Compare air purifiers
Two purifiers. One question.
Forste and Stor use the same three-stage filtration — pre-filter, H13 and carbon. What separates them is the space each one is built for, so the decision is the size of your room.
How big is the room?
Drag the slider, or pick a typical space
Recommended
Forste
At 450 sq ft you are inside Forste's rated range of 1,237 sq ft. It uses exactly the same three-stage filtration as Stor, so there is nothing to gain from sizing up — spend the difference on a second device for another room instead.
Side by side
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Forste
Your pickQuiet and design-focused. Ideal for small to medium spaces.
1,237 sq ft rated
Shop Forste -
Stor
Your pickPowerful and sleek. Ideal for large and open-plan spaces.
2,775 sq ft rated
Shop Stor
| Specification | Forste | Stor |
|---|---|---|
| Room size it is rated forThe number that decides it | Up to 1,237 sq ft | Up to 2,775 sq ft |
| Best forWhere each one earns its place | Bedrooms, nurseries, home offices, apartments | Open-plan living, basements, large shared rooms |
| PriceWhat it costs today | $229.00 | $349.00 |
| CADRMaximum PM2.5, from the US manual | 165 CFM | ~371 CFM |
| Rated powerUS manual | 60 W | 102 W |
| Loudest settingUS manual — no test distance is stated | 66 dB(A) | 71 dB(A) |
| Quietest settingUS manual, constant-speed table | 20 dB(A), Silent and Sleep | 24 dB(A), Silent |
| Operation modesUS manual | 12 | 10 |
| SizeUS manual | 22.2 × 12.8 × 7 in. | 25.8 × 16.9 × 8.6 in. |
| WeightUS manual | 13.67 lb | 19.84 lb |
| FiltrationIdentical on both models | Three-stage: pre-filter, H13, carbon | Three-stage: pre-filter, H13, carbon |
| Pre-filterFirst stage | Holds hair, lint and larger dust | Holds hair, lint and larger dust |
| H13 filterSecond stage | Captures fine airborne particles | Captures fine airborne particles |
| Carbon filterThird stage | Adsorbs gases and odors | Adsorbs gases and odors |
| CharacterHow Klarta describes each one | Quiet and design-focused | Powerful and sleek |
| App controlPair over Wi-Fi in the Klarta app | Yes | Yes |
| Manual includedUse and maintenance, in the box | Yes | Yes |
| Replacement filtersSold in the filters collection | In the filters collection | In the filters collection |
| ShippingSame for every order | Free standard, $15 expedited | Free standard, $15 expedited |
| ReturnsUndamaged items | 30 days from delivery | 30 days from delivery |
Still deciding
Three situations we get asked about weekly
If none of these is yours, email us the room and we will name one model.
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A bedroom, and someone who sleeps badly
A closed bedroom is almost always inside Forste's range. One device in the room you sleep in beats a bigger one in the hallway — air does not travel through a closed door.
Forste
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Kitchen and living room in one open space
Count it as a single room and add the floor areas together. Cooking is one of the biggest indoor particle sources there is, so this is the case for Stor rather than two small units.
Stor
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A whole apartment, on a budget
Buy for the room you spend the most hours in first — usually the bedroom — and add a second device later. Two rooms covered properly beats four rooms covered badly.
Start with one
A different job
Humea is not on this table for a reason
A purifier removes particles from the air. A humidifier corrects air that is too dry. They are not alternatives, and neither one does the other's work — which is why Humea sits outside this comparison rather than at the cheap end of it.
- Type
- Evaporative humidification
- Tank
- Up to 0.8 gal (3 L)
- Filter life
- About 6 months
- For
- Pets, plants and people
Not sure? Describe the room and we will pick.
Send the approximate floor area, whether the doors stay open, and who lives there — pets, allergies, a baby. We answer with one model, not a catalog.
Email support@klarta.com