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Comparing 2 robot vacuums

Your shortlist side by side: today’s price, our score and every fact the maker states.

  1. ×
    Stadler Form Roger

    € 399Amazon.nl

    2.1 Best on 1 fact
  2. ×
    • Cheapest today
    • Highest score
    • Best on the most facts
    Levoit Core 400S-P

    On the market since June 2023

    € 259bol.com

    7.4 Best on 3 facts

Prices updated at 17:58

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Side by side

Green is the best of these 2, also when they share the lead.

Stadler Form Roger × Best on 1 fact Levoit Core 400S-P × Best on 3 facts
The facts that decide most
Lowest price € 399Amazon.nl € 259bol.com best
Score 2.1 7.4 best
Height lower is better 51.6 cm best 52 cm
Tests, rank and ratings
Rank rank 31 of 33 for large rooms rank 2 of 33 for large rooms
Customer rating – –
Running cost
Filter life longer is better 8 months 12 months best
Electricity a year lower is better – € 61 a year
Room size
Room size same on both large roomsup to 66 m² large roomsup to 33 m²
Noise and age
On the market since – June 2023
Smart features and warranty
App control same on both Wi-Fi Wi-Fi
Voice assistants – Alexa, Google Assistant
Matter – no (assumed)
Cleaning performance
Clean air delivery rate (CADR) 465 m³/h 400 m³/h
CADR measured to Not stated DOE test
Room size we compare on 39 m² 33 m²
Room size the maker claims 66 m² 33 m²
Air changes the maker assumes 3 per hour 4.8 per hour
CADR for smoke – 393 m³/h
CADR for dust – 408 m³/h
CADR for pollen – 440 m³/h
CADR for fine particles (PM2.5) – 401 m³/h
Filter
HEPA filter class H12 HEPA –
Filter layout same on both One combined filter One combined filter
Activated carbon filter same on both yes yes
Filter parts 1 –
Replacement filter part number R-013 –
Running costs
Carbon filter life 8 months –
Energy use a year – 237 kWh
Noise and power
Noise at the lowest speed 25 dB 28 dB
Noise at the highest speed 65 dB 54 dB
Power at the highest speed 100 W 38 W
Energy efficiency (IEF) – 5.8 cfm/W
ENERGY STAR certified – yes
Air quality sensing
Automatic mode same on both yes yes
Air quality sensors – PM2.5
Particle sensor – Laser
Build
Width 420 mm 274 mm
Depth 200 mm 274 mm
Weight 6.8 kg 5 kg
Shape – Floor box
Extras
Ioniser – None
Ozone produced – 0 ppb
Warranty and certification
Warranty same on both 2 years 2 years
AHAM Verifide certified – yes

Facts as the maker states them. A dash means the maker does not name it. Each model’s page gives the source of every fact. Noise is the maker’s own figure, so we do not judge it, and a customer rating only counts from 20 reviews.

The score is out of 10: 60% measured facts and 40% shop ratings. A model is ranked only when its CADR is known. Method.

Room size
Price
Colour
Customer rating5★
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Number of reviews
Clear all filters 0 of 212 models

No model fits all these filters.

Only models rated at least 5 stars from at least 20 reviews at the shops that report customer ratings. Models with fewer reviews or without a rating fall outside this filter.

Lowest price at every shop that delivers to the Netherlands, VAT and delivery included. * = delivery cost and VAT estimated for a foreign shop.

Air purifier market report, September 2026 No prices yet, but 1 new model.

Frequently asked questions

How big an air purifier do I need?

Match it to the size of the room. Each model in the ranking is grouped by the room size its maker states, and the lists keep a model out when it states none. A common rule of thumb is a clean air delivery rate (CADR) in m³/h of at least 12 times the room’s floor area in m², for a ceiling of 2.4 metres.

What is the difference between HEPA H13 and True HEPA?

Both are high-efficiency filters. True HEPA is the American name for a filter that catches 99.97% of particles of 0.3 micrometres, and H13 is the European class for 99.95%. We read the class the maker states and do not treat a filter called HEPA-type or HEPA-like as either.

Can an air purifier make ozone?

Some can, mostly models with an ioniser or a plasma feature. California limits ozone from indoor air cleaners to 50 parts per billion, and the CARB certification shows a model meets that limit. Our asthma filter leaves out models whose ioniser cannot be switched off.

Whose tests we use

Beside each model we also show where these testers place it in their own lists, without counting it in the score:

How we combine measured facts and owners’ ratings into one score is on the method page.

Looking for a bargain? The air purifiers with a real price drop today →

Looking for something new? The air purifiers launched in the past year →

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