I have always cooled the house with an evaporative cooler (swamp cooler), I installed hardwood floors several years ago and the humidity from the evaporative cooler is lifting some of the planks, so not wanting to run the evaporative cooler this year I purchased this as a temporary solution. I really did not expect this to cool the house because of the amount of square footage and 10 foot vaulted ceilings. WOW, I was wrong! Even with the high temps (up to 105 last week) this unit has kept up very well. We just run it on "eco" mode set at 70. Very impressed. Very quick and easy install, and great price.