The best Amazon Big Spring Sale air purifier deals at a glance: Best budget air purifier deal Sharp Smart Air Purifier for XL Rooms (FXJ80UW) $299.99 (save $200) Get Deal Best premium air purifier deal Dyson Purifier Hot+Cool HP1 $499 (save $160.99) Get Deal Amazon’s Big Spring Sale is nearly here, but if cleaner indoor air is already high on your shopping list, you do not need to wait for the official kickoff date of March 25 to 31 to start saving. A couple of standout air purifier deals are already live at Amazon, including one option built for extra-large rooms and another premium model that doubles as a heater and fan. There’s also already early spring sale deals on Amazon Echos, budget TVs, and even robot vacuums. In the meantime, though, whether you are dealing with spring pollen, pet dander, smoke, or just want to freshen up a stuffy room before allergy season really ramps up, these early offers are already top contenders worth your time, considering, at the very least.…