Levoit Core 200S-P
AHAM verified
- Really cleans
- 137 sq ft12 m² 12 m²137 sq ft
- Box says
- 672 sq ft62 m² 4.9× overstated
- New filter
- 6–8 months
GermGuardian · AC4825E
GermGuardian AC4825E
Really cleansAHAM verified
150 sq ft14 m² 14 m²150 sq ft
At 4.8 air changes an hour with a 2.5 m ceiling
- Box says
- Cleans a 153 sq. ft. room in just 12.5 minutes or up to 743 sq. ft. every hourCleans a 153 sq. ft. room in just 12.5 minutes or up to 743 sq. ft. every hour (69 m²) 4.9× overstated
- New filter
- Every 6–8 months
A slim budget tower with a verified CADR and an optional UV-C lamp. Enough for a small bedroom; the box claim is far bigger.
Verdict
Who it's for
A simple, slim tower that does clean a small bedroom, and AHAM has verified its CADR. The room size on the box is how much air it moves in an hour, many times what it can keep clean. The UV-C lamp is optional and has its own bulb to replace.
Good
- CADR verified by AHAM
- Slim tower takes little floor space
- No ionizer
Trade-offs
- Only enough air for a small room
- No air quality sensor or auto mode
- Box claim is far bigger than the room it cleans
Spec facts
GermGuardian AC4825E · AC4825E
- Really cleans
- 150 sq ft · 14 m²14 m² · 150 sq ftat 4.8 air changes an hour, 2.5 m ceiling
- Box claim
- Cleans a 153 sq. ft. room in just 12.5 minutes or up to 743 sq. ft. every hourCleans a 153 sq. ft. room in just 12.5 minutes or up to 743 sq. ft. every hour (69 m²)4.9× overstated
- Maker’s claim: GermGuardian · checked 1 Nov 2026
- Filter
- GermGuardian HEPA Filter B (FLT4825)HEPA + activated carbon layer. Replace every 6–8 months
- Maker’s claim: GermGuardian · checked 1 Nov 2026
Certified: measured in an independent lab for AHAM’s Verifide programme. Maker’s claim: the manufacturer’s own figure, not independently checked. Where figures come from
Running it
Filter and upkeep
- Replacement filter
- GermGuardian HEPA Filter B (FLT4825)
- Type
- HEPA + activated carbon layer
- Replace every
- 6–8 months
A new filter every 6–8 months means 1.5–2 filters a year.
We have no Amazon link for this filter: the maker's page in the sources sells or lists it.
Source: Maker’s claim, GermGuardian, checked 1 Nov 2026
The box vs the maths
The box says 743 sq ft69 m². It really cleans 150 sq ft14 m².
To clean 743 sq ft69 m² it would only change the air in the room 1 time an hour. We size every purifier at 4.8 air changes an hour, the level AHAM's room-size guideline works out to.
The box gives two figures. The smaller one, the area it cleans every 12.5 minutes, is 4.8 air changes an hour and close to our figure. The one we show as the box claim is the bigger: the room it can change the air of once an hour.
168 m³/h smoke CADR ÷ (4.8 × 2.5 m ceiling) = 14 m² = 150.9 sq ft14 m²
Use the calculator for your exact room and ceiling, or read how we pick.
Drawn to scale: the box says “Cleans a 153 sq. ft. room in just 12.5 minutes or up to 743 sq. ft. every hour”, the purifier really cleans 150 sq ft, 4.9 times less.Drawn to scale: the box says “Cleans a 153 sq. ft. room in just 12.5 minutes or up to 743 sq. ft. every hour”, the purifier really cleans 14 m², 4.9 times less.
Room sizes
Which rooms it fits
It suits 107 sq ft10 m² rooms: there it has 40% more air than the room needs, so it needn't run flat out.
Under a 2.7 m ceiling it covers 139 sq ft, under 3 m 125 sq ftUnder a 2.7 m ceiling it covers 12 m², under 3 m 11 m²: still enough for every size it covers above (why).
For a 161 sq ft room or bigger it's too small, although the box claims 743 sq ft: the For a 15 m² room or bigger it's too small, although the box claims 69 m²: the 161 sq ft15 m² page lists models that cover it.
Room pages it qualifies for
Alternatives
The GermGuardian AC4825E or one of these?
The certified models closest in size, and what is different about each, from the same kinds of source.
Cleans 137 sq ft, 13 sq ft lessCleans 12 m², 2 m² less. Same sensor, ionizer and filter interval. 23.9 cm shorter and 0.9 kg lighter.
Levoit Core 300
AHAM verified
- Really cleans
- 217 sq ft20 m² 20 m²217 sq ft
- Box says
- 1,066 sq ft99 m² 4.9× overstated
- New filter
- 6–8 months
Cleans 217 sq ft, 67 sq ft moreCleans 20 m², 6 m² more. Same sensor, ionizer and filter interval. 19.9 cm shorter.
Levoit Vital 100S-P
AHAM verified
- Really cleans
- 217 sq ft20 m² 20 m²217 sq ft
- Box says
- 1,066 sq ft99 m² 4.9× overstated
- New filter
- 6–12 months
Cleans 217 sq ft, 67 sq ft moreCleans 20 m², 6 m² more. It has a PM2.5 sensor with auto mode. It goes longer between filters (every 6–12 months). 15.3 cm shorter.
Sources
Where these numbers come from
- Certified AHAM Verifide directory: GermGuardian AC4825E · AHAM Verifide
- Maker’s claim GermGuardian AC4825 22" Tower Air Purifier product page · GermGuardian
- Maker’s claim How often do I need to replace my filter? · GermGuardian
We don't test purifiers ourselves: every figure on this page is copied from these sources and was last checked on 1 Nov 2026. Spotted one that's wrong or out of date? Tell us and we'll fix it and change the date.