We have a building near busy streets and construction. No matter how often, how much, how intensely we run the vacuum we can’t seem to get a handle on the dust.
Is there an inexpensive, great air purifier out there to really filter out the airborne dust?
I am NOT interested in all the latest spin and snake oil bells and whistles. I just want dustless air.
Additionally, are there air purifier systems with reusable or washable filters that anyone might recommend?
I had a honeywell air purifier that required regular replacements of filters. The filters were to each! I would love a system where I simply give the filter a wash or clean out some some compartment and violla!…the dust is gone and the machine is ready to run!
Are there any like this and do they really work?
the dust removal is the key. Sometimes air dust is bad enough to make you choke on it! Like when you blow leaves in august without a mask…
I am unconcerned with ions and UV and smells. JUST DUST! 
thanks.
The best air filters are electrostatic air filters, and the filter media is generally washable. Keep in mind that if the filter grabs 95% of the airborne dust that passes through the unit but construction dust keeps infiltrating your windows or doors, you’ll still have dust.
Construction sites are often subjected to dust regulations, so if earthmoving equipment is stirring up large clouds of dust you should call the local municipality or environmental regulatory body and ask that they require the site be sprayed with water periodically to keep the dust down. Extremely dusty sites are treated with a chloride solution for longer term dust control. Good luck with it!