What size room is the AC4825 good for?

It is best for bedrooms, dorms and rooms up to about 150 square feet, where it cycles the air several times an hour. In larger rooms it still runs but cleans the air more slowly.

Does it really need the UV-C light?

The UV-C light is optional and can be switched off. The HEPA and carbon filters do the main particle and odor work; the UV bulb is an extra layer and needs replacing periodically.

How often do filters need changing?

GermGuardian advises replacing the HEPA filter roughly every 6 to 8 months and the carbon pre-filter more often, depending on use and pets. A clogged filter cuts airflow and cleaning power.

On the lowest speed it is quiet enough for most bedrooms. The higher speeds are noticeably louder and better suited to daytime cleaning.

Can I use third-party filters?

GermGuardian says to use genuine replacements to keep rated performance. Third-party filters may fit but can reduce airflow and filtration.

Does it help with pet odors?

The carbon pre-filter helps with odors and the HEPA layer traps pet dander. Owners with cats and dogs report improvement, though a single unit suits one room.

Where is the GermGuardian AC4825 cheapest?

At Walmart, for $99.99, as of our latest check.

What do buyers say about the GermGuardian AC4825?

Rated 4.7 out of 5 from 152 ratings.

Where can I buy the GermGuardian AC4825?

3 stores we checked sell it, including Walmart, Staples, Quill.

GermGuardian AC4825

Best price now

$99.99at WalmartChecked 11 h ago

Compared across 3 stores. Prices are checked against each store and labelled with when.

Visit Walmart

GermGuardian AC4825

Best price now

$99.99at WalmartChecked 11 h ago

Compared across 3 stores. Prices are checked against each store and labelled with when.

Visit Walmart

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It checks today's price at every store, compares the alternatives and answers in about a minute.

Price facts

Last seen at $99.99 at Walmart on Nov 10.
Checked at 3 stores.

Our take on the GermGuardian AC4825

The GermGuardian AC4825 is a tower air purifier with a true HEPA filter, a carbon pre-filter for odors, and an optional UV-C light. It is rated at 125 CADR for pollen, so it suits bedrooms, dorms and small living rooms rather than open-plan spaces. Three fan speeds include a quiet low setting for sleeping. Against larger HEPA towers it cleans less air per pass and covers a smaller room, but it is compact, simple to run and widely owned.

Best forBedrooms and dorm roomsAllergy and dust relief in small roomsPet owners dealing with odorsShoppers who want a simple tower with a UV option

Pros

True HEPA plus carbon pre-filter traps allergens and odors
Optional UV-C light on the top panel
Three speeds with a quiet low setting
Slim 6.8-inch tower footprint fits tight corners
3-year limited warranty

Cons

125 CADR is modest; it will not keep up in large open rooms
Replacement filters are needed regularly and add to running cost
UV-C bulb needs periodic replacement
No auto mode or air-quality sensor

GermGuardian AC4825 prices at every store

WalmartNew
In stockSold by Home StoreReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
$99.99Free shippingChecked 11 h ago
Visit Walmart
StaplesNew
In stock
$107.19Free shippingChecked 11 h ago
Visit Staples
QuillNew
Out of stock
$147.39Free shippingChecked 11 h ago
Visit Quill

Store links may earn us a commission. Some prices via Klarna.

GermGuardian AC4825 price history

Lowest price we've seen: $107.19 on Nov 11 at Staples. Tracked across 2 stores since Nov 11.

What reviewers say

4.7 / 5152 ratings

Owners rate it highly, praising its quiet low speed, easy setup and effect on dust and pet dander in bedrooms. Complaints center on filter and bulb replacement costs and on limited power for bigger rooms.

What people mention

NoisePraisedOwners say the low speed is quiet enough to sleep next to.
FiltrationPraisedReviewers report less dust and fewer allergy symptoms in bedrooms.
Filter costCriticisedBuyers complain that genuine replacement filters and UV bulbs add up over time.
Room coverageMixedIt works well in bedrooms but owners say it struggles in large open spaces.
SetupPraisedSetup and filter changes are described as quick and tool-free.

About the GermGuardian AC4825

Breathe fresh and cleaner air with this tower air purifier with true HEPA filter. GermGuardian air purifiers help reduce airborne germs and viruses, filter odors, and trap allergens with a True HEPA filter and optional UV-C light to deliver crisp, refreshing air to your home. Your at-home comfort can be customized with 3 speed settings, ultra-quiet mode on the lowest speed setting, and an optional UV-C light on an easy to use top panel. This air purifier circulates the air 1x per hour in 743 square foot rooms and 4.8x per hour in 153 sq. ft rooms, making it ideal for medium to large sized rooms such as: dorm rooms, bedrooms, and other living areas. Features a CADR rating of (99) for smoke, (118) for dust and (125) for pollen. Comes with a 3-year limited warranty. Only use genuine GermGuardian replacements. Your purifier is only as powerful and effective as the filter you put inside, and our Genuine GermGuardian replacement parts are essential for maintaining product performance.

Specifications

Filter Included: YesSource
Fan Speed Levels: 3Source
Width ("): 6.8Source
Color: WhiteSource
Height (")

Questions and answers

What size room is the AC4825 good for?: It is best for bedrooms, dorms and rooms up to about 150 square feet, where it cycles the air several times an hour. In larger rooms it still runs but cleans the air more slowly.
Does it really need the UV-C light?: The UV-C light is optional and can be switched off. The HEPA and carbon filters do the main particle and odor work; the UV bulb is an extra layer and needs replacing periodically.
How often do filters need changing?: GermGuardian advises replacing the HEPA filter roughly every 6 to 8 months and the carbon pre-filter more often, depending on use and pets. A clogged filter cuts airflow and cleaning power.
Is it loud at night?: On the lowest speed it is quiet enough for most bedrooms. The higher speeds are noticeably louder and better suited to daytime cleaning.
Can I use third-party filters?: GermGuardian says to use genuine replacements to keep rated performance. Third-party filters may fit but can reduce airflow and filtration.
Does it help with pet odors?: The carbon pre-filter helps with odors and the HEPA layer traps pet dander. Owners with cats and dogs report improvement, though a single unit suits one room.
Where is the GermGuardian AC4825 cheapest?: At Walmart, for $99.99, as of our latest check.
What do buyers say about the GermGuardian AC4825?: Rated 4.7 out of 5 from 152 ratings.
Where can I buy the GermGuardian AC4825?: 3 stores we checked sell it, including Walmart, Staples, Quill.