You can use it both way with sealed door or windows. Because closed airflow indoor environment are more polluted than outside.

For Air Purifying, is always recommend to use HEPA filter type Air Purifier.

budget come first

probably just stick with Xiaomi Air purifier if budget are low. Conclusion. Xiaomi > ALL! lol

Home use Atmosphere, car use Mi Car Purifier. My friend in SG using 2 of the Mi purifier since its launching, so far so good. nothing hiccup.

local Malaysia warranty and price tag?

Yes. Why not? Is nothing to do with air conditioning or not.

what was the current price?

as always want bang for bucks, and money per performance ratio, most people look into the Mi Purifier range.

I use this Singapore Gov Agency website as benchmark.
https://www.haze.gov.sg/resources/portable-...e-and-suppliers

They got provide CADR as well. Well, you know we Malaysia and Singapore have similar seasonal Haze event that came from Indonesia.

Yeah I know UK Allergy is NGO.

Meanwhile, here some guide from hardwarezone forum, on how to buy air purifier to deal with Haze.
https://www.hardwarezone.com.sg/feature-air...to-look-out-for

Define:
1. Good
2. Expensive

Good mean, have HEPA to filter what you want and enough of CADR to deal with your Room size. Low Noise, energy saving and yet zero ozone for environmental friendly. Other fancy feature like Wifi connected are side feature.

Expensive or not are very subjective, different budget can buy different level of Air Purifier. Of course bigger CADR will be more expensive. For entry level budget below 1k. I always recommend people go look for Xiaomi.

Talking about Air Purifier, my replacement HEPA filter cost as much as a new Mi Purifier 2S. LMAO. but only change every aprox 4-5 years based on my usage.

Cukur haze now gone for now. I can delay again for the purchase. lol

Good HEPA filter are trapped all the particles inside, it won't come back out when you are not using the filter or keep it idle for months.

Good HEPA = True HEPA

Which filter last up to 10 years? The HEPA? If the claim by their own company are BS usually.

Maybe they wanna bluff consumer that every month use 1 hours only, therefore last for 10 years. lol

Best look for those have electronic monitor system. Whether is build in the purifier system or app connected to calculate how many air circulate for the usage.

No mention of CADR too. As expected from Sharp. Somemore cost at RM2k too. Personally not recommended.

there is no Air Purifier no need to change filter.

Always look for Air purifier that must/need to change filter. at least with monitoring system to calculate.

where u bought?