Been looking at this for a long time, don't know whether to hoot or not.
All the recent comments, even on 2nd of June, are good. Well I have 11 smoke detectors at home and have 3 as spares, so no worries on that part.
HEPA Filter size is 10 inch by 11 inch by 1 inch. But if you forgo the AC filter, probably can free up some 0.5 inch. So the Fellowes HF-230 and Vornado MD1 True HEPA filter from Amazon can cut and fit.
The stock filter is most probably some HEPA10 or something.
Comments all say output airflow is strong. (can't totally trust the specs)
Only RMB299/SGD60. 4PX forwarder shipping probably SGD35.8 or so. (from what I read, nobody kena volumetric wt before by 4PX)
chaolu/