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rowan · 03-15-2009, 05:43 PM

A portable A/C unit without anything attached to its exhaust is unfortunately just a dehumidifier (and a small heater, since its internal parts consume electricity and generate some waste heat). So the net effect is a drier, slightly warmer room.

Why can't you face the exhaust baffle downwards (at the bottom of the window) and stuff some weatherproofing onto the other two sides of the "triangle" on each side of the window?

Another option, assuming you own the place or you have your landlord's permission, is to return it and install a split system. This is a permanent installation with the main guts of the A/C located outside.

BTW, one reason that window units are better is that most portable A/C units have an uninsulated exhaust tube, which means some of the heat radiates/escapes back into the room. There are also problems with seals between the unit and tubing; I've had to use some extra screws and gaffa tape to stop all of the air leaks on my portable A/C's outlet.

03-15-2009, 05:43 PM
rowan Too lazy to set a custom title Join Date: Mar 2002 Location: Australia Posts: 17,393	A portable A/C unit without anything attached to its exhaust is unfortunately just a dehumidifier (and a small heater, since its internal parts consume electricity and generate some waste heat). So the net effect is a drier, slightly warmer room. Why can't you face the exhaust baffle downwards (at the bottom of the window) and stuff some weatherproofing onto the other two sides of the "triangle" on each side of the window? Another option, assuming you own the place or you have your landlord's permission, is to return it and install a split system. This is a permanent installation with the main guts of the A/C located outside. BTW, one reason that window units are better is that most portable A/C units have an uninsulated exhaust tube, which means some of the heat radiates/escapes back into the room. There are also problems with seals between the unit and tubing; I've had to use some extra screws and gaffa tape to stop all of the air leaks on my portable A/C's outlet.