Frankly speaking, the most effective dehumidifier is an air-con, by far. Besides, with Singapore's increasing temperatures, you'd want dehumidifying together with cooler temperatures.
You may already have an air-con, but one is never enough (my bedroom has 4 separate air-cons, and I turn on between 1 to 4 at a time) depending on the ambient temperature and weather, and you'll want a backup in case one fails (repairing may take over a week).
As for emptying the condensate, it depends on your air-con dehumidifying and/or cooling settings. I personally use plastic jerry cans (don't use metal jerry cans as they rust badly) for my air-cons, and don't find it too much of a hassle to empty away the condensate, small price to pay for necessary comfort in crazy hot & humid Singapore.
And if emptying the condensate really bothers you, Trentios has a few air-con models that have built-in vaporizer, ie. automatically vaporizes away the condensate through the hot-air outlet so you needn't manually empty the condensate. However (see my next post below), most air-cons that come with built-in vaporizer only reduces, rather than totally eliminate, the amount of condensate to be manually emptied.
I'll reproduce my post from
Bad New Brown's thread on buying a portable air-con.
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An understated factor in choosing your air-con (portable or otherwise), is the ease of removing, cleaning and reinstalling the filters. On that note, I strongly recommend the Trentios portable air-cons SIN-TP9/15, SIN-TP7/14 and SIN-TP1/10.
Most portable air-con filters are always irritatingly difficult to remove and fix back (ie. poor design). Only the Trentios SIN-TP9/15, SIN-TP7/14 and SIN-TP1/10 models, have filters that are ridiculously easy to remove, clean and and reinstall.
15,000 BTU
6-in-1 Functions :
Cooling, Heating, Fan, Dehumidifying, HEPA Air Purifying, Wifi Auto Air Swing
Touch-screen controls with LCD display
Wifi-enabled with smartphone control (optional)
Weight: 29kg
Dimensions (mm): 350W x 535D x 600H
http://www.trentios.com/products/portable/#hybrid
The Trentios (Singapore) website says now got special promotion 40% discount, with free delivery, free installation and free 6 years warranty. That's a crazy ass good deal.
http://www.trentios.com/promo/