Reviews You Can Rely On

GermGuardian AC4300BPTCA Review

A great combination of good performance and low cost make this a great budget option
germguardian ac4300bptca air purifier review
Credit: Jenna Ammerman
  • 1
  • 2
  • 3
  • 4
  • 5
Price:  $140 List
Manufacturer:   Guardian Technologies
By Buck Yedor, Max Mutter, and Steven Tata  ⋅  Jun 17, 2021
  • Air Cleaning Performance - 40% 6.0
  • Noise - 25% 6.0
  • Ease of Use - 25% 7.0
  • Operating Cost - 10% 7.0

Our Verdict

The GermGuardian AC4300BPTCA is a simple and affordable option to freshen up your living space. With a low upfront cost and fairly economical operating costs, the AC4300BPTCA can provide good air cleaning performance for any room in your home. If you're looking for a cheap option for infrequent use, the GermGuardian AC4100 may be a better option. However, if you're looking for a low-cost all-year or allergy season workhorse, the AC4300BPTCA is your best bet. The only real downside: it's a bit loud. While it's not terribly loud, if you're sensitive to noise, you may want to consider paying a bit more for the ultra-quiet Coway.
Good air cleaning performance
Low overall cost
Somewhat expensive replacement filters

Our Analysis and Test Results

Performance Comparison

germguardian ac4300bptca air purifier review - the germguardian4300 offers an excellent ratio of performance to...
The GermGuardian4300 offers an excellent ratio of performance to estimated lifetime cost, as do the Coway and Winix.
Credit: Jenna Ammerman

Air Cleaning Performance

The AC4300BPTCA was right around average in our air cleaning tests.

It performed well in our air cleaning testing. After 30 minutes in our smoke-filled testing room, it reduced airborne particulates by 97.19%. The top performers were above 99% at this point in the test, so the AC4300BPTCA did lag a bit behind, but not by much. At the hour mark, it had brought airborne particulates down by 99.39%. The top performer hit 99.84% at the same point, so the AC4300BPTCA was incredibly close.

The AC4300BPTCA lost some points because of its relatively low CADR (clean air delivery rate) of 100. This generally makes it suitable for rooms of up to 150 square feet, which is likely smaller than many living rooms. That's not to say it wouldn't do anything in a larger room — it would just take longer to get rid of particulates and may not ever get concentrations quite as low as it would in a smaller room. No model performed well in reducing odors, and the AC4300BPTCA was about average in that capacity as well. It reduced smoke odors in our testing an appreciable amount, but we could still smell quite a bit of smoke.


The AC4300BPTCA improved its fan noise substantially over the models that preceded it, resulting in an above-average score.

We would only consider it annoying when on its highest setting, and even then, it is borderline. The high setting results in a fan noise that is noticeable, but only those who are particularly sensitive to noise will find it grating. We were able to work for a couple of hours with it on the high setting and didn't feel distracted. On the medium setting, the pitch drops substantially and becomes more of a white noise that can blend into the background. At the low setting, the noise is barely noticeable. We've also found that to get a quieter machine, you have to make a sacrifice in price or capacity, and the AC4300BPTCA feels like a good point of compromise.

germguardian ac4300bptca air purifier review - it's easy to replace the ac4300bptca's filter.
It's easy to replace the AC4300BPTCA's filter.
Credit: Jenna Ammerman

Ease of Use

The AC4300BPTCA was again about average in our ease of use testing. It was by no means difficult to use but not quite as streamlined as the top scorers.

It keeps it simple with just two buttons, one to toggle through the three available fan speeds, and one to turn the UV sanitizer on and off. There is also a small LED indicator that lets you know when it is time to replace the filter. At 9.45 pounds and sporting recessed carrying handles, it is very easy to move this unit around. This is particularly nice for allergy sufferers that will probably only use the purifier seasonally, and then hide it away in a closet over the winter. With simple controls and a portable body, the only reason the AC4300BPTCA lost any points in this metric is because it lacks advanced features like an auto-off timer or an air quality meter. However, features like that generally come with a higher price tag, so we don't really miss them too much considering the AC4300BPTCA's price.

germguardian ac4300bptca air purifier review - simple controls make changing settings easy, though we do wish there...
Simple controls make changing settings easy, though we do wish there was an auto-off timer.
Credit: Jenna Ammerman

Operating Cost

Our estimated lifetime cost for the AC4300BPTCA came out to $516, nearly $100 less than the average.

The AC4300BPTCA is one of the more power-hungry models we tested, requiring 0.04 kWh of electricity to run for one hour. Over a year, that would amount to a cost of about $21.02 — assuming average electricity rates. However, it makes up for this with very inexpensive filters that last seven months and only cost $30. Its list price is also fairly low. This pushed its estimated lifetime cost well below the average.


The AC4300BPTCA is both a great deal upfront and in the long run. The list price is relatively low for a large purifier, and its inexpensive filters keep the lifetime costs around $500. This works out to around $100 per year over its lifetime. This makes it a great value if you're going to be using it consistently.

germguardian ac4300bptca air purifier review - affordable and functional, the ac4300 is an excellent value.
Affordable and functional, the AC4300 is an excellent value.
Credit: Jenna Ammerman


The GermGuardian AC4300BPTCA is an affordable and highly functional device. It's missing some of the features of the more premium options and is a touch on the noisy side. However, it offers good air cleaning performance and has low operating costs. It would be hard to find a better-valued air purifier.

Buck Yedor, Max Mutter, and Steven Tata
You Might Also Like

Ad-free. Influence-free. Powered by Testing.

GearLab is founded on the principle of honest, objective, reviews. Our experts test thousands of products each year using thoughtful test plans that bring out key performance differences between competing products. And, to assure complete independence, we buy all the products we test ourselves. No cherry-picked units sent by manufacturers. No sponsored content. No ads. Just real, honest, side-by-side testing and comparison.

Learn More