot_A_Red_Stapler
11 months ago

Yeah I bought and returned a 300. I would just stick with the 400 models even if oversized for some (or all) rooms. It’s a lot easier to only have to keep one size of filters in the house. Plus I don’t think you’ll find anything smaller that is also nicer.

Rankings by Use Case

Top recommendations from others in the same boat

Other Reddit Recommendations: