Works well in our open living, dining and kitchen area. Bedrooms and bathrooms that are isolated from the main living area get a little (approximately 20 percent) of the amount that the living area gets. But they are down hallways with only normal doorways for air circulation. House is 2300 sqft 1 story. Unit is easy to fill with water via a tank on the side that just lifts off by a top handle and can be filled in a normal kitchen sink by laying it on its side and swinging the faucet over the side fill port. Controls are simple and easy to understand and operate. Some people have said they have had problems with leaking around the castors due to cracks, so I left the casters off and set it on the floor. No problem so far with leaks. That was the only consistent issue I noticed in all the reviews I read and this unit had better reviews than the other mostly more expensive units.