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Posted on Sep 02, 2010

A/c seems not to working cooling down room What are my options?

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  • Posted on Sep 04, 2010
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Joined: Sep 04, 2010
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Could be several factors. Let me start by saying the unit you have should cool a room that totals around 450 square feet (Approx.).

If you do not know your rooms square footage just multiply the width of the room x the length of the room.

(e.g. 20' x 10' = 200 SF)

The above 450 SF is for a room with typical 8' ceilings. This is also a "Rule-Of-Thumb" measurement, as windows, doors, insulation, and air leakages (heat gain) also play a role in calculation of heat loads. But this will get you close....

If the room is larger than 450 S.F. in size then the unit is too small for this size room.

A rule of tumb for sizing is: every 600 square feet requires a ton (or 12,000 BTU) of cooling. Again, without doing a proper load calculation on the room or area being cooled, it is hard to be exact.

The other possibility is the unit is not operating as it should due to mechanical or other issues. This is hard to specify. COuld be refrigerant levels are low, coils dirty, or filter dirty.

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