I bought the LG LP1419IVSM air conditioner when my central air conditioner stopped functioning.  I have been using the air conditioner for seven weeks and it has functioned flawlessly.  I have casement windows and constructed a foamboard piece of installation with an exhaust hose opening to fit where the window screen is located. Once the foamboard piece is installed in place of the screen, the exhaust hose is taped over the foamboard opening to vent the hot air from the air conditioner to the outside.  The portable air conditioner is a temporary solution until a new heat pump is installed.  We have had temperatures reaching the upper nineties and the air conditioner has kept my house cool.  I use a fan to blow cool air from the upstairs to the downstairs.  The air conditioner is cooling around 950 square feet.

	
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