GermGuardian AC4300
Room air purifier · suggested up to 138 sq ft · True HEPA (H13)
Buy the GermGuardian AC4300WPT on Amazon — $119.99 →This exact model.
A room air purifier rated to clear 89 CFM of smoke-sized particles — enough for a room up to about 138 sq ft.
Buy this purifier
$119.99 at Amazon
GermGuardian AC4300WPT room air purifier
Check current price →Links to the exact listing; price was current at our last data refresh and can change at Amazon.
At a glance
Who it's for
Bedrooms, offices and nurseries — a smaller space you want kept clean and quiet.
The standout number
Smoke CADR of 89 — the number that decides how fast it clears wildfire smoke and fine particles.
The catch
AHAM's record lists no carbon stage. If odors or smoke smell matter, check the listing for a carbon filter before you buy.
What size room does the GermGuardian AC4300WPT cover?
AHAM certifies it for rooms up to 138 sq ft. In a room that size it cleans the air about 4.8 times an hour on its top speed (our math: 89 smoke CADR x 60 / the room volume, with 8-foot ceilings). In a room half that size (69 sq ft) it would clean the air about 9.7 times an hour.
The Verified Label — every AHAM-tested spec
not ENERGY STAR
US market
Clean Air Delivery Rate (CADR) — source: AHAM
Coverage & power — source: AHAM (+ computed)
Filter & identity
How it ranks
Where this unit sits among the 236 room air purifiers we track, on the two numbers that decide one: how fast it clears fine smoke particles, and how big a room it covers. A higher percentile is better.
Smoke CADR
Better than 15%
of the 236 units with a published smoke CADR
Suggested room size
Better than 15%
of the 236 units with a published room size
Compare similar air purifiers
Every certified version of this unit
AHAM certifies each colourway and region separately, so this machine holds 2 certificates. They are the same purifier — identical CADR — sold under different SKUs. Each row is linkable.
| Certified model | Dust | Smoke | Pollen | Room |
|---|---|---|---|---|
| AC4300BPTCA | 100 | 89 | 106 | 138 sq ft |
| AC4300WPTthis page | 100 | 89 | 106 | 138 sq ft |
Frequently asked questions
How big a room does the GermGuardian AC4300WPT cover?
AHAM suggests it for a room up to 138 square feet. That rating assumes it runs on high and cleans the air about 4.8 times an hour. For faster cleaning — say for wildfire smoke or allergies — size it to a smaller room than the maximum.
What is the CADR of the GermGuardian AC4300WPT?
Its AHAM Clean Air Delivery Rate is 100 for dust, 89 for smoke and 106 for pollen, with a PM2.5 CADR of 94. CADR is cubic feet of clean air delivered per minute — higher clears a room faster.
Does the GermGuardian AC4300WPT use a real HEPA filter?
Its filter is listed as True HEPA (H13). True HEPA captures 99.97% of particles down to 0.3 microns.
How much power does the GermGuardian AC4300WPT use?
About 49.3 watts on its smoke-clearing setting, which works out to 1.8 CADR per watt — a measure of how much clean air you get for the electricity it draws. It is not ENERGY STAR certified.
Where can I buy the GermGuardian AC4300WPT?
It's a retail unit — we matched its Amazon listing, linked on this page, so you can check the current price and seller. The replacement filters are the recurring cost — check those before you commit to a brand.
Sources. Clean Air Delivery Rate (dust / smoke / pollen), PM2.5 CADR, suggested room size, ENERGY STAR status and power draw come from the AHAM Verifide air-cleaner directory (the industry's independent CADR test). Average CADR, clean-air-per-watt and the percentile figures are computed by Verified HVAC Data from those published ratings. We publish no star ratings and take no payment for placement. "Not published" means AHAM's record doesn't disclose it — we never fill a spec with a guess.
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