Fresh Step, Tidy Cat
Fresh Step is extremely dusty, and is also strongly scented. I would not recommend it for any house with an asthmatic cat or human.
Tidy cats pours out non-dusty, but does become dusty over time in the box. It clumps pretty well. The newer lines are scented, which I avoid as an asthmatic. I would recommend the older (blue cap or red cap) versions. Avoid the ones with Glade, as strongly scented