Philips NanoProtect filters by range
| Philips series | Filter | Typical UK price* |
|---|---|---|
| Series 800 / 1000 | NanoProtect FY0194 (integrated HEPA+carbon) | ~£30–£45 |
| Series 2000 / 2000i | NanoProtect HEPA FY2422 + carbon FY2420 | ~£45–£70 (pair) |
| Series 3000 / 3000i | NanoProtect HEPA FY3433 + carbon FY3432 | ~£55–£80 (pair) |
*Approximate UK prices at the time of writing — confirm current pricing and your exact FY code before buying.
How often to replace
Philips filters are rated for roughly 12 months of typical use; the active-carbon layer often needs replacing sooner if you're targeting odours or cooking smells. The unit's filter indicator estimates life from runtime — remember to reset it after fitting a new filter.
The running-cost reality
On a Series 2000/3000, a full HEPA + carbon refresh once a year is £45–£80. Over a few years the filters cost more than the purifier did — the familiar proprietary trap.