Haze season has a ritual: refresh the PSI app, close every window, stare at the ceiling fan. The Homefish USB Air Purifier Negative Ion is S$22.20 and aimed at the room you retreat to when the skyline disappears.
- What you get with the Homefish USB Air Purifier Negative Ion
- Will it cope with a bedroom?
- Who should buy it, and who should skip it
- Filters, noise and running costs
- Buying from AliExpress in Singapore
- The verdict
- FAQ
What you get with the Homefish USB Air Purifier Negative Ion
It is an air purifier listed at S$22.20 (marked down from S$51.68), with 699+ recent orders and a 87.7% positive rating.
The listing title mentions: ionizer, formaldehyde (HCHO) sensing and USB or 12 V power. Confirm the details on the product page, because titles are written by sellers, not by an editor with a conscience.
The title mentions ionizing or ozone features. Some ionizers produce ozone, a lung irritant, so check the product page for ozone emission details before you buy.
Will it cope with a bedroom?
Small rooms are forgiving. A compact purifier can turn over a small volume of air several times an hour, as long as the CADR on the listing is real. Check it against your room with the CADR calculator, and read our room size guide before you commit.
Who should buy it, and who should skip it
Good fit: Anyone with a bedroom of roughly 8 to 15 m² who wants cleaner air at night and does not mind changing a filter every so often.
Skip it if: Anyone trying to clean an open-plan living area, or who needs medical-grade performance. A bedroom unit has limits, and a family room with the balcony door open will test them.
Filters, noise and running costs
Check the noise level at low speed, since that is where you will probably run it. Filters wear out faster in a long haze season, so look up the replacement filter price and availability before you buy the machine. A cheap purifier with an impossible-to-find filter is not cheap.
Buying from AliExpress in Singapore
This one looks USB or low-voltage powered, which sidesteps the wall-plug question. Check the cable and the power source it expects.
Delivery: the date at checkout is the number to trust. If you are buying with a haze forecast in mind, give yourself a buffer.
GST: depending on the seller and order, GST may already be in the price or added at checkout. The total on the payment page is the only number that counts.
Seller check: look at the store rating, how long the store has been open and recent buyer photos. A 4.8 rating on a three-week-old store is not the same product as a 4.8 on a three-year-old one.
The verdict
If your bedroom is on the small side and the plug situation sorts itself out, the Homefish USB Air Purifier Negative Ion is a reasonable low-cost bet. If the listing hides its CADR or filter grade, keep scrolling.
What works
- Small footprint for bedroom use
- Easy to run at low speed overnight
- Low entry price compared with big-brand models
What to watch for
- Coverage claims in listings are often generous
- Replacement filters can be hard to find
- Specs are written by the seller, so verify before relying on them
Quick answers
Is this purifier big enough for my bedroom?
Work out your room volume and aim for a CADR that gives 4 to 5 air changes an hour. The CADR calculator does the maths in seconds.
Is it quiet enough to sleep next to?
Check the listed noise level at the lowest speed and read recent buyer comments. Specs at full speed tell you little about night use.
Does this ship to Singapore?
Listings on this site are requested for Singapore delivery and shown in S$. Confirm the delivery estimate, GST and final price at checkout.
Ready to see the current price?
Buy on AliExpressThis write-up is based on the listing details and general know-how. We have not tested this specific product. Last updated 2026-10-15.
Read before you buy
- What size air purifier do you need for an HDB room?
Work out the right air purifier size for an HDB bedroom or living room. CADR explained in plain English, with worked examples and a free calculator.
- Buying an air purifier from AliExpress in Singapore: what to check first
Thinking of buying an air purifier on AliExpress? Plug type, GST, delivery, filters and red flags in listings: a Singapore buyer checklist before you pay.
