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Posted by Bubba on April 28, 2007, 7:43 am
wrote:
>I own a 9000 BTU Royal Sovereign single hose unit. My experience is that
>the single-hose portable unit seems like it has the half the cooling power
>of a window unit with the same BTU (who knows, maybe less than half the
>cooling power of a 9000BTU window unit). Problem with the single-hose
>portable units is that they exhaust the hot air from the condenser out of
>the room. This creates negative pressure in the room, and if installed in a
>house, the room will draw air back into it from other rooms and ultimately
>from outside the house. The BTU rating of single-hose portable units does
>not factor in the warm air that is ultimately being drawn back into the
>house.
>
>If I were a betting man, there is no way you are going to get upper 70s or
>low 80s in hundred-degree weather by installing 12000 BTU portable AC if it
>is a single hose unit. Maybe if it were dual-hose there might be a chance.
>You can get dual-hose units which solve the negative pressure issue by
>having an additional intake hose that uses outside air to cool the
>condensor, but I'm told that the manufacturers tend to warn against keeping
>the intake hose connected if the outside temp is above 90 degrees because
>there is a chance the condenser could overheat. If I were getting a
>dual-hose unit I would make sure it is okay to keep the intake connected
>hose up to 100 degrees outside. (I'm not sure I understand higher outside
>temps would be problematic for keeping the intake hose connected...after the
>condenser on window units and split systems are subject to those high
>temps.)
>
>Please keep the group informed what you decide to go with and whether or not
>it worked to your satisfaction.
>
>Jay
>
NO, please dont. Inform Jay only by email because no one in here
really gives a rats ass.
Bubba
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