About Orzennia
Five purifiers, one job, done properly.
Orzennia makes air purifiers for the home — five of them, sized from a small bedroom to an open floor plan. No humidifiers, no diffusers, no smart-home ecosystem. One category, taken seriously.
Air purification is easy to sell badly. The claims are invisible, the numbers are unverifiable by the person buying, and most of the category leans on that. We would rather publish the figures, say plainly where they come from, and let the specification do the talking.
Every model runs the same three stages: a washable pre-filter, high-density particle media, then activated carbon.
What we make
Five purifiers built on one filtration approach. A washable outer pre-filter catches hair and larger dust so it never reaches the media behind it. High-density particle media does the fine work. Activated carbon handles everyday household odours and gases.
What changes between models is how much air they move. That is the only meaningful difference, so it is the one we lead with — each model is rated for the floor area it refreshes about four times an hour.
- Range5 purifiers, A1 to A5
- Coverage285 to 1,043 sq ft at 4×/hour
- FiltrationThree stages on every model
- FiltersA matched filter for each model
- Warranty1 year, extendable to 3
- Trial30 days at home
The range, by room size
How we work
Orzennia is a small operation. We choose the specification, set the range and the sizing, and work with manufacturing partners who build to it. We are not a factory and we do not pretend to be one — we are the people who decide what gets made, to what standard, and who answer the email when something goes wrong.
The performance figures on this site are the manufacturer’s ratings for the units we sell. We publish them as given, in the same units the industry uses, so they can be compared against anything else you are looking at.
What we hold ourselves to
Figures, not adjectives
Square footage, air changes per hour, and which stages each model carries. Stated on every product page, in units you can check against a competitor.
Claims that stay inside the evidence
Filtration ratings are lab figures under controlled test conditions, and we say so. Real rooms vary with airflow, room size and filter age.
An appliance, not a treatment
These are consumer appliances, not medical devices. We do not claim they prevent, treat or cure anything, and we never will.
Filters you can actually get
Every model has a matching replacement filter, listed and in stock. A purifier you cannot re-filter is a purifier with an expiry date.
Company details
Orzennia is a trading name of RESING CO., LIMITED, a company registered in the Hong Kong Special Administrative Region.
Registered address: Room 605, 6/F, Fa Yuen Commercial Building, 75-77 Fa Yuen Street, Mong Kok, Kowloon, Hong Kong SAR
Email: info@orzennia.com
Support hours: Monday to Friday, 9:00 a.m. to 6:00 p.m. (HKT). Email is the only support channel we run, so nothing falls between two desks. We aim to reply within 1 to 2 business days.
Coverage figures are manufacturer ratings for four air changes per hour. Sensing capability, filter stack and coverage vary by model — each product page lists what that unit includes. Orzennia products are consumer appliances and are not medical devices.