OTTOblack 93 €
Deliveryabout 1–4 days
Returns30-day free returns
Clean Air Optima CA-501
Its CADR is not known yet, so it is not in our ranking.
Is the Clean Air Optima CA-501 right for your home? Find out in 7 questions →
Before you buy, compare it with 2 recommended alternatives
Beside it, two models on sale today that come closest to it on score and price, for the same room size where we have them.
Green is the best of these 3, also when they share the lead.
| This model Clean Air Optima CA-501 Best on 1 fact | Higher score, 42% dearer Clean Air Optima CA-503 Compact Best on 2 facts | Higher score, 377% dearer Philips Air Performer 8000 AMF870 | |
|---|---|---|---|
| Price and ranking | |||
| Lowest price | 93 €OTTO best | 132 €OTTO | 443 €OTTO |
| Score | not in our ranking | best | |
| Rank | – | rank 1 of 1 for small rooms | rank 1 of 2 for medium rooms |
| Customer rating | – | – | – |
| Room size | |||
| Room size | small roomsup to 15 m² | small roomsup to 30 m² | medium roomsup to 70 m² |
| Size, noise and age | |||
| Height lower is better | – | 27.4 cm best | 106.4 cm |
| On the market since | – | – | – |
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.
Prices per shop
On 17 October 2026 the lowest price for the Clean Air Optima CA-501 is 93 € at OTTO, delivery to Germany included.
All prices include VAT and delivery to Germany. We may earn a commission when you buy through these links. It never changes our ranking.
OTTOblack Price history
Lowest price per day
Lowest since 17 Oct93 €
Highest since 17 Oct93 €
Price drops since 17 Oct0no drop seen yet
Clean Air Optima CA-501 specifications
The numbers that matter first, then every fact by group. As published by the maker or the shop we read it from.
Clean air delivery rate (CADR)25 m³/h
Room size we compare on2 m²
Power at the highest speed3 W
Cleaning performance 4 facts
- Clean air delivery rate (CADR)
How much clean air the purifier delivers an hour, measured with smoke, dust and pollen. A higher figure cleans a bigger room or the same room faster.
- 25 m³/h
- CADR measured to
The test the CADR comes from. AHAM AC-1 and the DOE test are independent and comparable. A maker's own test is not.
- Not stated
- Room size we compare on
The room size where the purifier changes the air 4.8 times an hour under a 2.5 m ceiling, worked out from its CADR. We use it so every model is compared on the same rule.
- 2 m²
- Room size the maker claims
The room size the maker states. Makers use different rules, so we show it but never rank on it.
- 15 m²
Filter 2 facts
- Filter layout
Whether the particle and carbon layers are one filter or separate ones. Separate filters let you replace only the part that is spent.
- One combined filter
- Activated carbon filter
A filter of activated carbon that takes out smells and some gases. It does not catch particles.
- yes
Noise and power 1 fact
- Power at the highest speed
The power the purifier draws at its highest speed.
- 3 W
Build 1 fact
- Weight
What the purifier weighs. It counts most if you move it from room to room.
- 0.3 kg
Extras 1 fact
- Ioniser
An ioniser charges particles so they settle. Some also make a little ozone, which is why a switch to turn it off matters.
- Always on
Warranty and certification 2 facts
- Warranty
The warranty the maker gives in Germany. Consumer law here stands apart from it and can last longer.
- 2 years
- Maker model numbers
- CA-501
Sources: Manual
The maker
Clean Air Optima
- Reviews on Trustpilot
- Headquarters: Netherlands
- Owned by Clean Air Optima International B.V., Netherlands
Clean Air Optima is a brand of Clean Air Optima International B.V., a company registered with the Dutch Chamber of Commerce in the Netherlands. Its range of standalone air treatment appliances includes air purifiers, humidifiers, air washers and dehumidifiers, along with hybrid models that combine humidifying or dehumidifying with air purification.