GermGuardian AC4825 3-in-1 Air Purifier Review 2021

After being bogged down by allergies, dust, and smoke countless times, I finally made the decision to invest in a quality Air purifier. Choosing the best Air purifier for smoke has been a daunting task for me, considering the number of products at the market. However, after extensive research, I stumbled across the perfect option GermGuardian AC4825 that would meet met all my requirements. The 3 in 1 Air purifier filters air 4x per hour at max speed in medium to large rooms up to 167 sq. feet.

GermGuardian AC4825 3-in-1 Air Purifier


Germ Guranding 3 in 1 air purifier is a 22-inch air purifier that features a cylindrical design, ideal for compact rooms. It removes up to 99.97percentage of harmful germs, dust, pollen, pet dander, mold spores, and other allergens as small as .3 microns from the air, thus providing you with fresh air to breathe. It features a three-layered filtering process.

  • The first and foremost layer consists of charcoal filters, which not only increase the lifespan of HEPA filters by absorbing large particles but also strips the air of any unpleasant odors such as pet smells, smoking, and cooking.
  • The second layer consists of a HEPA filter that captures dust, pollens, allergens, and pet hair that are not visible to human eyes but is responsible for the congested respiratory system and severe allergies.
  • The final layer of air purifying system consists of a UV-C filter, also known as ultraviolet germicidal is the second layer. It kills bacterias germs and viruses, UV-C has long been used in hospital facilities for sterilizing medical instruments; in some cases, it is also used to purify water. Besides, UV-C technology works with Titanium Dioxide to reduce airborne bacteria hence ensuring the safest air to breathe.

Specifications of GermGuardian AC4825 3-in-1 Air Purifier

  • Power indicator
  • Fan speed controller
  • UV-C light controller button
  • Filter changer light indicator
  • One-touch power on/off button


The charcoal filter can be vacuum cleaned to remove lint and dirt piled on the surface. True HEPA filter beneath the charcoal filter has to be replaced every three months if it has turned gray; however, if it is still white, you can continue using it. Use clean, soft, and dry cloth to clean the externals of the unit to intact efficiency of the device.

  • UV-C kill feature

  • Cost-effective

  • Budget-Friendly

  • easy to maintain

  • easy to operate

  • AHAM Verified & Energy Star Certified

  • True HEPA filter + prefilter/carbon filter

  • 3-year warranty

  • Prefilter/carbon filter separately replaceable

  • Blue glowing trim could be noticeable to some with high sensitivity

  • manual fan control switch

  • no auto on/off time feature

  • You’ll need to buy 3rd party filters to save money as originals are more expensive




In my personal opinion, I have nothing harsh to say against this baby; it has worked perfectly fine for me. If you live in a polluted city and looking for a budget-friendly yet effective best air purifier, then GermGuardian AC4825 is what you might need. The device is effective in cleansing the air thoroughly. It is perfect for smoking houses, people with pets, people with allergies, or just about anyone who wants to have better air quality at their home.

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