Philips FY3433 NanoProtect HEPA Filter – Price, Compatible Models & When to Replace
The Philips FY3433 NanoProtect HEPA Filter is a genuine Philips replacement part for the Philips AC3256, AC3257, AC3259, AC4550 and AC4558 air purifiers. At Sparemaster it costs ₹2,820 (MRP ₹3,695, 24% off), with a GST invoice and shipping across India.
Which Philips air purifiers does it fit?
Philips AC3256 (any AC3256/xx variant)
Philips AC3257 (any AC3257/xx variant)
Philips AC3259 (any AC3259/xx variant)
Philips AC4550 (any AC4550/xx variant)
Philips AC4558 (any AC4558/xx variant)
Check the model number on the sticker under or behind your purifier before ordering – filters are model-specific and a filter from a different series will not seal properly.
What the FY3433 filter does
It is a NanoProtect HEPA filter. Philips rates its NanoProtect filters to capture 99.97% of particles as small as 0.003 micron, which covers PM2.5, fine dust, pollen, pet dander and smoke particles.
When should you replace it?
Your purifier counts filter hours and shows a filter-replacement alert when the filter is used up; some models stop running until it is changed. In Chandigarh and North India, winter smog and Diwali smoke load filters much faster, so the alert often comes earlier than the usual one-year life. Signs it is due: the alert light is on, airflow is weaker, the purifier stays on high all the time, or a smell comes back.
After fitting the new filter, reset the alert – see our guide When to Replace Your Philips Air Purifier Filter (and How to Reset the Alert).
Replace the pair together
These purifiers use two filters. The matching one is the FY3432 Active Carbon Filter (₹1,836).
To change both at once, take the FY3433 + FY3432 set (₹4,792) – it costs less than buying the two separately.
Genuine vs duplicate filters
Cheap copies often use thinner media, little or no real carbon and a loose frame that lets air bypass the filter – the purifier's AQI reading stays high and the filter-life counter no longer matches reality. We sell only genuine Philips filters. Read more: Genuine Philips Air Purifier Filter vs Duplicate.
Buy from Sparemaster
Genuine Philips part, GST invoice, packed carefully and shipped across India.
Sparemaster is the spare-parts store of New Jaspal Electricals, Shop No. 101-102, Sector 38-C, Chandigarh.
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