Buy a box floor fan and a 20x20 air filter,  turn fan on low, hold the filter to the back it will sucked it the back of the fan no tape is needed.  You now own a glorified $200 air purifier, if you have dogs buy the filter with baking soda it will help with any unpleasant smells.

Rainy days are my favorite day to dust, Why? Because with the moisture in the air helps the to dust to settle down. Turn on your floor fan with the filter, put on your favorite song, grab your favorite furniture cleaner and microfiber cloth to start dusting.  The results you will find is that your air quality will be better and you will not need to dust as often.