How many air purifiers do I need?
In one line: plan for roughly one purifier per room you actually use — air doesn't move well through doorways and hallways, so a unit only really cleans the room it's in. Big or open-plan rooms may need two; a whole house isn't served by one central unit.
Why one unit won't do the whole home
Closed doors, walls and corridors stop clean air spreading from room to room. A purifier turning the air over nicely in the lounge does almost nothing for a bedroom down the hall. So the honest answer to "can one do my house?" is no — see air purifier for a whole house. Coverage is per room.
How to decide the number
- Per occupied room: one unit each for the rooms where you spend real time — typically the bedroom and living room first.
- Large or open-plan rooms: one high-CADR unit, or two spread out, to hit a good air-change rate (see open-plan rooms).
- Multi-storey: at least one per floor you use, since air barely moves between levels.
On a budget — where to start
If you can only buy one, put it in the bedroom — it's where you spend the most continuous time breathing. Add the main living space next, then any room tied to a specific problem (a pet room, a home office, a nursery). Buying one correctly sized unit per priority room beats spreading several undersized ones thin; check the sizing guide.
Next step
Kitting out more than one room? Browse the range (and bundle savings) in the CleanAirKits store.
FAQ
Can one air purifier cover a whole house? No — coverage is per room because air doesn't travel well between rooms. Plan roughly one per used room.
If I only buy one, where should it go? The bedroom — you breathe there for hours of continuous sleep, so it gives the most benefit.