Its CADR is not known yet, so it is not in our ranking.
Is the Clean Air Optima CA-508 right for your home? Find out in 7 questions →
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-508 | Higher score, 30% cheaper Clean Air Optima CA-502 Desktop Best on 1 fact | Higher score, 18% cheaper Clean Air Optima CA-503 Compact Best on 1 fact | |
|---|---|---|---|
| Price and ranking | |||
| Lowest price | € 169bol.com | € 119bol.com best | € 139bol.com |
| Score | not in our ranking | best | |
| Rank | – | rank 2 of 4 for small rooms | rank 1 of 4 for small rooms |
| Customer rating | – | – | – |
| Room size | |||
| Room size | – | small rooms | small rooms |
| Size, noise and age | |||
| 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.
On 17 October 2026 the lowest price for the Clean Air Optima CA-508 is € 169 at bol.com, delivery to the Netherlands included.
All prices include VAT and delivery to the Netherlands. We may earn a commission when you buy through these links. It never changes our ranking.
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The numbers that matter first, then every fact by group. As published by the maker or the shop we read it from.
The test the CADR comes from. AHAM AC-1 and the DOE test are independent and comparable. A maker's own test is not.
The CADR measured with pollen.
The room size the maker states. Makers use different rules, so we show it but never rank on it.
How fine the filter is. True HEPA and H13 catch at least 99.97% of particles at 0.3 microns. HEPA-type is a weaker claim with no test behind it.
Whether the particle and carbon layers are one filter or separate ones. Separate filters let you replace only the part that is spent.
A filter of activated carbon that takes out smells and some gases. It does not catch particles.
The sound level at the lowest speed, as the maker measures it.
The sound level at the highest speed, as the maker measures it.
The power the purifier draws at its highest speed.
What the purifier weighs. It counts most if you move it from room to room.
Sources: Manual
