If youre trying to cool the whole house this isnt it. But if youre trying to cool a large open space its perfect or if you use it combined with a window unit then it could help keep the house cool the problem we noticed was the air doesnt really circulate so what ever room you have it in that room will be lime walking into a freezer but the room around the corner will still be hot. The other problem we noticed is it like to freeze up we keep the temperature around 72-76 and even between thpse ranges blowing into a 450 as ft area it will still go into freeze mode.