Big air cleaners

Why do they make the air cleaners so big when most rooms are small?

Loud air cleaners

Why do they have the medium and high speed on these? If you use some of them on those settings, you can't hear anything in the room.

Filter is too expensive

Having to vacuum out the air cleaner filter again because the new ones cost over $25 each to buy.

Air cleaner filter filled

The air cleaner filter always seems filled up with dust once again.

Endless dust in the air

Where does all this dust come from? Even with the air cleaners on you still have to dust.